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   GSC 100
          Global
Satellite Communicator




 User Manual
                        WARNINGS
                      GOOD JUDGEMENT
This product is an excellent navigation aid and communications
tool, but does not replace the need for careful orienteering and
good judgement. Never rely solely on one device for
navigating.
                          USE CARE
The Global Positioning System (GPS) is operated by the U.S.
Government, which is solely responsible for the accuracy and
maintenance of GPS.
The accuracy of position fixes can be affected by the periodic
adjustments to GPS satellites made by the U.S. Government
and is subject to change in accordance with the Department of
Defense civil GPS user policy and the Federal Radionavigation
Plan.
                       USE CAUTION
Accuracy can also be affected by poor satellite geometry.
When the accuracy warnings appear on the screen, use the
data with extreme caution.
               USE PROPER ACCESSORIES
Use only Magellan cables and antennas; the use of non-
Magellan cables and antennas may degrade performance or
damage the receiver, and will void the warranty.
                LICENSE AGREEMENT
Magellan grants you, the purchaser, the right to use the
software supplied in and with the GSC 100 Global Satellite
Communicator (the "SOFTWARE") in the normal operation of
the equipment. You may make copies only for your own
personal use and for use within your organization.
The SOFTWARE is the property of MAGELLAN and/or its
suppliers and is protected by United States copyright laws and
international treaty provisions; therefore, you must treat this
SOFTWARE like any other copyright material.
You may not use, copy, modify, reverse engineer or transfer
this SOFTWARE except as expressly provided in this license.
All rights not expressly granted are reserved by MAGELLAN
and/or its suppliers.
                                   RADIATION WARNING
                              Although no single value of "safe
                              radiation level" has been agreed upon
                              by all countries, the American National
                              Standards Institute (ANSI/LEEE C95.1
                              - 1992) recommends that people
                              should not be exposed to radiation
                              stronger than 1 milliwatt per square
                              centimeter at the frequencies used in
  RADIO FREQUENCY RADIATION
                              the Magellan GSC 100. Due to the
                              GSC 100 transmission times being
                              very brief, the amounts are well within
                              acceptable limits as set forth by the
                              American National Standards Institute.
                     LIGHTNING WARNING
Due to the extension capability of the ORBCOMM telescopic
antenna located on the GSC 100, it is strongly advised that
operations of the GSC 100 cease when thunderstorm or
electrical storm conditions are present.
      OBTAINING LICENSING FOR ORBCOMM
              COMMUNICATORS
Use of the ORBCOMM System outside the United States has
only been authorized by a limited number of foreign
Governmental Authorities. Use of the ORBCOMM System
outside the United States is permissible only when all
necessary permits, approvals and authorizations have been
received from the applicable foreign Governmental Authorities.
In addition, use of the GSC 100 outside the United States is
only permissible if it has been "type approved" for use in that
country or territory. Both the ORBCOMM System and the GSC
100 may need to be approved prior to use in a foreign country
or territory. For information on those countries or territories in
which use of the ORBCOMM System and the GSC 100 is
authorized, please contact ORBCOMM or your local service
provider.
      NOTICE OF COPYRIGHT PROTECTION
Copyright 1998 Magellan Corporation, 960 Overland Court,
San Dimas, CA 91773 USA. World Rights Reserved.
No part of this publication may be stored in a retrieval system,
transmitted or reproduced in any way, including but not limited
to photocopy, photograph, magnetic or other record, without
the prior written permission of Magellan Systems Corporation.
MagellanTM, GSC 100TM are the trademarks of Magellan
Systems Corporation.
ORBCOMMTM is the trademark of Orbital Communications
Corporation.
GlobalGramSM is a registered service mark of ORBCOMM
Global LP.
Part No. 22-60104-000
                              Contents
INTRODUCTION ........................................................... 1
   Welcome to the GSC 100 ........................................... 1
   Packing List ................................................................ 2
   Conventions Used in this Manual ............................... 2
   Messaging Activation ................................................. 3
GETTING STARTED ...................................................... 4
   Receiver Description .................................................. 4
      Keypad Description .............................................. 4
               Softkeys ................................................................ 5
               Arrow Keys ........................................................... 5
               Power Key ............................................................. 5
               Light Key .............................................................. 5
               Home Key ............................................................. 5
               Menu Key ............................................................. 5
               Enter Key .............................................................. 5
               Escape Key............................................................ 6
               Alphanumeric Keys .............................................. 6
     Installing the Battery .................................................. 7
     Charging the Battery ................................................... 8
     Turning the Receiver "ON" & "OFF" ........................ 9
     GPS Initialization ....................................................... 9
     Proper Handling - Signal Reception ......................... 12
     System (SYS) Modes ............................................... 14
         GPS Mode .......................................................... 14
         ORBCOMM Mode ............................................. 14
         AUTO Mode ....................................................... 14
     Creating a GlobalGram ............................................. 15
     Sending a GlobalGram ............................................. 18
  Receiving a GlobalGram .......................................... 20
  Your First Position Fix.............................................. 21
  Saving Your First Waypoint ...................................... 22
  Creating a GOTO...................................................... 25
  Navigating with the GSC 100 ................................... 25
REFERENCE ................................................................ 26
  General Usage........................................................... 26
     Turning the Receiver ON.................................... 26
     Turning the Receiver OFF .................................. 27
     Inputting Data ..................................................... 27
     Turning the Light ON and OFF .......................... 27
     The Main Menu .................................................. 28
  System (SYS) Modes ............................................... 29
     GPS Mode .......................................................... 29
     ORBCOMM Mode ............................................. 29
     AUTO Mode ....................................................... 29
  Messaging Operations .............................................. 30
     Selecting ORBCOMM Mode ............................. 30
     Initialization ........................................................ 31
     Preferred Gateway Control Center (GCC) ......... 32
     Default Characters .............................................. 33
     Font Size ............................................................. 33
     Display Characters Setting ................................. 34
     Auto Message Check .......................................... 35
     Address Book ..................................................... 36
               Viewing an Address ............................................ 36
               Creating a New Address ..................................... 37
               Editing an Address .............................................. 38
               Deleting an Address ............................................ 38
               Capturing an Address .......................................... 39
  GCC Addresses (Speed Dial) ............................. 40
Messages ................................................................... 41
  Requesting Message Check ................................ 41
  Messaging Icons ................................................. 42
  Viewing Received GlobalGrams ........................ 43
  Creating a GlobalGram ....................................... 45
          Sending Standard GlobalGrams .......................... 47
          Sending STORE & FWD Globalgrams .............. 49
  Sending a GlobalGram to a GSC 100 ................. 51
  Selecting Recipients from the Address Book ..... 52
  Inserting Symbols & Characters into GlobalGrams
      ...................................................................... 53
  Viewing Created GlobalGrams ........................... 54
  Accessing the Mailbox ....................................... 55
  Editing a GlobalGram ......................................... 56
  Copying a GlobalGram ....................................... 57
  Replying to a GlobalGram .................................. 58
  Forwarding a GlobalGram .................................. 59
  Deleting a Message ............................................. 61
  Message Status ................................................... 62
GPS Operations ........................................................ 63
  Selecting GPS Mode ........................................... 63
  GPS Icons ........................................................... 64
  NAV Screens ....................................................... 65
          Viewing the POSITION Screen .......................... 65
          Viewing the NAV 1 Screen ................................. 66
          Viewing the NAV 2 Screen ................................. 66
          Customizing the NAV Screens ............................ 67
             NAV 1 Screen ............................................... 68
             NAV 2 Screen ............................................... 69
PLOT Screens ..................................................... 69
     Viewing the POINTER Screen ........................... 69
     Viewing the PLOT Screen .................................. 70
     Changing the Plotter Scale .................................. 71
     Using PAN N SCAN ........................................... 71
     Setting a GOTO Using PAN N SCAN ................ 72
     Clearing Plotter Track ......................................... 72
     Viewing the ROAD Screen ................................. 73
Waypoints ........................................................... 73
     Saving a Position Fix as a Waypoint ................... 73
     Receiver Generated Waypoint Name .................. 74
     User Defined Waypoint Name ............................ 74
     Creating a Waypoint ............................................ 75
     Accessing the Waypoint Menu ........................... 76
     Viewing a Waypoint ............................................ 77
     Accessing the Waypoint Function Menu ............ 78
     Editing a Waypoint .............................................. 78
     Projecting a Waypoint ......................................... 79
     Deleting a Waypoint ............................................ 80
Routes ................................................................. 81
     Activating a GOTO Route .................................. 82
     Accessing the Route Menu ................................. 83
     Creating a Multi-Leg Route ................................ 84
     Activating and Deactivating a Route .................. 85
     Reversing a Route ............................................... 86
     Viewing the Route Summary (Edit Option)........ 86
     Viewing the Legs of a Route ............................... 87
     Inserting a Leg in a Route ................................... 87
     Deleting a Leg ..................................................... 88
     Adding a Leg ...................................................... 89
     Replacing a Waypoint ......................................... 90
     Navigating (Activating) a Leg ............................ 91
          Deleting a Route ................................................. 91
          Creating an MOB (Man OverBoard) Route ........ 92
          Creating a Backtrack Route ................................ 92
     Last Fix Buffer.................................................... 92
          Viewing a LAST FIX .......................................... 93
          Viewing the LAST FIX Trip Summary Screen ... 93
Setup Options ........................................................... 94
   GPS Setup ........................................................... 94
          Initializing the Receiver ...................................... 94
          Setting the Coordinate System ............................ 95
          Setting the Elevation Mode ................................. 96
          Setting Velocity Averaging .................................. 97
          Setting Speed Units ............................................. 97
          Setting Distance Units ........................................ 97
          Setting Elevation Units ....................................... 98
          Setting North Reference ...................................... 98
          Selecting Map Datum ......................................... 98
          Selecting Waypoint Sort ...................................... 99
          Selecting the Last Fix Interval ............................ 99
          Plot Setup ............................................................ 99
     General Setup ................................................... 100
          Selecting Time Format ...................................... 100
          Setting the Light Timer ..................................... 100
          Sampling ........................................................... 101
          Setting NMEA Port and Baud Rate .................. 102
          Selecting RS-232 Port and Baud Rate .............. 103
          Selecting Clear Menu ........................................ 103
          Contrast ............................................................. 103
Additional Features ................................................ 105
   Viewing ORBCOMM SAT STATUS Screen ... 105
   Viewing GPS SAT STATUS Screen ................. 106
   Viewing the Odometer ...................................... 107
        Resetting the Odometer and/or Trip Odometer 107
        Viewing the Clock ............................................ 107
        Viewing the SUN/MOON Screen..................... 108
        GPS Simulator .................................................. 108
        ORBCOMM Demo .......................................... 109
        Erasing Last Fixes ............................................ 109
        Accessing the ABOUT Screen ......................... 110
        Erasing Track from the Plotter Screen .............. 110
        Erase All Waypoints from Waypoint List ......... 110
        Clearing Receiver Memory .............................. 111
        Performing a Hardware Reset........................... 111
ICONS .......................................................................... 112
Warnings and Other Messages .................................... 115
Troubleshooting ........................................................... 119
    Contacting Customer Service ................................. 123
NMEA Data Messages ................................................. 125
Available Datums ......................................................... 132
Specifications ............................................................... 133
Coordinate Systems ...................................................... 135
What is GPS? ............................................................... 138
What is ORBCOMM? .................................................. 141
Where to Get More Information ................................. 145
Abbreviations ............................................................... 148
City Reference Chart ................................................... 150
Connecting External Power/Devices .......................... 157
Glossary ........................................................................ 160
Index ............................................................................. 169
INTRODUCTION

 Welcome to the GSC 100

  Congratulations on your purchase of the Magellan GSC 100
  Satellite Communicator, the world's first hand-held global
  satellite communicator. You now have the ability to send and
  receive GlobalGrams, e-mail messages, to and from anywhere on
  Earth. Because the GSC 100 uses standard e-mail protocols,
  sending and receiving GlobalGrams is easy. Communicate to any
  e-mail (Internet, X.400) address or another GSC 100. And, with
  its integrated GPS capability, the GSC 100 not only lets you know
  where you are, it guides you anywhere you want to go. You can
  identify your position, plot and track your course or store
  waypoints. Your GSC 100 will get you anywhere and back again
  at the push of a button. You can also relay your position to
  anyone, anywhere - no matter how remote you may be - with a
  GSC 100 GlobalGram. And with its rugged, splashproof
  construction, the GSC 100 is ready for action, no matter where
  your adventures may take you.
  To help you get started using your new GSC 100, turn to the
  section titled "Getting Started." This quick-start session will
  have you sending and receiving GlobalGrams as well as
  recording landmark locations and navigating in no time at all. It
  is important to note that, prior to use, you must activate the unit
  within the ORBCOMM network, as they are the service provider.
  Activation Instructions have been provided to assist you in
  activating your GSC 100. A Quick Reference Guide has been
  provided to assist in operating the unit while making your way
  outdoors. After you've learned the basics, the rest of this manual
  will give you detailed information about all the features and
  functions of your GSC 100 Satellite Communicator. A Reference
  Section, Troubleshooting, and Appendix, with Glossary, are
  included as well.

Magellan GSC 100 Global Satellite Communicator                     1
Packing List

    Before you begin using your new unit, make sure that all the
    items listed on the GSC 100 box are included. If any of the items
    are missing or damaged, contact Magellan customer service
    immediately at (800) 707-9971.
    Optional accessories are available from your local GSC 100
    Global Satellite Communicator dealer.

Conventions Used in this Manual

    The reference section of this manual is designed to assist you in
    the use of your GSC 100. Each topic in the reference section
    includes a brief description of the activity chosen as well as a
    detailed description of the keys to press and sample screens
    showing how the function is performed. In the reference section
    you will be given instructions to follow. Bolded words indicate
    the key or keys to be pressed; italics indicate the name of the
    screen to be viewed; and, ALL CAPS indicate a menu item to be
    selected.
    Also in the reference section are alerts to inform you of some
    cautions or notes that will assist you in using your Magellan GSC
    100 Satellite Communicator.


          The stop sign indicates the information enclosed is very
          important and should be read before moving on.

         The Magellan logo denotes information that can help you use or
         understand your receiver. While this information is not required
         to perform the activity, it may provide you with a better
         understanding of the activity or shortcuts you can use.




2                  Magellan GSC 100 Global Satellite Communicator
 Messaging Activation

  Prior to use, your GSC 100 unit must be activated within the
  ORBCOMM network by your local service provider. A set of
  Activation Instructions have been included with your GSC 100 to
  guide you through the activation process. Included in the
  Activation Instructions are the instructions, forms, payment
  information and a list of contacts. Activation allows your service
  provider to open an active account so that you can begin to send
  and receive GlobalGrams using your GSC 100. During the
  activation process you will receive a unique e-mail address for
  your GSC 100. Future system enhancements, or issues, will be
  communicated to you to keep you up and running. Activation
  procedures differ from country to country and should be verified
  by your local service provider.
        To legally operate a GSC 100, it is the responsibility of the user
        to obtain permission from the local telecommunications
        regulatory authorities of the country you are operating within.
        Using your GSC 100 in any country without permission causes
        you to run the risk of confiscation of your unit or legal action
        from local authorities. Normal practice for taking
        telecommunication equipment into another country is to apply
        for a license prior to travel. If a license has not been obtained
        before travel, the equipment may be put into storage by local
        authorities until such time as a license is obtained.

  During the activation process you will need the serial number for
  your unit. The serial number can be found on the outside of your
  GSC 100 box; on a sticker on the inside of the battery door; on
  the COPYRIGHT screen displayed during start-up; or on the
  ABOUT screen accessed from the GENERAL SETUP menu.
  Also, prior to using the messaging capabilities, you must initialize
  your GSC 100's GPS receiver. This will allow the unit to acquire
  a position and find the ORBCOMM satellites needed to transmit/
  receive GlobalGrams as well as display the ORBCOMM satellite
  schedule.

Magellan GSC 100 Global Satellite Communicator                               3
GETTING STARTED

  Receiver Description

     This section will outline the basic layout of the GSC 100 and the
     functions associated with the various keys.

  Keypad Description
     The GSC 100 keypad consists of four SOFTKEYS, a four-way
     arrow keypad, a POWER key, a LIGHT key, a HOME key, a
     MENU key, an ESCAPE key, an ENTER key and 30
     ALPHANUMERIC keys.
                 GPS Antenna
                 (inside receiver)


         4-way Arrow Keypad


         Softkeys

                                                                      MENU Key
       POWER Key
                                                                   RS-232/NMEA
                                                                   Ext. Power Port

     LIGHT Key
                                                                 HOME Key


  ESCAPE Key
                                                        External GPS Antenna Port


                                                       ENTER Key


                                                      Keypad
ORBCOMM Telescopic Antenna                             (symbols & numbers)
(rotates and extends upward)
(when removed - used as external ORBCOMM antenna port)



 4                     Magellan GSC 100 Global Satellite Communicator
 Softkeys
  There are four softkeys which are located just below the GSC 100
  screen. These softkeys are used to control the operation of the
  unit and provide you with specific options particular to a given
  screen or function. Softkey function designations appear at the
  bottom of the screens and correspond to the options listed. These
  options differ from screen to screen. To execute any option listed,
  press the corresponding softkey.
 Arrow Keys
  The four-way arrow keypad is used to scroll through menu items
  or to move the cursor during alphanumeric entries. When one of
  the arrow directions is pressed, the cursor will continue to move
  until the key is released.
 Power Key
  The Power key turns the unit "ON" or "OFF."
 Light Key
  This key controls the backlights for the screen and keypad.
 Home Key
  The Home key returns the user to the Main Menu screen from any
  function within the unit.
 Menu Key
  The Menu key calls up a menu of available functions relative to
  the current screen display.
 Enter Key
  The Enter key accepts data input and is used to select items from
  menu screens.




Magellan GSC 100 Global Satellite Communicator                      5
Escape Key
    The Escape key is used to cancel the last executed action. For
    example, if pressing the Enter key from a menu allows the user to
    view Satellite Status, then pressing the Escape key immediately
    after the Enter key will return the user to the previous screen.
Alphanumeric Keys
    The Alphanumeric keys are labeled with two characters each.




    Primary characters are the letters and secondary characters are
    numbers and symbols located in the upper right corner of the
    keys. To access the secondary characters, press the ALT key and
    then press the key containing the number or symbol that you wish
    to use. To type capital letters you must have the CAPS key
    depressed prior to pressing the key. Both the ALT and CAPS
    keys are toggle keys so you will have to press them again to de-
    activate them. To access symbols that are not found on any of the
    keys, press the ALT key and then the SYM key which is the
    symbol key when in the ALT mode. A symbol pop-up menu will
    appear allowing you to move through it using the ARROW
    keypad. When you find the
    symbol you wish to use, highlight       POS TIME DATE
    it, press ENTER and it will be                    ;       #
                                              ,                ^
    inserted where the cursor is                     "
                                              _
    positioned. Within the SYMBOLS
                                                      [        ]
    MENU there is also an option to           ~       <       >
    include the TIME, DATE or

6                 Magellan GSC 100 Global Satellite Communicator
  Position (POS) into your GlobalGram. The POS information is
  your last calculated GPS coordinates, including time, date and
  datum stamp. This information can be edited within the message.

 Installing the Battery

  The GSC 100 runs on either external power or battery power.

         Prior to using your GSC 100 you should open the battery door,
         make sure the battery pack is connected and then apply external
         power to charge the battery, as it ships uncharged.

  The unit uses one 9.6 VDC Rechargeable NiCad Battery Pack
  installed in the snap-open back panel.


     Press down when connecting or disconnecting the two clips

                                                                 GSC 100
                                                                 Battery Clip
                               GSC 100 Battery Clip
          Battery Pack Clip




                                                                      Battery Pack
                       Battery Pack                                   Clip




                       Battery Door
                       Latch                                                         Battery Door


     To install the battery pack, turn the GSC 100 on its face,
     making sure to protect the screen and keypad. Using a finger,
     push the battery door latch, shown above, downward. Holding
     the battery door from both sides, open it towards you. Stretch

Magellan GSC 100 Global Satellite Communicator                                                  7
      out the battery pack and release the snap on the side of the
      battery pack clip, shown above. Pull the GSC 100 and the
      battery pack clips apart. You will have up to fifteen minutes to
      replace the battery before internal memory (messages,
      addresses, waypoints and routes) is lost. Take a replacement
      NiCad battery pack, available from Magellan, and clip it onto
      the GSC 100 battery clip and close the battery door.

Charging the Battery

    When the battery is low, depicted by the low battery icon shown
    in the status bar, you will need to recharge it for further use. To
    charge the 9.6 VDC Rechargeable NiCad Battery Pack, supplied
    with your GSC 100, you will need to connect the data power
    extension cable to the RS-232/Power port located on the side of
    the unit. Then connect the AC power cable into the data power
    extension cable and plug into external power. You will be able to
    operate the unit while the battery is charging although it will take
    longer to charge. It is recommended that you charge the battery
    while you are not using your unit to assure that the battery pack
    gets fully charged. It will take 6 hours of un-interrupted charging
    to fully recharge the battery pack.




          It is imperative that, when connecting external power to your
          GSC 100, the connectors are properly aligned so as not to
          damage the pins.


8                  Magellan GSC 100 Global Satellite Communicator
       Only the Magellan-supplied 9.6 VDC Rechargeable NiCad
       Battery Pack will work with your GSC 100. Do not attempt to
       use any other batteries as they may not work with your unit and
       any damage caused by their use will void the warranty.


 Turning the Receiver "ON" & "OFF"

  To turn the GSC 100 "ON", press the POWER key and wait for
  the unit to scroll through the start-up screens.
  To turn the unit "OFF" press the same POWER key. This will
  start a shutdown sequence that counts down the seconds until the
  unit actually turns "OFF." To immediately turn the receiver
  "OFF" press the POWER key again. This bypasses the
  countdown and the unit turns "OFF" immediately.

 GPS Initialization

  When you are using the unit for the first time, move the unit 300
  or more miles without the unit taking a position fix or perform a
  system reset, you will need to initialize the GSC 100 with the
  current location, elevation, local time and date information. This
  is because the constellation of 24 GPS satellites circling the globe
  are in constant motion and before your receiver can tell you
  where you are, it needs to know roughly where the satellites are,
  relative to itself. It does this with the use of an almanac where it
  has stored in memory a general location, a time and a date. The
  almanac tells the receiver which satellites will be in view. Using
  the location and time you enter, the receiver can quickly find
  satellites and calculate your position sooner. Without
  initialization, the unit will take a longer period of time to provide
  position information or locate GPS or ORBCOMM satellites.




Magellan GSC 100 Global Satellite Communicator                           9
     Upon power-up the unit will scroll
     through three initial ID screens
     stopping on the ATTENTION
     screen. The first screen is the
     MAGELLAN ID screen.

                                              MAGELL AN
     The next screen to be displayed is
     the COPYRIGHT and POWER                   COPYRIGHT 1998
     SOURCE screen.                            MAGELLAN CORP.

                                                    BATTERY
                                                     POWER



     The final screen is the ORBCOMM
     ID screen.

                                                      ORBCOMM




     The ATTENTION screen prompts
                                                 ATTENTION!
     you to initialize the unit prior to     GPS UNINITIALIZED
     further use. By pressing ENTER
                                                PRESS ENTER TO
     you will be brought to the                  INITIALIZE OR
     INITIALIZATION screen where you              ESCAPE TO
                                                   CONTINUE
     will enter your location, time and
     date information. Press ENTER.

       If your unit does not display the ATTENTION screen on power-
       up, go to the SETUP OPTIONS section of this manual for
       further instructions.




10              Magellan GSC 100 Global Satellite Communicator
     The first character in the latitude                         A
                                                                 L
                                                                 T




     line is highlighted, indicating that it         INITIALIZE
     can be edited. Using the City                          00 00.00N
                                                           000 00.00W
     Reference Chart, located in the
     back of this manual, enter the
     coordinates of the city that is
     closest to your location. Use the
     ARROW KEYPAD, or NUMBER
     keys, to enter your latitude and
     press ENTER. This accepts the
     new data and brings up the
                                                                 A

     longitude line. Use the ARROW                               L
                                                                 T



                                                     INITIALIZE
     KEYPAD, or NUMBER keys, to
     enter your longitude and press                        34 00.00N
                                                          118 00.00W
     ENTER. This accepts the new
                                                         +00000 FT
     data and brings up the elevation
     line. If you know your elevation,
     enter it on this line and press
     ENTER. If you do not know your
     elevation, simply press ENTER to
     accept the default value. The
     receiver will now prompt you for                            A
                                                                 L
                                                                 T


     the local time in 12-hour AM/PM                 INITIALIZE
     format. Take extra care to input                       34 00.00N
     the time correctly (to within 10                      118 00.00W
     minutes), including the AM/PM                       +00000 FT
     designator. Use the ARROW                            08:23AM
     KEYS and the numeric keys to
     input the correct time.

       Daylight Savings time does not affect the time in your unit, as
       long as you take a position fix after entering your local time.
       This allows the satellite to correct any time differences.




Magellan GSC 100 Global Satellite Communicator                           11
                                                                   A

        When the time is correct, press                            L
                                                                   T



                                                      INITIALIZE
        ENTER. Your receiver requires
        just one more piece of information,                  34 00.00N
                                                            118 00.00W
        the date. Use the ARROW KEYS
                                                          +00000 FT
        and the numeric keys to input the                  08:23AM
        correct date. Press ENTER.                         02SEP97
        Once you have completed the
        Initialization of the GSC 100 you                               8:23A

        will be brought back to the MAIN              MAIN MENU
                                                     ORBCOMM SATS
        MENU. Time and date will not
                                                   09:01P TO 09:14P
        be displayed if the receiver has           10:21P TO 10:35P
        already acquired a satellite and             UNREAD MSGS 0
        received that information from it.           QUEUED MSGS 0
                                                   MSGS   GPS   SETUP   SATS




Proper Handling - Signal Reception

     Since the GSC 100 receives information it needs from satellites
     orbiting the earth, the antennas need to have a relatively
     unobstructed view of the sky.
     Blocked or Partially Blocked View of
     the Sky. Physical obstructions will
     block satellite signals from reaching the
     receiver, as may be the case with the
     cliffs in the picture. If you are unable to
     get a position fix, send or receive
     messages, move the receiver so it has a
     clearer view of the sky.
                               Clear View of the Sky. The receiver
                               now has a clear view of the sky in all
                               directions, allowing it to choose from all
                               of the satellites currently available. Do
                               not attempt to use the unit in metal or
                               concrete structures as the signals will be
                               obstructed.

12                  Magellan GSC 100 Global Satellite Communicator
        Due to the extension capability of the ORBCOMM telescopic
        antenna located on the GSC 100, it is strongly advised that
        operations of the GSC 100 cease when thunderstorm or
        electrical storm conditions are present.

  The GSC 100 is designed to fit in your hand. The unit can also be
  mounted in a stand that can be purchased from your local GSC
  100 dealer. Hold the receiver with the antenna extended upwards
  toward the sky and the unit comfortably in your hand and slightly
  away from your body so that you can see the screen.


       If you are sending or receiving GlobalGrams, the telescopic
       antenna, located on the side of the unit, needs to be fully
       extended. If you are using the unit to navigate, you do not
       need to extend the telescopic antenna.



       Best reception will occur when the unit is operated away from
       noise sources such as high voltage power lines and older
       internal combustion engines. If your unit is experiencing
       difficulty in establishing contact with satellites, move away
       from any such noise sources that may be present. Also, due to
       the radiation pattern of the ORBCOMM telescopic antenna, you
       may have better transmission quality if the antenna is held at an
       angle to the transmitting ORBCOMM satellite.



       Do NOT place metallic decals or labels over the antenna portion
       of the receiver. Drastic reductions in signal levels can
       significantly decrease the GSC 100's signal reception.




Magellan GSC 100 Global Satellite Communicator                             13
System (SYS) Modes

     This section outlines the different modes of operation used in the
     GSC 100. There are three system, or operating, modes: AUTO
     MODE, GPS MODE and ORBCOMM MODE.

GPS Mode
     The GPS mode should be engaged when the NMEA port is in use,
     for external marine products or an autopilot, where a constantly
     updated position fix is necessary. All other GPS functions can be
     utilized while in the AUTO mode. The unit will not transmit or
     receive messages while in this mode. In GPS mode, if your
     receiver is not communicating with a GPS satellite and your time
     and postion coordinates are incorrect, your ORBCOMM satellite
     pass schedule will be inaccurate.

ORBCOMM Mode
     When in the ORBCOMM mode, your receiver will continuously
     listen for ORBCOMM satellites regardless of the satellite
     schedule. ORBCOMM mode should be used when it is
     imperative that you send or receive GlobalGrams. If there is a
     scheduled pass at a certain time and you have a GlobalGram you
     need to send, or a GlobalGram you are expecting to receive, you
     would engage the ORBCOMM mode to ensure delivery or receipt
     of these messages. While in ORBCOMM mode, position
     information and satellite schedule are based on the last calculated
     satellite fix. GPS or AUTO modes need to be engaged to
     continuously update the position of your receiver.

AUTO Mode
     The AUTO mode is the default operational mode as well as the
     recommended mode of operation. In AUTO mode, if you do not
     have any GlobalGrams queued or are not requesting messages,
     the unit will operate in GPS mode. If an ORBCOMM satellite
     comes into view and you have a GlobalGram queued, or have


14                 Magellan GSC 100 Global Satellite Communicator
  activated the request messages function, the GSC 100 will
  automatically switch to ORBCOMM mode, perform the
  necessary transmit/receive functions, then switch back to the GPS
  mode after complete or when the ORBCOMM satellite is no
  longer in view. The mode icon will change between current
  operational modes as operation dictates. You will be able to use
  the ORBCOMM functions and still allow the unit to update
  important position information needed to generate ORBCOMM
  satellite schedules. Conversely, in AUTO mode, if your receiver
  is not communicating with a GPS satellite and your time and
  postion coordinates are incorrect, your ORBCOMM satellite pass
  schedule will be inaccurate.

 Creating a GlobalGram

  With your GSC 100 you have the ability to send and receive e-
  mail-type messages, or GlobalGrams, from anywhere in the
  world. In order to transmit a GlobalGram your unit must
  have a clear view of the sky and the ORBCOMM antenna
  must be fully extended and your unit in either ORBCOMM or
  AUTO mode. This section helps you get started sending
  GlobalGrams with your GSC 100. The REFERENCE section of
  this manual contains greater detail.

        Before you can use the ORBCOMM messaging functions, you
        must first complete the Activation Procedures using the
        Activation Instructions that came with your GSC 100. If you
        have not received these Activation Instructions, contact
        Magellan Customer Service at (800) 707-9971.




Magellan GSC 100 Global Satellite Communicator                        15
     A STORE & FWD GlobalGram is sent when your GSC 100 is
     transmitting to an ORBCOMM satellite that is not in direct
     communication with an ORBCOMM Ground Earth Station.
     This will be reflected by the presence of a broken double arrow
     icon displayed in the status bar at the top of the screen when
     you are outdoors and a satellite is in view. You can only send a
     STORE & FWD GlobalGram to one speed dial address. See
     the REFERENCE section for message constraints, as well as
     instructions on SENDING STORE & FWD
     GLOBALGRAMS.
                          STORE & FORWARD GLOBALGRAM SEQUENCE
                                    C                                                                                                   C                                                 C
            OR                                              OR                   C                                 OR                                                   OR
                    B
                                    A
                                    P     1:32P                  B               A
                                                                                 P            1:33P                     B
                                                                                                                                        A
                                                                                                                                        P           1:34P                    B
                                                                                                                                                                                          A
                                                                                                                                                                                          P           1:35P
      TO:                                                  Don Smith                                     TO:                                                      TEXT:
                                                     5     SPEED DIAL                     1              SPEED DIAL 1
                    PRESS ADBK
                     TO SELECT                       2     SPEED DIAL                     2
                     RECIPIENT                       3     SPEED DIAL                     3
                                                     4     SPEED DIAL                     4
                                                     5     SPEED DIAL                     5
      TEXT              ADBK    SAVE     SEND        SELCT           DESEL       DONE                        TEXT           ADBK       SAVE    SEND                TO                    SAVE        SEND




                                                                                                                                                                                      TO MAILBOX
                                                                                                                                                                                   FOR TRANSMISSION
                                                                                                                                                                                   AT NEXT SAT PASS


     A STANDARD GlobalGram is sent when your GSC 100 is
     transmitting to an ORBCOMM satellite that is in direct
     communication with an ORBCOMM Ground Earth Station.
     This will be reflected by the presence of a double arrow icon
     displayed in the status bar at the top of the screen. For a
     complete description of all the icons displayed in the status
     bar, please refer to the ICONS section of this manual. You
     have the ability to send a STANDARD GlobalGram to seven
     recipients maximum, both primary and carbon-copy recipients
     combined.

                                        STANDARD GLOBALGRAM SEQUENCE
                                C                         GP                 C                                                     C                                               C
           OR                                                                                                GP                                                   GP
                B
                                A
                                P       12:19P              S                A
                                                                             P          1:11P                  S
                                                                                                                                   A
                                                                                                                                   P        1:13P                   S
                                                                                                                                                                                   A
                                                                                                                                                                                   P          1:15P
     TO:                                          CC TO:                                              SUBJECT:                                              TEXT:
     Don Smith,




      CC            ADBK       SAVE     SEND       SUBJ         ADBK    SAVE         SEND             TEXT                    SAVE          SEND             TO                   SAVE        SEND




                                                                                                                                                                                    TO MAILBOX
                                                                                                                                                                                 FOR TRANSMISSION
                                                                                                                                                                                 AT NEXT SAT PASS




16                                             Magellan GSC 100 Global Satellite Communicator
     To compose and send a                  Status Bar
     GlobalGram, press the MSGS                          OR
                                                              B                  1:07P

     softkey from the MAIN MENU.                MESSAGE TYPE
     You are now at the MESSAGE
     LIST, where you will press the                      STANDARD
                                                         STORE & FWD
     NEW softkey. You will be
     prompted to send either a
     STANDARD GlobalGram or a
     STORE & FWD GlobalGram.
     If you are sending a GlobalGram to                  OR
                                                              B 1:10P
                                                                          C
                                                                          A
                                                                          P




     a recipient who's address you do         TO:
     not have stored at the GCC, your         Don Smith,
     choice will be STANDARD. Use
     the UP/DOWN ARROWs to
     highlight STANDARD and press
     ENTER. You are now at the TO               CC ADBK   SAVE SEND

     screen where you will manually
     enter the address of the recipient using the
     ALPHANUMERIC KEYS. Your GSC 100 also contains an
     address book where you can store your frequently used
     addresses. To create your address book, refer to the
     REFERENCE section of this manual for more details.
     You can move the cursor within these screens using the 4-
     way arrow keypad.
                                                          GP              C

     Once you are back at the TO                            S             A
                                                                          P     1:11P

     screen, press the CC softkey. Press      CC TO:
     this key even if you do not have
     any carbon-copy recipients
     because, from the CC screen, you
     access the SUBJECT screen. Enter
     the carbon-copy recipients using          SUBJ               ADBK   SAVE   SEND


     the same procedures as were used
     for the TO screen.



Magellan GSC 100 Global Satellite Communicator                                     17
     Press the SUBJ softkey to enter the             GP
                                                       S
                                                            C
                                                            A
                                                            P     1:13P

     SUBJECT screen of this message.          SUBJECT:
     After entering the subject of your
     message, using the
     ALPHANUMERIC KEYS, press
     the TEXT softkey. This brings you
     to the TEXT screen, where you will       TEXT         SAVE   SEND

     enter the text of your message. You             GP
                                                       S
                                                            C
                                                            A
                                                            P     1:15P
     have a 2000 character text screen        TEXT:
     limit for STANDARD
     GlobalGrams and a 229 character
     text limit for STORE & FWD
     GlobalGrams. Use the
     ALPHANUMERIC KEYS to                      TO          SAVE   SEND
     enter your message and press the
     SEND softkey.

Sending a GlobalGram

     After you have pressed the SEND softkey, your message is
     SENT to the MAILBOX, where it is stored, to be transmitted to
     an ORBCOMM satellite at the next satellite pass. To transmit
     this message you must be outdoors, away from any
     obstructions, with the unit held away from your body and
     the ORBCOMM antenna fully extended. Your unit must
     be in either AUTO or ORBCOMM mode in order to
     transmit to an ORBCOMM satellite.
     At the top of the screen in your unit will be a mailbox icon
     with the flag in the up position. This alerts you that the
     message has been sent to the MAILBOX to be transmitted at
     the next satellite pass. Once the message has been transmitted
     to the satellite, this icon will disappear and be replaced in the
     MESSAGE LIST by the mailbox icon with the flag in the down
     position.


18               Magellan GSC 100 Global Satellite Communicator
     You have the ability to monitor ORBCOMM satellite activity
     from the SAT STATUS screen.
     From the MAIN MENU, press the                                         OR
                                                                                   B            4:17P

     SATS softkey. You are now at the               ORBCOMM SATS
                                                                                                   7
                                                                                                   A
                                                                                                    Z    m
     ORBCOMM SATS screen, showing                                          N
                                                                                                   2
                                                                                                   4
                                                                                                         EL
                                                                                                         I
                                                                                                           D

     the location of the ORBCOMM
     satellite being utilized as well as its
     azimuth and elevation. On the left
     side of the screen is a signal                         1            2 CLOCK GPS
     strength bar showing that satellite's
                                                                 Satellite Being
     strength. The more the bar is filled,                       Tracked         Satellite ID#
     the better transmission you are              User Location
     getting. Also, below the satellite                                   OR
                                                                               B               4:17P
     strength bar is both the closed               ORBCOMM SATS
                                                                                                7A
     envelope and mailbox with the flag                                   N
                                                                                                2
                                                                                                   Z    m
                                                                                                        EL

                                                                                                 4      I
     in the up position icons. Next to                                                                    D




     these icons will be a number
     showing how many unread
     GlobalGrams you have and how                          1           2 CLOCK GPS
     many GlobalGrams have been sent
     to the MAILBOX for transmission. Satellite
     When there is no ORBCOMM                 Strength Bar                                  Satellite Track
     satellite in view, this screen lists the              Messages Messages
                                                           Received To Be Sent
     time of the next pass.
     For further details regarding the SAT STATUS screen, refer to
     the ADDITIONAL FEATURES section of this manual.




Magellan GSC 100 Global Satellite Communicator                                                              19
Receiving a GlobalGram

     In order for you to receive a GlobalGram with your GSC 100, you
     must request your unit to check for messages. Your unit must be
     in either AUTO or ORBCOMM mode, with a clear view of the
     sky and the ORBCOMM antenna fully extended, in order to
     receive a transmission from an ORBCOMM satellite.
       To receive GlobalGrams from a                     OR
                                                                 B       12:50P

       satellite you must first request your       Flight Informa
                                                  CMHeeEtC inKg Mch SaG nS ge
       unit to CHECK MESSAGES. Do                 M  A0 It
                                                         L0 B OyX       n
       this by pressing the MNU key from           B0o a    K 0
                                                              e  0s  0  M
                                                  CLaOt N
                                                        eT  AR A
                                                              rr  Sa
                                                                 iv  Tl
       the MAIN MENU or the MESSAGE               S  Y S   M  O  D  E
                                                   Rental Car
       LIST, which will bring up a pop-up
                                                   Party Arrangem
       menu with the options of CHECK            NEW    MSTAT   ADBK     DEL

       MSGS, MAILBOX, CONTRAST                          OR
                                                                         12:51P
       or SYS MODE. Use the UP/                              B


                                                   Flight Informa
       DOWN ARROWs to highlight                    Meeting change
       CHECK MSGS and press ENTER.                 Boat Keys
       This sends a request to the satellite       Late Arrival
       for any messages it may have                Rental Car
       received. Your GSC 100 will send            Party Arrangem
                                                 NEW    MSTAT   ADBK      DEL
       all queued messages prior to
       checking for any incoming messages. When you are
       receiving a transmission from a satellite, a double arrow icon
       will be displayed at the top of your screen. Any attachments to
       incoming GlobalGrams will be stripped out prior to receipt.
       Upon receipt of a GlobalGram, an envelope icon will appear at
       the top of the screen. To view this message, return to the
       MESSAGE LIST by pressing the MSGS softkey while at the
       MAIN MENU. The message you received will be preceded by
       the envelope icon. Use the UP/DOWN ARROWs to highlight
       the message and press ENTER. This opens up the message for
       you to read and changes the icon in front of it to an open
       envelope icon, while the envelope icon on the top of the screen
       disappears. Use the UP/DOWN ARROWs to scroll through
       the message.

20                  Magellan GSC 100 Global Satellite Communicator
 Your First Position Fix

  In order for your GSC 100 to display accurate navigation
  information, as well as the ORBCOMM satellite pass schedule, it
  must first get a position fix. This position fix allows the unit to
  locate itself, on the earth, relative to the location of both GPS and
  ORBCOMM satellites. To get a position fix with your GSC 100
  receiver, you must be outside with a clear view of the sky and
  away from any large obstructions (buildings, large trees, etc.).
     If your receiver is OFF, press the POWER key to turn the
     receiver ON, or if you have just finished initializing the unit,
     press the HOME key to go to the MAIN MENU. Your unit
     needs to be in GPS or AUTO mode to get a fix. Press the
     GPS softkey and then the NAV softkey and then your unit will
     display one of the NAV or PLOT screens. Press the UP/
     DOWN ARROW until you get to the POSITION screen. You
     may also press the NAV softkey until the position screen is
     displayed.
     The POSITION screen appears with            GP
                                                   S                   1:26A

     the latitude, longitude and elevation             LAT/LON
                                                        34 00.00N
     that you entered during
     INITIALIZATION. The word                          118 00.00W
     "SEARCHING" appears,                                     900 FT
                                                       SEARCHING
     indicating that the receiver is
     searching the sky for satellites. In a    NAV     PLOT   GOTO    AUX

     short period of time, the receiver
                                                 GP
     will locate the satellites and begin          S                   1:31P
                                                       LAT/LON
     receiving information. The first
                                                        34 00.00N
     indication of this is that the word
                                                       118 00.00W
     "SEARCHING" is replaced with a
                                                              900 FT
     bar graph indicating the receiver's
     progress toward acquiring GPS
     data from the satellites.                 NAV     PLOT    GOTO    AUX




Magellan GSC 100 Global Satellite Communicator                            21
       Within a few minutes, the bar graph        GP
                                                    S
                                                        2
                                                            d                   1:33P

       will disappear and be replaced with              LAT/LON
       the map datum. This indicates that                34 06.58N
                                                        117 49.54W
       your receiver has computed your
       present position. All position and                              900 FT
       navigation information will now                                   WGS84
       be based on the position                 NAV             PLOT   GOTO    AUX

       information received.

Saving Your First Waypoint

     You now have a position fix that defines your current location.
     During GPS operation, your receiver continuously computes your
     position and displays that information on the POSITION screen.
     You can save this position in the receiver's memory for later use.
     This stored fix is referred to as a waypoint. A useful way to
     record this would be to assign a unique name to the position.
     That way, if you were to go to a new location, you could use your
     receiver to guide you back to the previous location.
       From the POSITION screen, press
       MNU which will bring up a list of              SAVE POS
       options. Using the UP/DOWN                     CREATE WPT
       ARROWs highlight SAVE POS                      ROUTE MENU
       and press ENTER. This tells the                CONTRAST
                                                      WPT PROJEC
       receiver that you want to store the
                                                      SYS MODE
       current position as a waypoint. The
       cursor is in the upper left corner,        GP    2                 C
                                                    S       d             A
                                                                          P     1:26P
       and the arrows icon displayed at the             SAVE POS
       top of the screen lets you know that
       you are in the edit mode. Also, the               34 11.00N
       CAPS mode is automatically                       119 43.02W
       enabled as the entry will be made                    900 FT
       using capital letters. Now, name
                                                NAV             PLOT    GOTO    AUX
       this position.


22                 Magellan GSC 100 Global Satellite Communicator
  The waypoint name can be created by the receiver or you can
  input a name that means something to you. If you press ENTER
  without creating a name, the receiver automatically assigns a
  waypoint name. Waypoint names, assigned by the receiver,
  appear in the format WPxxx, where the xxx is a sequential
  number (001, 002, etc.). Unless you select a different icon, by
  pressing the UP/DOWN ARROW, receiver-generated waypoint
  names use the pin icon.
                                                                           C
                                                   GP    2
                                                                               1:54P
     To allow the receiver to name the
                                                                           A
                                                     S       d             P



                                                       SAVE POS
     waypoint, press ENTER. The                  WP001
     screen to the right will appear                 34 11.00N
     briefly and then the receiver returns          119 43.02W
     to the POSITION screen.                       900 FT
                                                 01:54P02SEP97
                                                 NAV             PLOT   GOTO   AUX




  All waypoint names begin with an icon. You have the option of
  choosing one of nine different icons plus one unit-generated icon,
  shown below.
  AVAILABLE ICONS:
  a square:                        a target:
  a double box:                    a fish:
  a diamond:                       a diving symbol:
  a left flag:                     an anchor:
  a right flag:                    a pin:      (unit-generated icon)
  These icons will be used to display the relative location of the
  waypoint on the PLOT, POINTER and ROAD screens.
  Now you will save your position, but this time you will assign a
  name to the waypoint.




Magellan GSC 100 Global Satellite Communicator                                   23
     Press MNU, highlight SAVE POS               GP
                                                   S
                                                       2
                                                           d                 1:33P

     and press ENTER. Select an icon                   LAT/LON
                                                SAVE POS
     by pressing the UP/DOWN                         2 4 WPT
                                                CREATE   00.00                  N
                                                   1 1 8MENU
                                                ROUTE    00.00                  W
     ARROW.
                                                CONTRAST
                                                      900 FT
                                                WPT PROJEC
                                                         WGS84
                                                SYS MODE
                                               NAV             PLOT   GOTO   AUX




        Selecting CREATE WPT instead of SAVE POS will allow you to
        enter a waypoint exactly as described above with the additional
        option of entering the latitude, longitude and elevation of the
        position. (See Creating Waypoints)

     After you have selected an icon for         GP
                                                   S
                                                       2
                                                           d
                                                                        C
                                                                        A
                                                                        P    1:54P

     this waypoint, use the ARROW or                 SAVE POS
                                                DO
     ALPHANUMERIC keys to enter
     the name that will be associated                    34 11.00N
                                                       119 43.02W
     with this waypoint. This name will
                                                       900 FT
     be used to distinguish this waypoint
     from others you will create.              NAV             PLOT   GOTO   AUX




     When done, press ENTER. That
                                                                         C
                                                 GP    2
                                                   S       d
                                                                         A
                                                                         P   1:54P

     position has now been saved as                  SAVE POS
                                                DOCK
     your first waypoint with the name
                                                    34 11.00N
     you have assigned. You are now               119 43.02W
     returned to the last viewed NAV or           900 FT
     PLOT screen.                               01:54P02SEP97
                                               NAV             PLOT   GOTO   AUX




24              Magellan GSC 100 Global Satellite Communicator
 Creating a GOTO

  In this section, you will create a GOTO route to the waypoint that
  you just created. A GOTO is a direct line from your current
  position to any waypoint you have saved in memory.
     To create a GOTO to the waypoint you just created, press the
     GOTO softkey. This will bring up the GOTO screen where
     you will use the UP/DOWN ARROWs to highlight the
     waypoint you just saved and press ENTER. You have now
     created a GOTO to the landmark named DOCK, setup in the
     preceding section. Your GSC 100 returns to the last viewed
     NAV screen and immediately begins computing the
     information you need to get to DOCK, no matter where you
     are. As you travel towards that position you will see the
     information on the NAV1 and NAV2 screens showing you your
     distance from that position.

        It is necessary to have a current position fix in order for the
        receiver to compute navigation information. If you do not have a
        position fix, the navigation information will be displayed with
        dashes until a position fix is acquired.


 Navigating with the GSC 100

  The GSC 100 has six different screens that provide you with
  information that you can use to navigate by; The POSITION,
  NAV 1, NAV 2, POINTER, PLOTTER and ROAD screens.
     Press the NAV softkey and use the UP/DOWN ARROWs to
     cycle through the three screens showing navigation
     information. If you press the PLOT softkey and use the UP/
     DOWN ARROWs you will be able to cycle through an
     additional three screens that graphically direct you towards
     your desired destination.


Magellan GSC 100 Global Satellite Communicator                        25
REFERENCE

     This section explains the various functions of your receiver as
     used in both the ORBCOMM and GPS modes and is organized in
     this order. Functions are listed in order of usage and are
     accompanied by screen representations and keystroke diagrams.

General Usage

     The GSC 100 is used as an ORBCOMM Transceiver allowing
     you to create, receive, forward and delete GlobalGrams that are
     sent via ORBCOMM satellites from anywhere in the world. In
     ORBCOMM mode, GlobalGrams can be created and sent, edited,
     received, forwarded, copied, replied to and deleted. You will also
     be able to attach important GPS position information to the
     messages, including the time and date. It is also used as a GPS
     Receiver computing position fixes, which are stored as named
     waypoints and used to create routes. In GPS mode, waypoints
     can be viewed, edited, and projected to create new waypoints, or
     deleted. Routes can be created, activated, deactivated, reversed,
     edited and cleared. This section covers these and other functions
     which will enable you to take full advantage of your receiver's
     dual capabilities.

Turning the Receiver ON
     To turn the receiver "ON", press the POWER key. If
                                                                PWR
     the batteries are installed correctly or the external
     power is properly connected, the Magellan, Copyright
     and ORBCOMM screens will quickly flash on the
     screen, followed by the MAIN MENU.
     If these screens do not appear, please check that the battery
     installation and/or external power is properly connected and
     turned "ON."

26                 Magellan GSC 100 Global Satellite Communicator
 Turning the Receiver OFF
  To turn the receiver "OFF", press the POWER key.
  The POWER DOWN screen is displayed for five                 PWR
  seconds. Pressing the POWER key again before the
  counter reaches 1 will cause the receiver to turn
  "OFF" immediately; pressing any other key will stop
  the receiver from turning "OFF."

 Inputting Data
  The UP/DOWN and LEFT/RIGHT
  ARROWs have two functions depending on
  how the ARROW ICONS are displayed in the
  top right corner of the various screens, next to
  the time.
  Some screens use the UP/DOWN and LEFT/RIGHT ARROWs
  to access additional pages, while on other screens they allow you
  to input data, such as waypoint names or coordinates, or to select
  menu items. You will also be able to move the cursor within the
  text field while CREATING A MESSAGE."
  The ARROW ICONS in the status line indicate which mode is
  currently being used. Whenever there are additional screens to
  view from the one displayed, the receiver shows UP/DOWN
  ARROW icon in the upper right corner of the display.

 Turning the Light ON and OFF
  To activate the display light, press the LIGHT key.
  To deactivate the display light, press the LIGHT key
  again.
  The receiver will indicate that the light is "ON" with a
  light bulb icon in the status line to the left of the
  arrow icons.
  Use of the display light causes an increase in battery drain
  resulting in shorter battery life. See the Specifications section of
  this manual for the approximate battery life.


Magellan GSC 100 Global Satellite Communicator                      27
The Main Menu
     Once the unit has scrolled through the start-up screens, the MAIN
     MENU will be displayed. This is where you will access
     messaging functions, GPS functions, setup parameters or satellite
     status information. These are accessed through the softkey
     options of MSGS, GPS, SETUP and SATS. This screen also lists
     the next two ORBCOMM satellite passes as well as alerting you
     to the number of UNREAD and QUEUED messages. Unread
     messages are GlobalGrams that have been received but not
     opened or read and are depicted by the envelope icon. Queued
     messages are GlobalGrams that have been sent to the MAILBOX
     to be transmitted during the next available ORBCOMM satellite
     pass. They are depicted by the mailbox with the flag in the up
     position icon. You may also access the MAIN MENU from
     anywhere in the unit by pressing the HOME key.

                                                     Operating Mode Icon               Current Time
                       Status Bar
                                                    GP
                                                      S                             10:30A
                                                   MAIN MENU
      ORBCOMM Satellite Schedule                ORBCOMM SATS
                                            0 8 : 11 P T O 0 8 : 1 6 P
                                            09:01P TO 09:14P                                                # of Unread Messages
                                               UNREAD MSGS 0
                                               QUEUED MSGS 0
                                             MSGS         GPS        SETUP          SATS
                                                                                                           # of Messages awaiting
                                                                                                           transmission




                      Messaging Functions GPS/Navigating Functions         Setup Parameters   Satellite Status

     Additional ORBCOMM satellite pass times can be found on the
     ORBCOMM SAT STATUS screen To access this screen please
     refer to "VIEWING ORBCOMM SAT STATUS SCREN"
     located in the ADDITIONAL FEATURES section of this
     manual.



28                              Magellan GSC 100 Global Satellite Communicator
 System (SYS) Modes

  This section outlines the different modes of operation used in the
  GSC 100. There are three system, or operating, modes: AUTO
  MODE, GPS MODE and ORBCOMM MODE.

 GPS Mode
  The GPS mode should be engaged when the NMEA port is in use,
  for external marine products or an autopilot, where a constantly
  updated position fix is necessary. All other GPS functions can be
  utilized while in the AUTO mode. The unit will not transmit or
  receive messages while in this mode. In GPS mode, if your
  receiver is not communicating with a GPS satellite and your time
  and postion coordinates are incorrect, your ORBCOMM satellite
  pass schedule will be inaccurate.

 ORBCOMM Mode
  When in the ORBCOMM mode, your receiver will continuously
  listen for ORBCOMM satellites regardless of the satellite
  schedule. ORBCOMM mode should be used when it is
  imperative that you are able to send or receive GlobalGrams. If
  there is a scheduled pass at a certain time and you have a
  GlobalGram you need to send, or a GlobalGram you are
  expecting to receive, you would engage the ORBCOMM mode to
  ensure delivery or receipt of these messages. While in
  ORBCOMM mode, position information and satellite schedule
  are based on the last calculated satellite fix. GPS or AUTO
  modes need to be engaged to continuously update the position of
  your receiver.

 AUTO Mode
  The AUTO mode is the default operational mode as well as the
  recommended mode of operation. In AUTO mode, if you do not
  have any GlobalGrams queued or are not requesting messages,
  the unit will operate in GPS mode. If an ORBCOMM satellite
  comes into view and you have a GlobalGram queued, or have

Magellan GSC 100 Global Satellite Communicator                    29
     activated the request messages function, the GSC 100 will
     automatically switch to ORBCOMM mode, perform the
     necessary transmit/receive functions, then switch back to the GPS
     mode after complete or when the ORBCOMM satellite is no
     longer in view. The mode icon will change between current
     operational modes as operation dictates. You will be able to use
     the ORBCOMM functions and still allow the unit to update
     important position information needed to generate ORBCOMM
     satellite schedules. Conversely, in AUTO mode, if your receiver
     is not communicating with a GPS satellite and your time and
     postion coordinates are incorrect, your ORBCOMM satellite pass
     schedule will be inaccurate.

Messaging Operations

     This section aids in the setup and operation of the Messaging
     portion of your GSC 100.

Selecting ORBCOMM Mode
     Although it is recommended that you operate your GSC 100 in
     AUTO mode, there are times when you will need to operate
     solely in ORBCOMM mode. To select ORBCOMM mode
     complete the following steps:
       While in the MAIN MENU, press                                 10:26A

       the MNU key. This brings up a               MAIN MENU
       pop-up menu with the options of            C  HECK M
                                                  ORBCOMM        SGS
                                                                SATS
       CONTRAST and SYS MODE.                  0 8M
                                                  :01A I L0
                                                      10
                                                       P   B
                                                           T0OX
                                                             O 00 8
                                                                  0:n
                                                                    M
                                                                     16P
                                               0 9C
                                                  :0 O1N
                                                       P TT ROAS09T: 1 4 P
       Using the UP/DOWN ARROWs,                  UNREAD      MSGS       0
                                                  S  YS MO     DE
       highlight SYS MODE and press              QUEUED MSGS            0
       ENTER.                                  MSGS    GPS   SETUP   SATS




30                 Magellan GSC 100 Global Satellite Communicator
     You are now at the SYSTEM                                       10:28A

     MODE screen where you will use           SYSTEM MODE
                                             AUTO MODE
     the UP/DOWN ARROWs to                   GPS MODE
     highlight ORBCOMM MODE and              ORBCOMM MODE
     press ENTER.


                                                 GP
     This activates the ORBCOMM                    S                 10:30A
                                                 MAIN MENU
     Mode and returns you to the MAIN            ORBCOMM SATS
     MENU with the ORBCOMM                   0 8 : 11 P T O 0 8 : 1 6 P
     identifier in the status bar. You can   09:01P TO 09:14P
     now transmit and receive                   UNREAD MSGS 0
     GlobalGrams while outdoors, away           QUEUED MSGS 0
     from any obstructions, during an        MSGS      GPS   SETUP   SATS

     ORBCOMM satellite pass.


 Initialization
  If not already done in the activation process, the final step to
  begin using your GSC 100 messaging functions is to choose your
  Preferred Gateway Control Center. The GCC will be responsible
  for routing your messages through ORBCOMM, as well as billing
  issues. Entering the ID of the GCC that you will be using ensures
  that your messages will automatically be routed through that
  GCC then forwarded through ORBCOMM. The GSC 100 will
  default to the US GCC, which is 001. It is recommended that you
  complete the following procedures to make sure that 001 is the
  GCC chosen. For users registering outside the US, check with
  your service provider to obtain the correct GCC ID.
  Additional information is contained in the Activation
  Instructions.




Magellan GSC 100 Global Satellite Communicator                          31
Preferred Gateway Control Center (GCC)
     This function allows you to input the Primary GCC that you will
     be registered with, to send and receive GlobalGrams.
       From the MAIN MENU, proceed to                  OR
                                                            B            10:31A

       the SETUP MENU by pressing the               ORBCOMM SETUP
                                                    GCC ID
       SETUP softkey. Using the UP/                 DEFAULT CHAR
       DOWN ARROWs, highlight                       FONT SIZE
       ORBCOMM SETUP and press                      DISPLAY CHARS
                                                    AUTO MSG CHEK
       ENTER. This will bring you to the
       ORBCOMM SETUP MENU, where
       you will highlight GCC ID and
       press ENTER.
       You will now be at the                           OR
                                                             B
                                                                    A
                                                                    L
                                                                    T    10:33A

       PREFERRED GCC screen where                   PREFERRED GCC
       you will enter the ID of the
       Gateway Control Center that you              ENTER GCC ID 001
       will be utilizing. The GCC ID for
       the US is 001. After inputting the
       ID of your choice, press ENTER,
       which brings up a screen alerting                OR
                                                             B           10:34A

       you that to update the unit with the         PREFERRED GCC
       GCC ID you have just entered the                PRESS ENT TO
                                                         ACTIVATE
       unit will reboot. Press ENTER to                   GCC ID
       continue or ESC to cancel the                   SYSTEM WILL
                                                          REBOOT
       action and return to the previous
       screen.                                        ESC TO CANCEL




          If you clear your GSC 100's memory, or perform a hardware
          reset, the unit will not be reset to a default GCC ID. The last ID
          you entered will remain as the PREFERRED GCC ID.




32                  Magellan GSC 100 Global Satellite Communicator
 Default Characters
  This function allows you to choose the default character set that
  will be used when inputting information and creating
  GlobalGrams. You will have the choice of upper or lower case
  with the initial factory setting being upper case. When creating a
  GlobalGram, you can use the CAPS key to switch between
  UPPER and LOWER case letters.
     Access the ORBCOMM SETUP                   OR
                                                     B       10:36A

     MENU, by pressing the SETUP            D E F AU LT C H A R
                                          UPPER CASE
     softkey from the MAIN MENU, and      LOWER CASE
     use the UP/DOWN ARROWs to
     highlight DEFAULT CHAR and
     press ENTER. You will now be at
     the DEFAULT CHAR screen where
     you will use the UP/DOWN
     ARROWs to highlight either UPPER CASE or LOWER
     CASE. When you have highlighted the setting of your choice,
     press ENTER, which will return you to the ORBCOMM
     SETUP MENU.

 Font Size
  This option allows you to select the font size that will be used to
  display data on various messaging screens. The options available
  are small, medium and large.
                                                OR
                                                       10:39A
     Access the ORBCOMM SETUP                        B


                                             FONT SIZE
     MENU, by pressing the SETUP          LARGE FONT
     softkey from the MAIN MENU, use      MEDIUM FONT
     the UP/DOWN ARROWs to                SMALL FONT
     highlight FONT SIZE and press
     ENTER. This will bring you to the
     FONT SIZE screen where you will
     have the options of small, medium
     and large. Use the UP/DOWN ARROWs to highlight the size
     you prefer and press ENTER, returning you to the
     ORBCOMM SETUP MENU.

Magellan GSC 100 Global Satellite Communicator                    33
Display Characters Setting
     This setting allows you to view the spaces and carriage returns
     that are present in messages that you are sending or have
     received. Because messaging costs are based on the number of
     characters, this feature allows you to see exactly how many
     characters are being used in a message. Spaces are represented
     by dots in the middle of line, while carriage returns are
     represented by a paragraph symbol.
     By accessing the DISPLAY CHARS feature you are able to
     SHOW CHARS or HIDE CHARS. By selecting HIDE CHARS,
     which is the default setting, your unit will not display the spaces
     or carriage returns while you are creating, editing or viewing a
     message. When you select SHOW CHARS your unit will show
     the spaces and carriage returns when you are creating, editing or
     viewing a message.
                                                      OR
       Access the ORBCOMM SETUP                            B                    10:41A
                                                 DISPLAY CHARS
       MENU, by pressing the SETUP
                                                 SHOW CHARS
       softkey from the MAIN MENU, and           HIDE CHARS
       use the UP/DOWN ARROWs to
       highlight DISPLAY CHARS and
       press ENTER. You will be
       brought to the DISPLAY CHARS
       screen where you will use the UP/
       DOWN ARROWs to highlight
       either SHOW CHARS or HIDE                           OR        C
                                                                B
                                                                     A
                                                                                1:49P
       CHARS. When you have                      TEXT:
                                                                     P




       highlighted the desired setting,          The meeting is now
       press ENTER. This will accept the             @ 9AM in Room #4. 
                                                 
       setting you have chosen and return        I'll call you       if    it
       you to the ORBCOMM SETUP                  changes.
       MENU with the next line
                                                     TO             SAVE        SEND
       highlighted.




34                  Magellan GSC 100 Global Satellite Communicator
 Auto Message Check
  This feature allows you to set your GSC 100 to automatically
  check for GlobalGrams at specified intervals. You can access the
  AUTO MSG CHEK screen and choose from a menu of interval
  times to have the unit automatically check for received messages.
     From the MAIN MENU, press the               OR
                                                      B            10:41A

     softkey corresponding to SETUP.         ORBCOMM SETUP
                                              GCC ID
     Use the UP/DOWN ARROWs to                DEFAULT CHAR
     highlight ORBCOMM SETUP and              FONT SIZE
     press ENTER. This brings you to          DISPLAY CHARS
                                              AUTO MSG CHEK
     the ORBCOMM SETUP MENU
     where you will highlight AUTO
     MSG CHEK and press ENTER.
     You will now be at the AUTO MSG             OR
                                                      B            10:42A
     CHEK screen where you will have          A U T O MS G C H E K
     the following message checking           OFF
     interval options: OFF, 1 HOUR, 2         1 HOUR
                                              2 HOURS
     HOURS, 4 HOURS, 8 HOURS and              4 HOURS
     24 HOURS. Using the UP/DOWN              8 HOURS
     ARROWs, highlight the interval of        24 HOURS
     your choice and press ENTER.
     The unit will automatically check
     for messages during the
     ORBCOMM satellite pass closest
     to the frequency specified,
     regardless of the operation you are
     performing at that time, as long as
     you are in AUTO or ORBCOMM
     Mode.


       The GSC 100 must have a clear view of the sky in order to
       transmit/receive globalgrams from an ORBCOMM satellite.




Magellan GSC 100 Global Satellite Communicator                        35
Address Book
     The address book, accessed from the MESSAGE LIST, allows you
     to store frequently used addresses as well as speed dial addresses.
     It saves you time when creating a GlobalGram by allowing you to
     choose an address from a preset list that you have already created.
     You are able to save up to one-hundred and fifty (150) addresses
     in the unit and eight speed dial addresses at the GCC (during
     activation). You are able to view, edit, create and delete addresses
     while working in the address book. Addresses that are preceded
     by a number alert you that they are speed dial addresses stored at
     the Gateway Control Center and cannot be edited from your unit.
     To access the ADDRESS BOOK you will press the MSGS softkey
     from the MAIN MENU. You will then press the ADBK softkey.
     Addresses are listed alphabetically by the nickname you have
     given them. You will be able to locate a nickname very quickly
     by pressing the alphanumeric key of the first letter of
     the nickname desired. In the event that there are no nicknames
     associated with the letter chosen, the nickname beginning with
     the next alphabetic character will be displayed.
       The UP/DOWN ARROWs allow                     OR
                                                         B
                                                                     C
                                                                     A
                                                                     P      12:21P

       you to move through the list one             Don Smith
       address at a time while the LEFT/        1   SPEED DIAL              1
                                                2   SPEED DIAL              2
       RIGHT ARROWs allow you to
                                                3   SPEED DIAL              3
       page through the list until the final
                                                4   SPEED DIAL              4
       address is highlighted. Pressing the     5   SPEED DIAL              5
       ESC key from the address list will       SELCT        DESEL   SAVE

       return you to the MESSAGE LIST.
Viewing an Address
     This allows you to view the address and name associated with the
     nickname listed in the address book.




36                  Magellan GSC 100 Global Satellite Communicator
     To view an address, proceed from the MESSAGE LIST to the
     ADDRESS BOOK , by pressing the ADBK softkey. Use the
     UP/DOWN ARROWs to highlight the address to view and
     press ENTER. This will bring up a screen showing all the
     information associated with that particular address. If the
     address is too long for the screen, use the UP/DOWN
     ARROWs to scroll down and view the whole address.
     You will have the softkey options            OR
                                                       B
                                                                C
                                                                A
                                                                P10:55A

     of NEW, EDIT or DEL. Press the
                                               NAME: 
     softkey corresponding to the option       DonSmith 
     you wish to choose. If you want to        
     exit without using these options,         ADDRESS:  
                                               dsmith@aol.com 
     press the ESC key and you will be
     returned to the address book with          NEW EDIT  DEL

     the address you just viewed
     highlighted.
 Creating a New Address
  This function allows you to input a new address into your address
  book, using a nickname as the identifier.
     Access the ADDRESS BOOK, by                       OR
                                                            B
                                                                    C
                                                                    A
                                                                    P   11:10A

     pressing the ADBK softkey from           NAME:
     the MESSAGE LIST, and press the          DON
     NEW softkey. You will be
     prompted for a nickname for the
     address you are about to enter.
     This nickname can be a maximum            ADRS             SAVE

     of twenty (20) characters in length
     although only fourteen (14)                   OR               C
                                                           B
                                                                    A
                                                                    P   11:12A
     characters will be visible in the        ADDRESS:
     ADDRESS LIST. Use the                    donsmith@aol
     ALPHANUMERIC KEYS to
     enter the nickname and then press
     the ADRS softkey to enter the
     address for this nickname, using the      NAME             SAVE
     ALPHANUMERIC KEYS.

Magellan GSC 100 Global Satellite Communicator                             37
       Once the address has been entered press the SAVE softkey.
       This will save that address under the nickname you specified.
       You are then brought back to the ADDRESS BOOK with the
       address you just entered highlighted.
     When a GlobalGram is created using an address from the
     ADDRESS BOOK, the nickname is displayed, not the actual
     address. However, when transmitted to the satellite, the message
     is sent to the nickname's actual e-mail address. The nickname is
     provided to help you quickly recognize addresses that you use
     more frequently than others.
Editing an Address
     This allows you to edit an existing address you have stored in the
     unit.
       To EDIT an existing address,                 OR
                                                         B
                                                                         C
                                                                         A
                                                                         P        11:13A

       access the ADDRESS BOOK, by                  DON
                                                1   SPEED               DIAL      1
       pressing the ADBK softkey from
                                                2   SPEED               DIAL      2
       the MESSAGE LIST. Use the UP/            3   SPEED               DIAL      3
       DOWN ARROWs to highlight the             4   SPEED               DIAL      4
       address to edit and press the EDIT       5   SPEED               DIAL      5
       softkey. Use the                          NEW             EDIT   MSGS      DEL

       ALPHANUMERIC KEYS to
                                                     OR
                                                                                  12:02P
       change the address. If you begin to                   B


                                                    ATTENTION!
       edit an address but need to exit         ADDRESS NOT SAVED
       during the operation, press the ESC
       key. Selecting YES will save the
       new address changes. Selecting
       NO will undo the changes and                  SAVE ADDRESS?
                                                                 YES         NO
       retain the original address.
Deleting an Address
     This function allows you to delete an existing address from the
     ADDRESS BOOK. You cannot delete a speed dial address
     because it is stored at the GCC.



38                 Magellan GSC 100 Global Satellite Communicator
     From the ADDRESS BOOK , use              OR
                                                   B                     12:07P

     the UP/DOWN ARROWs to                    ATTENTION!
                                            DELETE ADDRESS?
     highlight the address you wish to            DON
     delete. Press the DEL softkey, at
     which time you will be prompted to
     confirm your wish to delete this
     address.                                              YES    NO



     If you press the YES softkey, the address will be deleted and
     you will be brought back to the ADDRESS BOOK with the
     next address in the list highlighted. Pressing the NO softkey
     returns you to the ADDRESS BOOK with the address you were
     going to delete, highlighted.
 Capturing an Address
  The CAPAD feature allows you to retain addresses, from received
  GlobalGrams, for storage in your ADDRESS BOOK. It is
  available as a softkey option when you are reading incoming
  GlobalGrams. When you select this function the receiver will
  compare the addresses contained in the received message to those
  contained in the ADDRESS BOOK. If there are no matches, then
  the receiver will list those addresses as new to your ADDRESS
  BOOK. You then have the option to save them to your ADDRESS
  BOOK.
     When reading an incoming e-mail           OR
                                                       B
                                                                  C
                                                                  A
                                                                  P      12:53P

     address, press the CAPAD softkey.       CAPTURE ADRS
                                           jsmith@aol.com
     This brings up the CAPTURE
     ADRS screen, showing the address,
     or addresses, to be captured. You
     will have the softkey option to
     SELCT the address.                                          SELCT




Magellan GSC 100 Global Satellite Communicator                              39
                                                          OR           C

       When you press the SELCT                                B  12:51P
                                                                       A
                                                                       P




       softkey, you are brought to the         NAME:
       NAME screen, where you will enter
       the nickname for this new address.
       You will have the softkey options
       of ADRS and SAVE, allowing you
       to see the address again or save the     ADRS        SAVE

       nickname. If there is more than
       one address contained in an incoming e-mail, carbon copy as
       well as sender, you will be brought back to CAPTURE ADRS
       screen to view the additional address. If you do not wish to
       save the additional address, press the ESC key, which will
       bring you back to the message.

GCC Addresses (Speed Dial)
     Addresses that are used most                    OR
                                                          B
                                                                   C
                                                                   A
                                                                   P 10:45A

     frequently, can be stored at the                Don Smith
                                                   1 SPEED DIAL 1
     Gateway Control Center. They are
                                                   2 SPEED DIAL 2
     listed in your unit as Speed Dial
                                                   3 SPEED DIAL 3
     addresses and identified by nicknames         4 SPEED DIAL 4
     that you give them. During the                5 SPEED DIAL 5
     activaton process, you can assign a list       NEW   EDIT MSGS  DEL

     of addresses to be store at the GCC for
     use in STORE & FWD GlobalGrams. You can only send a
     STORE & FWD GlobalGram to a speed dial address.
     Sending to a speed dial address saves you on the number of
     characters transmitted with the message. Since the speed dial
     address is only one character, you will only be charged for that
     one character instead of the whole address. When you send the
     list to your GCC, you must remember that the order in which they
     are listed is important. If your wife is listed at the GCC as being
     the #1 speed dial address, then your unit should reflect your
     wife's name, or nickname, in the #1 speed dial position The
     reason for this is that when you choose a speed dial address as the
     recipient, only the number is sent to the GCC. When the GCC
     receives the GlobalGram, they route it to the address associated
     with the speed dial number you used.

40                  Magellan GSC 100 Global Satellite Communicator
 Messages

  This section outlines the various functions associated with
  sending and receiving GlobalGrams with your GSC 100.

 Requesting Message Check
  Since your incoming GlobalGrams are stored at ORBCOMM
  until you request them, you must first request your unit to
  CHECK MESSAGES. Your GSC 100 will send all queued
  messages prior to checking for any incoming messages. You
  must have a clear view of the sky, with the unit held away from
  your body and the ORBCOMM antenna fully extended. Your
  unit must be in either AUTO or ORBCOMM mode to transmit
  GlobalGrams.
     From the MAIN MENU, press the                    OR
                                                           B         12:50P

     MSGS softkey. This brings you to           Flight Informa
                                               C
                                               MH eeEtCinKg Mch SaG nS ge
     the MESSAGE LIST where you will           M  A I L B O  X      n

     press the MNU key. A pop-up               B0o0at0  K0e y0s 0M
                                               C
                                               LaOt N
                                                    eT  AR A
                                                          rr  Sa
                                                             iv  Tl
     menu appears with the options of          S Y S    M O  D  E
                                               Rental Car
     CHECK MSGS, MAILBOX,                      Party Arrangem
     CONTRAST and SYS MODE.                   NEW   MSTAT   ADBK     DEL

     Use the UP/DOWN ARROWs to                        OR
                                                           B         12:50P
     highlight CHECK MSGS and press             Flight Informa
     ENTER. A check icon is now                Meeting change
     present at the top left corner of the     Boat Keys
     screen, alerting you that a request       Late Arrival
     to CHECK MSGS was sent. That              Rental Car
     check icon remains present until          Party Arrangem
                                              NEW   MSTAT   ADBK     DEL
     the satellite sends a message to
     your unit either confirming, by sending the messages, or
     denying, by sending a "NO MESSAGES" message, the
     presence of messages. When an ORBCOMM satellite comes
     into view, your GSC 100 sends a request to the satellite for any
     messages that are waiting for you.



Magellan GSC 100 Global Satellite Communicator                          41
         When you are receiving a GlobalGram from a satellite, a
         double arrow icon will be displayed at the top of your screen.
         This alerts you that your GSC 100 is communicating with a
         satellite.

Messaging Icons
     While sending and receiving GlobalGrams there are icons that
     will be displayed in the status bar at the top of your GSC 100's
     screen. For a complete description of all icons that are available
     refer to the ICONS appendix located at the back of this manual.
     C
     A
     P     CAPS. Appears when the keypad is active and capital
           letters are being used.
     A
     L
     T
           ALT. The keypad is active and the ALT function is engaged.
           This signifies that the alternate (secondary) character mode
           is active and the characters listed in the upper right corner of
           the alphanumeric keys are now active.
           Page. Appears next to messages that have been saved but
           not sent.
           Envelope. Appears when you have an unread GlobalGram
           in the MESSAGE LIST. This icon is also shown next to the
           actual GlobalGram in the MESSAGE LIST alerting you that
           this message is unread.
           Open Envelope. Appears next to GlobalGrams that you
           have already opened and read.
           Envelope and Check. Appears after you execute the check
           message function and there are unread GlobalGrams in the
           unit.
           Check. Appears after you have executed the check
           messages function. It disappears after the unit has checked
           for messages.
           Mailbox with Flag Up. Appears when there are
           GlobalGrams present in the mailbox to be sent at the next
           satellite pass. The flag on the side of the mailbox is in the
           UP position alerting you that mail is present.

42                   Magellan GSC 100 Global Satellite Communicator
           Mailbox with Flag Down. Appears next to GlobalGrams
           that have been sent.
  OR       ORBCOMM Mode. Displayed when the unit is operating
       B
           in the ORBCOMM mode.
  GP
    S      GPS Mode. Appears when the unit is operating in the GPS
           mode.
           Satellite. Appears in the status bar when ORBCOMM
           satellites are in view. It appears during the times listed on
           the ORBCOMM satellite schedule.
           Double Arrow. When you are outdoors transmitting to an
           ORBCOMM satellite, you will see this icon appear in the
           status bar. It alerts you that the unit is in communication
           with a satellite and your available message option is
           STANDARD.
           Broken Double Arrow. This icon appears in the status bar
           when your unit is transmitting to an ORBCOMM satellite
           but that satellite is not transmitting to a Ground Earth
           Station. It alerts you that your only available message
           option is STORE & FWD.
           Down Arrow. Displayed while the unit is "listening" to an
           ORBCOMM satellite but not yet transmitting.
           Broken Down Arrow. Displayed while the unit is
           "listening" to an ORBCOMM satellite, but not transmitting,
           and the only available GlobalGram type is STORE & FWD.

 Viewing Received GlobalGrams
  When GlobalGrams are received you will have the ability to view
  them from the MESSAGE LIST . GlobalGrams appear in the
  order in which they were received with newer messages
  appearing at the top of the list. After the icon for the message, the
  first fourteen (14) characters of the subject will be listed. When
  there is a received message, that hasn't been read, an envelope
  will appear in the icon bar at the top of the screen. This alerts you
  that there is an unread message in the MESSAGE LIST.

Magellan GSC 100 Global Satellite Communicator                             43
     Any attachments to incoming GlobalGrams will be stripped out
     prior to receipt.
     On the MESSAGE LIST, unread messages will be designated by a
     closed envelope icon. GlobalGrams that have already been read,
     but not deleted, will be designated by an open envelope icon.
     Received GlobalGrams will display the sender, carbon copy (cc)
     recipients, subject and text.
       To view a GlobalGram, access the              OR
                                                             B     12:45P

       MESSAGE LIST from the MAIN                   Flight Informa
       MENU, by pressing the MSGS                  Meeting change
                                                   Boat Keys
       softkey. Use the UP/DOWN
                                                   Late Arrival
       ARROWs to highlight the message
                                                   Rental Car
       to be viewed and press ENTER.               Party Arrangem
       When the message appears on the            NEW  MSTAT  ADBK DEL

       screen, the subject and text fields
       are shown with the arrow keypad              OR
                                                         B          1:52P
       icon in the icon bar. This alerts you
       that you can use the keypad to            SUBJECT: FLIGHT
                                                 INFORMATION
       scroll through the message to see
       the sender, the cc recipients and         TEXT: MY FLIGHT
       any portion of the message that           HAS CHANGED
                                                 AGAIN. I ARRIVE AT
       isn't visible. Within the message,       REPLY   FWD  CAPAD DEL

       you will have the softkey options
       for the following functions: REPLY, to reply to this
       GlobalGram, FWD, to forward the GlobalGram, CAPAD, to
       capture the address of the sender, and DEL, to delete the
       GlobalGram. If you press the ESC key from this screen you
       will be returned to the MESSAGE LIST with the message
       highlighted and an open envelope icon next to it. Also, the
       envelope icon, at the top of the screen, has now disappeared
       reflecting that there are no unread GlobalGrams. When there
       are no GlobalGrams in the MESSAGE LIST the unit will read,
       "NO MESSAGES PRESS NEW TO CREATE A MESSAGE."




44                 Magellan GSC 100 Global Satellite Communicator
 Creating a GlobalGram
  There are several instances when a GlobalGram will be created,
  such as when the NEW softkey is pressed from the MESSAGE
  LIST, when you forward a GlobalGram or when you reply to a
  received GlobalGram. GlobalGrams are divided into two types:
  STANDARD and STORE & FWD.

     Message Type       No. of Recipients          Subject Field         Text Field       Icon Displayed
                                1                       None                 229
    STORE & FWD
                    (Speed Dial Address Only)     (SF: Timestamp)    Characters Maximum
                                7                        79                  2000
     STANDARD
                    (Primary & CC Combined)     Characters Maximum   Characters Maximum

  STANDARD GlobalGrams will consist of recipients, a subject
  and text. The recipients will be divided into primary and carbon
  copy recipients with a total number of seven recipients allowed,
  primary and carbon copy combined. Each message must have at
  least one primary recipient. The subject of the message will have
  a maximum length of 79 characters and the text message will
  have a maximum length of 2000 characters. A STANDARD
  GlobalGram can only be transmitted when you are in
  communication with an ORBCOMM satellite and that satellite is
  in communication with an ORBCOMM Ground Earth Station
  (GES). When the double arrow icon is present in the status bar,
  on the top of the screen, it alerts you that you are in
  communication with both an ORBCOMM satellite and a GES,
  making it possible to transmit a STANDARD GlobalGram.
  STORE & FWD GlobalGrams consist of only one recipient and
  text, where the recipient must be one of the speed dial addresses
  pre-registered at the GCC. The STORE & FWD text is restricted
  to 229 characters. If you create a STORE & FWD, but don't have
  any addresses stored at the GCC, the message will not be
  delivered. Conversely, when the broken double arrow icon is
  displayed, it alerts you that you are in communication with an
  ORBCOMM satellite but the satellite is not in contact with a GES
  and your message option is STORE & FWD only.

Magellan GSC 100 Global Satellite Communicator                                                       45
     Any time a GlobalGram is created, the unit will prompt you for
     the type of GlobalGram to create. The picture below depicts the
     transmission states associated with each type of globalgram. The
     procedures for creating GlobalGrams are contained in the next
     two sections.
                 ORBCOMM satellite in contact with a GES




                     STANDARD GlobalGram


      ORBCOMM satellite stores GlobalGram until it is in contact with a GES




                   STORE & FWD GlobalGram

46                   Magellan GSC 100 Global Satellite Communicator
 Sending Standard GlobalGrams
  STANDARD GlobalGrams are the most commonly used
  GlobalGrams. These are sent when the ORBCOMM satellite you
  are currently in communication with is also in contact with an
  ORBCOMM Ground Earth Station. If this condition is not true,
  indicated by the broken double arrow icon, then you need to send
  a STORE & FWD GlobalGram. If you know that you will not be
  in conact with a GES, then send a STORE & FWD. Refer to
  www.orbcomm.com for an updated list of coverage areas.
     To send a STANDARD                            OR
                                                        B          1:07P

     GlobalGram, press the MSGS               M  E  S S A G E  T Y P  E
     softkey from the MAIN MENU.
                                                   STORE & FWD
     This brings up the MESSAGE LIST
                                                   STANDARD
     where you press the NEW softkey.
     At this point you will be prompted
     to select the type of GlobalGram to
     send. Use the UP/DOWN
     ARROWs to highlight                           OR
                                                        B
                                                              C
                                                              A
                                                              P    1:09P

     STANDARD and press ENTER.              TO:
     You are now at the TO screen           DONSMITH@AOL.CO
                                            M
     where you will enter the primary
     recipients of this message. As was
     stated earlier, you may only have a
     total of seven recipients for any         CC    ADBK  SAVE   SEND

     message, primary and carbon copy
     recipients combined. Use the                  OR
                                                        B
                                                              C
                                                              A
                                                              P    1:11P
     ADDRESS BOOK, for stored               CC TO:
     addresses or speed dial addresses,
     or manually enter the address of the
     recipients of this message, using
     the ALPHANUMERIC KEYS,
     and press the SAVE softkey. When         SUBJ   ADBK   SAVE  SEND
     you have completed this, press the
     CC softkey and enter the carbon copy recipients the same way
     as was done with the primary recipients.

Magellan GSC 100 Global Satellite Communicator                       47
     When you are done entering the CC             OR
                                                        B
                                                             C
                                                             A
                                                             P     1:13P

     address, press the SUBJ softkey        SUBJECT:
     which will bring you to the
     SUBJECT screen, where you will
     enter the subject of the message.
     Use the ALPHANUMERIC
     KEYS to enter the subject. You         TEXT            SAVE   SEND

     will have the ability to enter up to
     seventy-nine (79) characters in the
     SUBJECT field. You can use this as
     the text field if your message is
     within the limit. You will have the
     softkey options to SAVE, SEND or
     TEXT to continue to the text
     portion of the message. Pressing
     the SEND softkey will accept the
     current entries and send the
     message to the MESSAGE LIST,
     with the mailbox icon next to it.
     The message is also sent to the
     MAILBOX for delivery. Pressing                          C
                                                  OR         A
                                                                   1:15P
     the TEXT softkey, brings you to                   B     P



                                            TEXT:
     the TEXT screen where you will
     use the ALPHANUMERIC KEYS
     to enter the text, or body, of the
     message. You will have the ability
     to enter up to two-thousand (2000)
                                             TO             SAVE   SEND
     characters in the text field.
     The softkey options available are TO, SAVE and SEND.
     Pressing the softkey corresponding to TO will bring you back
     to the TO screen allowing you to amend the primary recipients
     of the message. When you press the SAVE softkey, the
     message will be saved and you will be brought to the
     MESSAGE LIST with that message highlighted and the page
     icon next to it.


48              Magellan GSC 100 Global Satellite Communicator
     When you press the SEND softkey you will be brought to the
     MESSAGE LIST with this message highlighted and a mailbox
     icon next to it. This signifies that the message has been saved
     and sent to the MAILBOX where, at the next transmission, will
     be sent to the GES and then on to the addresses listed.
 Sending STORE & FWD Globalgrams
  STORE & FWD GlobalGrams are used when you are in
  communication with a satellite but that satellite is not in contact
  with the GES. When a STORE & FWD GlobalGram is sent, it is
  stored in that satellites memory until it is again in contact with a
  GES. To alert you that the satellite is not in contact with a GES, a
  broken double arrow icon is displayed in the status bar. When
  this is present, the only available GlobalGram type will be a
  STORE & FWD. STORE & FWD GlobalGrams can only be
  sent to recipients who you registered, during activation, as
  speed dial addresses at your preferred GCC. If you send a
  STORE & FWD to a speed dial address that you have not
  registered, the GlobalGram will be sent but will never be
  delivered since there is no associated address on file at the
  GCC. You will not be able to enter a STORE & FWD recipient
  by way of the alphanumeric keys.
                                                 OR
                                                      B          1:30P
     From the MAIN MENU, press the            MESSAGE TYPE
     MSGS softkey. This brings up the
     MESSAGE LIST where you press                 STORE & FWD
     the NEW softkey. You will be                 STANDARD
     prompted to select the type of
     GlobalGram to send. If your GSC
     100 is in communication with an
     ORBCOMM satellite, but not in communication with your a
     GES, the broken double arrow icon will be displayed, alerting
     you that you will only be able to transmit a STORE & FWD
     GlobalGram. Highlight STORE & FWD and press ENTER.




Magellan GSC 100 Global Satellite Communicator                     49
     At this point you will be prompted,           OR
                                                        B
                                                                     C
                                                                     A
                                                                     P     1:32P

     in the TO screen, to PRESS ADBK        TO:
     TO SELECT RECIPIENT. After                         PRESS ADBK
                                                         TO SELECT
     pressing the ADBK softkey, use the                  RECIPIENT
     UP/DOWN ARROWs to highlight
     the speed dial address desired and
     press the DONE softkey. This            TEXT            ADBK   SAVE   SEND

     returns you to the TO screen. Since
     you can only have one recipient
     and text in a STORE & FWD
     GlobalGram, press the TEXT
     softkey.
     You will now be at the TEXT
                                                                     C
                                                    OR
                                                         B
                                                                     A
                                                                     P     1:35P

     screen, where you will use the         TEXT:
     ALPHANUMERIC KEYS to
     enter your message. The unit will
     not allow you to enter more than
     the available limit of 229. The
     softkey options of TO, SAVE or           TO                    SAVE   SEND

     SEND are now available.
     When you press the TO softkey, you are brought back to the
     TO screen where you will be able to change the primary
     recipient of this message. If you wish to change the recipient,
     press the ADBK softkey. You are brought back to the
     ADDRESS BOOK , where you will be able to choose a new
     recipient. Press the SAVE softkey to be returned to the TO
     screen with the new recipient listed. If you need to edit the
     message, press the TEXT softkey. If everything is correct and
     you are ready to send the message, press the SEND softkey. If
     you are done with the message but do not wish to send it yet,
     you can press the SAVE softkey to save it to the MESSAGE
     LIST to send at a later time. You will be brought back to the
     MESSAGE LIST with the message highlighted and a page icon
     to the left. The subject of the message, shown on the
     MESSAGE LIST, will have the subject being SF, for STORE &

50              Magellan GSC 100 Global Satellite Communicator
     FWD, plus the time the message was created. When you are
     ready to send, access the MESSAGE LIST , highlight the
     STORE & FWD GlobalGram and press ENTER. This opens
     up the message and gives you the softkey options of EDIT,
     COPY, SEND and DEL. Press the SEND softkey. You will
     be brought back to the MESSAGE LIST with the STORE &
     FWD GlobalGram highlighted and a mailbox icon, with the
     flag in the up position, to the left of the message. This icon
     alerts you that the message has been sent to the message queue,
     or MAILBOX, and will be sent during the next satellite pass
     while you are transmitting. The maximum number of STORE
     & FWD GlobalGrams that can be transmitted during one
     satellite pass is sixteen (16).

 Sending a GlobalGram to a GSC 100
  When sending a message to a GSC 100, the sender will have to
  adhere to the character limits specified for sending either a
  STANDARD or STORE & FWD GlobalGram. For a
  STANDARD GlobalGram the subject will have a maximum
  length of 79 characters and the text message will have a
  maximum length of 2000 characters. All other entries will be the
  same as if you were sending to any other internet address. Your
  message will be transmitted to the GSC 100 when it is next in
  communication with an ORBCOMM satellite.

       For additional assistance on sending STORE & FWD
       GlobalGrams see the following website: www.orbcomm.com/
       globalgram.


  When the pc-user knows that the GSC 100 user will not be in
  communication with a Ground Earth Station then they will send a
  STORE & FWD GlobalGram. When sending a STORE & FWD
  from a pc, the subject field must contain the following phrase:
  (GlobalGram: SAT=XX). The "XX" represents the satellite
  identification number that the pc-user will send this STORE &
  FWD to for transmission. As more satellites become available,

Magellan GSC 100 Global Satellite Communicator                   51
     there will be more id's to choose from. For the satellite id, the
     user will insert a number from 1 to 12 in place of the "XX." The
     character limits for the text of the message will be 182.

Selecting Recipients from the Address Book
     This allows you to choose an address, stored or speed dial, from
     the list in the ADDRESS BOOK, which saves you time when
     composing a GlobalGram.
       When composing a GlobalGram, in             OR
                                                        B
                                                                        C
                                                                   12:21P
                                                                        A
                                                                        P




       the TO screen, press the ADBK              Don Smith
       softkey. This will bring up the         1 SPEED DIAL 1
                                               2 SPEED DIAL 2
       ADDRESS BOOK, listing all of the
                                               3 SPEED DIAL 3
       addresses that you have saved in
                                               4 SPEED DIAL 4
       the unit. Either enter the first letter 5 SPEED DIAL 5
       of the nickname or use the UP/          SELCT DESEL DONE

       DOWN ARROWs to scroll or
       page down to the address you wish to use. You may also send
       to a speed dial address to save time and character spaces.
       When you have highlighted the address to be inserted into the
       GlobalGram, either press ENTER or the SELCT softkey.
       This will put a check mark next to that address letting you
       know that it has been selected.

       To return to the message while                   OR
                                                             B
                                                                            C
                                                                            A
                                                                            P   12:19P

       keeping the address you have             TO:
       selected, press the DONE softkey,        Don Smith,
       returning you to the TO screen. If
       you have made an error and need to
       deselect the address, you can either
       press the ENTER key again or               CC             ADBK   SAVE    SEND

       press the DESEL softkey. Pressing
       ESCAPE brings you out of the
       ADDRESS BOOK screen and back
       to the message without saving the
       address to the message.


52                 Magellan GSC 100 Global Satellite Communicator
 Inserting Symbols & Characters into GlobalGrams
  When creating a GlobalGram it is sometimes necessary to include
  symbols. Many symbols can be accessed through the
  ALPHANUMERIC KEYS, using the ALT mode and pressing
  the desired key, while an extended list can be found in the
  SYMBOLS MENU. There are two ways to insert a symbol:
                                                               A
                                                     OR
     While in the message, press the                      B
                                                               L
                                                               T     1:45P
                                              TEXT:
     ALT key and then press the
                                              The meeting is now
     ALPHANUMERIC KEY that has                 @
     the symbol you need ENTER.
     This will insert the symbol at the
     cursor point.
                                                TO            SAVE   SEND



                                                               C
                                                     OR        A
                                                                  1:47P
     If the symbol you need is not                        B    P



                                           TEXT:
     located on the alphanumeric keys,         CHECK MSGS
                                           The   meeting is now
     you may access an extended list of    @ MAILBOX
                                               CONTRAST
     symbols in the SYMBOLS MENU.              SYS MODE
     While in the message, press the           INSERT SYM
     MNU key to bring up a pop-up
                                             TO          SAVE    SEND
     menu listing additional options.                          C
                                                     OR
                                                                  1:48P
     Use the UP/DOWN ARROWs to
                                                               A
                                                          B    P



                                           TEXT:
     highlight INSERT SYM and press           CHEC K MSGS
                                           The   meeting
                                                PO  S TIMEis now
                                                              DATE
     ENTER. This brings you to the         @ M AILB OX ;
                                              CON , TR A ST #  ^
     SYMBOLS MENU where you will                       "
                                              SYS _  MOD   E
     use the UP/DOWN ARROWs to                I NSER T [ SYM   ]
                                                  ~    <       >
     highlight the symbol needed and
                                             TO          SAVE    SEND
     then press ENTER. This inserts
     the symbol at the cursor point. You may also access the
     SYMBOLS MENU by pressing the ALT key and then the SYM
     key which will bring up the pop-up SYMBOLS MENU, where
     you will use the same keystrokes as were just discussed.
     Within the SYMBOLS MENU there is also an option to include
     the TIME, DATE or POS into your GlobalGram. The POS
     information is your GPS calculated coordinates.

Magellan GSC 100 Global Satellite Communicator                         53
Viewing Created GlobalGrams
     You have the ability to view GlobalGrams that you have created
     and sent from your GSC 100. When you create a GlobalGram
     and save it without sending, the message is stored in the
     MESSAGE LIST with the page icon next to it. When you send the
     message, the icon changes to the mailbox icon with the flag in the
     up position. After the message is sent, it appears in the
     MESSAGE LIST with the mailbox icon with the flag in the down
     position. The message is also sent to the MAILBOX, where it is
     listed, by subject, without any icons next to it.
       To view any of the above created                OR
                                                            B                 12:50P

       messages, access the MESSAGE              Flight Informa
       LIST, by pressing the MSGS                Meeting change
                                                 Boat Keys
       softkey from the MAIN MENU.
                                                 Late Arrival
       Use the UP/DOWN ARROWs to
                                                 Rental Car
       highlight the message you wish to         Party Arrangem
       view and press ENTER. You are            NEW         MSTAT      ADBK   DEL

       brought to the MESSAGE VIEW
       screen where you can use the UP/
       DOWN ARROWs to scroll
       through the message, seeing all of
       the information it contains. You            OR
                                                        B                     12:52P
       will also have the softkey options
       of EDIT, COPY, SEND and DEL.             SUBJECT: Meeting
       To escape and return to the              Change
       MESSAGE LIST, press the                  TEXT: The meeting
       ESCAPE key. You will be                  has changed. It
       returned to the MESSAGE LIST             will be moved to
                                                EDIT            COPY   SEND   DEL
       with the message highlighted.




54                 Magellan GSC 100 Global Satellite Communicator
 Accessing the Mailbox
  When a GlobalGram is sent, it not only is listed on the MESSAGE
  LIST, but is sent to the MAILBOX to be transmitted at the next
  available ORBCOMM satellite pass. This screen allows you to
  view the messages that have been sent to the MAILBOX.
     From the MAIN MENU, press the                  OR
                                                         B              12:50P

     MNU key. A pop-up menu appears           Flight Informa
                                             C
                                             MHeeEtC inKg Mch SaG nSge
     with the options of CHECK MSGS,         M A  I L B O  X      n

     MAILBOX, CONTRAST and SYS               B0o 0
                                                 at0  K0e y0s 0M
                                             C
                                             LaOt N
                                                  eT  AR A
                                                        rr  Sa
                                                           iv  Tl
     MODE. Use the UP/DOWN                   S Y S    M O  D  E
                                             Rental Car
     ARROWs to highlight MAILBOX             Party Arrangem
     and press ENTER.                        NEW         MSTAT   ADBK   DEL




                                               OR
     You are now at the MAILBOX,                    B                   11:36A
                                                        MAILBOX
     where you can view the messages
                                             Meeting change
     that are ready to be sent. There are    Late Arrival
     no icons listed next to the messages    ST: 10:52:43A
     in this screen since they are all       SF: 11:22:55A
     awaiting transmission. Within the
     MAILBOX you have the softkey                                DEL

     option to DEL the highlighted
     message. If you choose to delete
     the message, it isn't deleted from
     the unit, it is just removed from the
     MAILBOX. The message will still
     be listed on the MESSAGE LIST,
     but it will now have the page icon
     next to it instead of the mailbox
     with the flag in the up position
     icon. To exit out of the MAILBOX,
     without deleting, press the ESC
     key, to back out one level at a time,
     or the HOME key to return to the
     MAIN MENU.

Magellan GSC 100 Global Satellite Communicator                             55
Editing a GlobalGram
     This feature enables you to edit a GlobalGram, you created, prior
     to sending it to the specified recipients. Since GlobalGrams may
     be stored in the MAILBOX until the next ORBCOMM satellite
     transmission, they may change or need to be edited. A
     GlobalGram can only be edited when it is taken out of the
     MAILBOX first. If you try to edit the message while it is in the
     mailbox you will be prompted to take it out of the MAILBOX
     first. Your response should be YES.
       Access the MESSAGE LIST, use the               OR
                                                           B                     1:52P

       UP/DOWN ARROWs to highlight
                                               SUBJECT: FLIGHT
       the message to be edited and press      INFORMATION
       ENTER. This brings up all the
       information relating to that            TEXT: MY FLIGHT
                                               HAS CHANGED
       message; CC, TO, SUBJ and               AGAIN. I ARRIVE AT
       TEXT. You have four softkey             EDIT                COPY   SEND   DEL

       options while in this screen; EDIT,
       COPY, SEND and DEL. Press the
                                                      OR
       softkey corresponding to EDIT.                      B                     1:53P
                                                  ATTENTION!
       If you have not removed the                 UNABLE TO EDIT
       GlobalGram from the MAILBOX                MESSAGES IN THE
                                                      MAILBOX
       then you will be prompted to
       remove the message before editing.                REMOVE
       Pressing the YES softkey brings                BEFORE EDITING?
       you to the TEXT SCREEN with the                              YES    NO


       first character of the message
       highlighted. At this point, the                 OR                  C
                                                               B           A
                                                                                 1:54P
       procedures to edit are the same as      TEXT:
                                                                           P




       creating a GlobalGram. When             MY FLIGHT HAS
       finished editing press the SEND         CHANGED AGAIN.
                                               I ARRIVE AT 8PM
       softkey. You will be brought back       NOW. MEET ME AT
       to the MESSAGE LIST with the            THE AIRPORT.
       message highlighted and the             THANKS.
                                                TO                        SAVE   SEND
       mailbox icon next to it.



56                 Magellan GSC 100 Global Satellite Communicator
     To remove the message from the                  OR
                                                          B              1:55P

     MESSAGE LIST, prior to editing,            Flight Informa
                                                 CHECK MSGS
     highlight the message and press the        M eeting change
                                                 MAILBOX
                                                B oat Keys
                                                 CONTRAST
     MNU key, which will bring up a
                                                LSYS  MODE
                                                  ate A rrival
     pop-up menu. Use the UP/DOWN
                                                Rental Car
     ARROWs to highlight MAILBOX                Party Arrangem
     and press ENTER.                          NEW        MSTAT   ADBK   DEL


                                                     OR
     You are now at the MAILBOX                           B              1:57P

     screen where you will be able to                MAILBOX
                                                Meeting Change
     DELETE the message from the
     mailbox. Press the softkey
     corresponding to DEL.

                                                                  DEL




     Pressing the DEL key, from the                  OR
                                                          B              1:58P

     MAILBOX screen, will not delete            Flight Informa
                                                Meeting change
     the GlobalGram from the unit, it
                                                Boat Keys
     will remove it from the mailbox            Late Arrival
     and change the icon from a mailbox         Rental Car
     icon to a page icon. Your message          Party Arrangem
     is now ready for editing.                 NEW        MSTAT   ADBK   DEL



 Copying a GlobalGram
  Since there is a limit of seven (7) recipients for any STANDARD
  GlobalGram, primary and carbon-copy combined, this feature
  allows you to COPY GlobalGrams you have created, omitting the
  recipients, to additional groups of recipients without having to re-
  enter the message. This function will be the same as creating a
  GlobalGram, although the subject and text fields will contain the
  information you had copied from the previous message.
  STANDARD GlobalGrams will be copied to STANDARD
  GlobalGrams while STORE & FWD's will be copied to STORE
  & FWD's.


Magellan GSC 100 Global Satellite Communicator                             57
        To COPY a GlobalGram, access the MESSAGE LIST, by
        pressing the MSGS softkey from the MAIN MENU. Use the
        UP/DOWN ARROWs to highlight the message to be copied
        and press ENTER. This allows you to view the message, with
        the a softkey option to COPY. Press the COPY softkey. You
        are immediately brought to the TO screen where you will be
        able to enter the additional recipients, using the
        ALPHANUMERIC KEYS or by pressing the ADBK softkey.
        At this point you will use the same procedures as were used
        when "CREATING A GLOBALGRAM."

Replying to a GlobalGram
     The REPLY feature allows you to respond to a received
     GlobalGram without having to enter either the TO or the SUBJ
     field. You still have the ability to edit these fields as well as input
     carbon copy recipients. When replying to a GlobalGram, you are
     given the option of replying with a STORE & FWD when the
     recipient matches one of the addresses stored at the GCC. If this
     is the case, the subject will be left out of the message and is
     replaced by SF: (time) in the MESSAGE LIST. When replying to
     a STANDARD GlobalGram, with a STANDARD GlobalGram,
     the subject field will contain the title "Re: subject", where subject
     is the subject that was contained in the received message. If the
     subject field on the received message was blank the reply will
     read "Re: . If the subject is greater than 76 characters, the
     "Re:" will appear at the beginning and the original subject will be
     shortened to fit the seventy-nine (79) character limit. You can
     edit the subject of your reply message and, if desired, the
     response can appear in the subject field.
        Pressing the REPLY softkey, while
                                                                          C
                                                         OR
                                                              B
                                                                          A
                                                                          P     3:14P

        viewing the message, brings you to        TO:
                                                  donsmith@flop.
        the TO screen. The address of the         com
        recipient, or previous sender, will
        already be present. Press the CC
        softkey and enter a carbon-copy
        recipient, if needed.                       CC            ADBK   SAVE   SEND




58                  Magellan GSC 100 Global Satellite Communicator
     After entering a carbon-copy                   OR
                                                         B
                                                              C
                                                              A
                                                              P     3:16P

     recipient, press the SUBJ softkey.     SUBJECT:
     This will bring you to the             Re:Meeting
                                            Change
     SUBJECT screen, with the subject
     from the previous message already
     inserted. There will be a "Re:"
     before the subject alerting the         TEXT            SAVE   SEND

     recipient that it is a reply to the
     message they had sent you. Press
     the TEXT softkey which will bring              OR        C
                                                         B    A
                                                                    3:18P
     you to the TEXT screen, where you      TEXT:
                                                              P




     will type in your reply. After         DUE TO A FLIGHT
     typing in your reply, press the        DELAY, I WILL BE
                                            UNABLE TO
     SEND softkey. You are returned to      ATTEND THE
     the MESSAGE LIST with your new         MEETING. I'LL
                                            CALL WHEN I GET
     message highlighted and a mailbox
                                              TO             SAVE   SEND
     icon next to it.

 Forwarding a GlobalGram
  The FWD feature allows you to forward a GlobalGram you
  receive to additional recipients. The procedure for forwarding a
  GlobalGram is the same as when "CREATING A
  GLOBALGRAM" although the subject and text fields will
  contain the information contained in the original received
  message. If the message is less than 229 characters and the
  forward recipient is pre-listed, as a speed-dial address, at the
  GCC, then you will be able to send the message as a STORE &
  FWD. If you choose to send the message as a STORE & FWD
  then the subject will be ignored and only the text will appear in
  the STORE & FWD to be forwarded.




Magellan GSC 100 Global Satellite Communicator                         59
     When you are reading a received             GP
                                                   S                         1:07P

     GlobalGram you will have a               MESSAGE TYPE
     softkey option to FWD the
                                                     STORE & FWD
     GlobalGram. Press the FWD                       STANDARD
     softkey. This brings you to the
     MESSAGE TYPE screen where you
     will have the options of STORE &
     FWD or STANDARD. If the
     recipient(s) is listed as a speed-dial
     address at the GCC and you are not
     in contact with your preferred GCC,
     then you will be able to send a
     STORE & FWD. Otherwise you
     will use the UP/DOWN ARROWs
     to highlight STANDARD and press
     ENTER. You will then be brought
     to the TO screen where you will
     enter the address of the person, or
     people, to receive this forwarded
     message. Press the CC softkey,
     enter any carbon copy recipients.
     Continue to the SUBJECT screen,                OR
                                                         B
                                                                      C
                                                                      A
                                                                      P     1:13P

     by pressing the SUBJ softkey.            SUBJECT:
                                              Fwd:LATE
     There will be a "FWD:" before the        ARRIVAL
     subject alerting the recipient that it
     is a forwarded message. You will
     then press the SEND softkey,
     unless you wish to edit the              TEXT                   SAVE   SEND

     message, to send this message to
                                                     OR

     the specified recipient. The                         B                 1:17P
                                               Boat Keys
     forwarded GlobalGram is now sent
                                               Flight Informa
     to the MESSAGE LIST, to be sent at        Meeting Change
     the next transmission, with a             Boat Keys
     mailbox icon next to it and the           Fwd:LATE ARRI
     subject field reflecting that the         Rental Car
                                              NEW            MSTAT   ADBK   DEL
     message is a FWD GlobalGram.

60               Magellan GSC 100 Global Satellite Communicator
 Deleting a Message
  The DEL function allows you to delete any GlobalGrams from
  the unit, created or received. Once the message has been deleted
  you will not be able to retrieve it at any time.
     To DELETE a GlobalGram, access               OR
                                                        B                 1:17P

     the MESSAGE LIST and highlight           FWD:Boat Keys
     the message to be deleted, using the     Flight Informa
                                              Meeting change
     UP/DOWN ARROWs. Press
                                              Boat Keys
     ENTER to access the message to
                                              LATE ARRIVAL
     be deleted and press the DEL             Rental Car
     softkey. Any time you attempt to       NEW            MSTAT   ADBK   DEL

     delete a GlobalGram you will be           OR
                                                    B                     1:22P

     prompted to confirm this request.         ATTENTION!
     This gives you the last minute          DELETE MESSAGE?
                                               LATE ARRIVAL
     option of not deleting the message.
     Press the YES softkey to confirm
     the deletion.
                                                            YES    NO




     If the message to be deleted has             OR
                                                       B                  1:22P

     been SENT to the mailbox, or is           ATTENTION!
                                              THIS MESSAGE IS
     awaiting acknowledgment, then             IN THE MAILBOX
     you will also be alerted to this and       AND CAN NOT
     prompted to continue.                        BE SENT IF
                                                   DELETED
                                             DELETE MESSAGE?
                                                            YES     NO




Magellan GSC 100 Global Satellite Communicator                              61
Message Status
     The MSTAT feature allows you to view information regarding
     GlobalGrams you have created and received, such as time and
     date created, its size, the time it was sent, the time of transmission
     to an ORBCOMM satellite and the last acknowledgment
     received.
       To access the status information for          OR
                                                          B         10:31A

       a given GlobalGram you need to                M S G ST A T U S
                                                 CREATED:
       access the MESSAGE LIST, use the            10:14:26A
                                                   10DEC97
       UP/DOWN ARROWs to highlight               SIZE:
       the desired message and press the           83 CHARACTERS
                                                 SENT:
       MSTAT softkey. You are now                  10:15:41A
       brought to the MSG STATUS                  VIEW

       screen, where the information
       regarding this GlobalGram is logged. Since there is too much
       data to fit on one screen, you will need to use the UP/DOWN
       ARROWs to scroll through data not shown on the initial
       screen. You will also have the softkey option to VIEW the
       message. The time a message is sent is defined as the time that
       it was put in the mailbox to be transmitted on the next
       available satellite pass, or the time you pressed the SEND
       softkey after creating the message. Time of transmission is
       defined as the time at which the GlobalGram was transmitted
       to an ORBCOMM satellite from your receiver. The time and
       date created is recorded when the message is saved and the file
       size is recorded in bytes and represents the total number of
       characters to be transmitted including the text, subject and
       recipients. Also, the time and date the message was sent will
       be the time and date of the unit clock when the message is sent
       to the mailbox. If you re-send a GlobalGram, then the
       previous status information will be updated with the current
       information.




62                  Magellan GSC 100 Global Satellite Communicator
 GPS Operations

  This section aids in the setup and operation of the GPS portion of
  your GSC 100.

 Selecting GPS Mode
  Although it is recommended that you operate your GSC 100 in
  the AUTO mode, there are times when you will need to operate
  solely in the GPS mode. To select GPS mode complete the
  following steps:
     While in the MAIN MENU, press                                  10:26A

     the MNU key to bring up a pop-up           MAIN MENU
                                               C  HECK M
                                               ORBCOMM        SGS
                                                             SATS
     menu. You will have the options of
                                            0 8M
                                               :01A I L0
                                                   10
                                                    P   B
                                                        T0OX
                                                          O 08
                                                             0 0:n16P
     CONTRAST and SYS MODE.                 0 9C
                                               :0 O1N
                                                    P TT ROAS09
                                                                 M
                                                               T: 1 4 P
     Use the UP/DOWN ARROWs to                 UNREAD
                                               S  YS MO    MSGS
                                                            DE        0
     highlight SYS MODE and press              QUEUED MSGS              0
     ENTER. This brings you to the           MSGS     GPS   SETUP   SATS

     SYS MODE screen where you will
     use the UP/DOWN ARROWs to                                      10:28A
                                              SYSTEM MODE
     highlight GPS MODE and then
                                            AUTO MODE
     press ENTER. This activates the        GPS MODE
     GPS Mode and returns you to the        ORBCOMM MODE
     MAIN MENU with the GPS icon
     shown in the icon bar. You can
     now operate your GPS functions
     without interference from                  GP
                                                                    10:30A
     ORBCOMM messaging. From                      S


                                                MAIN MENU
     many of the subsequent screens,           ORBCOMM SATS
     both in GPS and ORBCOMM                0 8 : 11 P T O 0 8 : 1 6 P
     modes, you will be able to change      09:01P TO 09:14P
     modes by pressing the MNU key             UNREAD MSGS 0
     and following the above                   QUEUED MSGS 0
                                             MSGS     GPS   SETUP   SATS
     instructions.




Magellan GSC 100 Global Satellite Communicator                         63
GPS Icons
     During GPS operations the following icons will be displayed in
     the status bar. For a complete list of icons refer to the ICONS
     appendix located at the back of this manual.
                 Arrow Key. Provides a visual indication as to which arrow
                 keys are active for the displayed screen. There are different
                 combinations of keys, as shown.
         !       Poor GQ Alert. The geometric quality (GQ) of the satellite
                 is poor. Try to move away from any large obstructions that
                 may be blocking reception of satellite signals.
     2
         d       2D. Displayed when the unit is calculating a two-
                 dimensional position fix using three satellites (e.g. latitude
                 and longitude).
     3
         d       3D. Displayed when the unit is calculating a three-
                 dimensional position fix using four satellites (e.g. latitude,
                 longitude and elevation).
     D           Differential. Indicates that the receiver is utilizing DGPS to
                 compute position fixes. Requires an additional Differential
                 Beacon receiver to utilize DGPS.
                 Old Data. The receiver has not updated position fixes for
                 more than 15 seconds.
     S           Simulator. Indicates that the receiver is in GPS simulation
                 mode. The simulator will stay active until the unit is turned
                 off.
     OR          ORBCOMM Mode. Displayed when the unit is operating
             B
                 in the ORBCOMM mode.
     GP
       S         GPS Mode. Displayed when the unit is operating in the
                 GPS mode.




64                         Magellan GSC 100 Global Satellite Communicator
 NAV Screens
  The three NAV screens accessible from pressing the NAV softkey
  are the POSITION, NAV 1 and NAV 2 screens. You may scroll
  through these screens using the NAV softkey or the UP/DOWN
  ARROWs. Press NAV until the POSITION screen is displayed.
 Viewing the POSITION Screen
  The POSITION screen displays the coordinates and elevation of
  the current position in a larger format so that they may be easily
  viewed from a distance. Once the unit calculates a position fix,
  the word "SEARCHING" will be replaced by "WGS-84". WGS-
  84 represents the map datum that the unit has as its default.


                           Old Data
                           Icon*
    Mode                                     GP
                                               S                              11:26A                    Current Time
    Designation                                    LAT/LON
    Icon*
                                          34 06.58N                                                     Latitude
                                         117 49.54W                                                     Longitude
                                                        900 FT                                              Elevation
    Softkey                                        SEARCHING                                                Position Fix Status
    Designations                           NAV        PLOT          GOTO          AUX
                                                                                                            (Replaced by Map Datum when
                                                                                                            fix is obtained)
       * For a complete description of the GPS Icons, refer to the chapter on ICONS located at the end of this manual.




Magellan GSC 100 Global Satellite Communicator                                                                                            65
Viewing the NAV 1 Screen
     Press the NAV softkey, or the UP/DOWN ARROWs, until the
     NAV 1 screen appears, showing BRG, DST, COG and SOG. This
     screen provides you with information about your speed and
     direction of movement. If a route is active, the NAV 1 screen also
     tells you where you are in relation to the destination and
     courseline, and displays the name of the destination waypoint of
     the active leg in the title bar.
                              Mode Designation & Old Data Icons*
            Current                          GP
                                               S                                   2:03P                   Current Time
            Destination                            TO            FISH
                                         BRG                            DST                                 Distance to
            Bearing to                                                                                      Destination
            Destination                 202         1.92
                                                     m
                                                                                    n
                                                                                    m
                                                                                                            Speed
            Course Over                 206m 21.7 kT                                                        Over Ground
            Ground                      COG           SOG
                                       [ . . . . . . ]1.0                      n
                                                                               m                           XTE Scale
             Cross Track                   NAV        PLOT           GOTO          AUX                     and Units
             Error (XTE)
           * For a complete description of the GPS Icons, refer to the chapter on ICONS located at the end of this manual.

     The default fields include bearing (BRG) to the active waypoint,
     distance (DST), course over ground (COG) and speed over
     ground (SOG). By using customize, refer to Customizing the
     NAV Screens, you may select VMG (velocity made good), SOA
     (speed of approach), STR (steering), CTS (course to steer) or a
     blank line. (See Customizing the Navigation Screens).
Viewing the NAV 2 Screen
     Press the NAV softkey or use the UP/DOWN ARROWs to scroll
     to the NAV 2 screen. The NAV 2 screen displays three additional
     information fields which can also be customized.




66                           Magellan GSC 100 Global Satellite Communicator
                                     Mode Designation & Old Data Icons*
       Current                                   GP
                                                   S                                  3:53P                   Current Time
       Destination                           TO                      FISH
       Bearing to
       Destination
                                          BRG                   202 m
                                                                                                      Direction of
       Course                             COG                   256 m                                 Cross Track
       Over Ground                                                                                    Error
                                                                      n
       Cross
                                          XTE                   1. 2 3m
                                             NAV         PLOT         GOTO           AUX
       Track Error
         * For a complete description of the GPS Icons, refer to the chapter on ICONS located at the end of this manual.

  Information is displayed in a large format so that it may be easily
  viewed from a distance. All of the fields can be customized.
  Default fields include bearing (BRG) to the active waypoint,
  course over ground (COG) and cross track error (XTE). By
  customizing, you may select VMG (velocity made good), SOA
  (speed of approach), SOG (speed over ground), ETA (estimated
  time of arrival), TTG (time to go), DST (distance), XTE (cross
  track error), STR (steering), CTS (course to steer) or a blank line.
  Cross track error (XTE) is displayed as a numeric value. The
  arrow next to XTE indicates the direction of the error, left or right
  of the course line.

 Customizing the NAV Screens
  As previously mentioned, NAV 1 and NAV 2 screens can be
  customized to display the data fields you find most convenient for
  navigation.
  When you access these two screens for the first time, the fields
  shown are the default choices. The NAV 1 screen displays BRG,
  DST, COG and SOG fields, while the NAV 2 screen displays
  BRG, COG and XTE fields.
  Available options include:
     BRG              Bearing to active waypoint
     DST              Distance to the active waypoint
     SOG              Speed Over Ground


Magellan GSC 100 Global Satellite Communicator                                                                               67
       COG       Course Over Ground
       ETA       Estimated time of arrival to the active waypoint
       TTG       Time To Go
       VMG       Velocity made good toward active waypoint
       XTE       Cross track error
       SOA       Speed of Approach toward active waypoint
       CTS       Course to steer
       STR       Steering
       Press the NAV softkey from any screen to view a NAV screen.
       Press the NAV softkey again, as necessary, to display either the
       NAV 1 or NAV 2 screen.
       Pressing MNU displays the pop-up
                                                    SAVE POS
       menu. Use the UP/DOWN ARROWs
                                                    CREATE WPT
       to highlight CUSTOMIZE and press             ROUTE MENU
       ENTER. The pop-up menu                       CONTRAST
       disappears and the display returns to        CUSTOMIZE
       the previously viewed NAV screen.            SYS MODE
NAV 1 Screen
     When the pop-up menu disappears and the display returns to the
     NAV 1 screen, the first field is highlighted. The first default is
     BRG, but another option may appear if you have previously
     customized the fields.
       Use the UP/DOWN ARROWs to select the field to edit, and
       the LEFT/RIGHT ARROWs to scroll through the various
       options. After you have selected an option, press the UP/
       DOWN ARROWs to move to the next field, where you scroll
       through the list of options again using the LEFT/RIGHT
       ARROWs. When you have finished selecting all of the
       options you wish to include in the NAV 1 screen display, press
       ENTER to exit and save the selections.



68                  Magellan GSC 100 Global Satellite Communicator
 NAV 2 Screen
  When the pop-up menu disappears and the display returns to the
  NAV 2 screen, the first default field heading "BRG" is
  highlighted.
     Use the UP/DOWN ARROWs to select the field to edit, and
     the LEFT/RIGHT ARROWs to scroll through the various
     options.
     After you have selected an option, press the UP/DOWN
     ARROWs to move to the next field, where you scroll through
     the list of options again using the LEFT/RIGHT ARROWs.
     When you have finished selecting all of the options you wish
     to include in the NAV 2 screen, press ENTER to exit and save
     the selections.

 PLOT Screens
  Three graphical screens can be accessed from the softkey
  corresponding to PLOT: the PLOT screen, the ROAD screen and
  the POINTER screen. You may scroll through these three screens
  by pressing the PLOT softkey repeatedly, once you have
  accessed one of the PLOT screens, or by using the UP/DOWN
  ARROWs.
 Viewing the POINTER Screen
  Access the POINTER screen by pressing the PLOT softkey (two
  or three times, if necessary). This screen graphically displays the
  TO destination waypoint of the current leg if there is an active
  route or GOTO and the bearing and distance to that waypoint. An
  arrow inside the arc points toward the destination of the active
  leg, shown as a waypoint icon.




Magellan GSC 100 Global Satellite Communicator                    69
           Current                            GP
                                                S                                     1:19P                    Current Time
           Destination                              TO             JETTY
                                                                   N                                           Destination
          Cardinal                                                                                             Icon **
          Heading                                                                                              COG Indicator *
          Bearing to                          BRG                                DST       E
                                                                                   n                           Distance to
          Destination                   0 2 8m                              1 3 . 5m                           Destination
                                             NAV            PLOT       GOTO          AUX



                                                                             Bearing
                                                                             Indicator *
                           * Displayed only if receiver is moving.
                          ** The destination icon disappears if it extends past the displayed arc (is behind you).

Viewing the PLOT Screen
     This screen plots your route on the display using the arrow icon to
     display your relative position on the route. Your track is also
     displayed, allowing you to follow your movement in relation to
     the course.
       Press the PLOT softkey, as necessary, to access the PLOT
       screen. If many of the waypoints you have created are
       contained in the current display range, the screen may take
       several seconds to redraw.

                                              GP
                                                S
                                                    2
                                                        d                            2:26P
                                                                                           n
                                                                                                               Current Time
                                        BRGT
                                           202
                                             Om                      FD
                                                                      ISST
                                                                         H 1.92 m
                                                                                                               Distance to
            Bearing to                   N
                                                                                                               Destination
            Destination

            Destination Icon

            Present                                                                     n
                                                                                       1m                      Intended Course
            Position                      NAV               PLOT       GOTO         AUX


     The PLOT screen displays the bearing and distance to a
     destination waypoint if there is an active route or GOTO.




70                             Magellan GSC 100 Global Satellite Communicator
 Changing the Plotter Scale
     While in the PLOT screen, press the LEFT/RIGHT
     ARROWs to adjust the scale. The plot scale is shown at the
     bottom right corner of the screen.
 Using PAN N SCAN
  The PLOT screen is equipped with a PAN N SCAN feature that
  allows you to access waypoint information by positioning the
  cursor over the waypoint.
     From the PLOT screen, press MNU
                                                       SAVE POS
     to access the pop-up menu. You
                                                       CREATE WPT
     will notice that this menu is                     ROUTE MENU
     different from the pop-up menu                    CONTRAST
     accessed from other screens in that               PAN N SCAN
     it has an additional feature, PAN N               SYS MODE
     SCAN.
     Using the UP/DOWN ARROWs, highlight PAN N SCAN and
     press ENTER.
                                                   GP    2
     The PAN N SCAN screen is similar                S       d                   2:26P
                                                   TN
                                                  PA ONF
                                                       SI C
                                                          SAHN
     to the PLOT screen, however a           B R G 202 m                            n
                                                                         D S T 1.92 m
     vertical and horizontal line cross to   N

     form a cursor. The bearing (BRG)
     and distance (DST) from your
     present position to the cursor are                                            n
                                                                                  1m
                                                 NAV             PLOT   GOTO    AUX
     displayed at the top of the screen.
                                                   GP    2
     Use the UP/DOWN and LEFT/                       S       d                   2:26P
                                                       TO               DOCK
     RIGHT ARROWs to move the                B R G 202 m                            n
                                                                         D S T 1.92 m
     cursor anywhere on the screen or to     N

     scroll off the screen to view
     portions of the active route not
     currently shown on the screen.                                                n
                                                                                  1m
                                             NAV                 PLOT   GOTO    AUX




Magellan GSC 100 Global Satellite Communicator                                     71
     When the cursor covers a waypoint icon on the screen, the title
     bar displays the name of that waypoint and the bearing and
     distance to the waypoint from your present position.
Setting a GOTO Using PAN N SCAN
     When the cursor is on an icon and the waypoint information is
     displayed, press ENTER.
                                                      GP
       A pop-up menu will appear with                   S
                                                            2
                                                                d               2:26P
                                                          TO           DOCK
       the options GOTO or ESCAPE.              B R G 202 m                        n
                                                                        D S T 1.92 m
       Use the UP/DOWN ARROWs to                N   CREATE WPT
       highlight GOTO and press                     G O0
                                                       TO
       ENTER. This will activate an
                                                     0   0 0 0 0n
                                                                M


       immediate GOTO route to the                                                n
                                                                                 1m
                                                    NAV         PLOT   GOTO    AUX
       specified destination.
       To exit the PAN N SCAN screen, press ENTER when no
       waypoint is covered by the cursor. The display returns to the
       PLOT screen.
Clearing Plotter Track
     As you use your receiver more, you may soon notice the PLOT
     screen becoming cluttered with the graphic display of your past
     movement (track). You can erase the track display with the
     CLEAR MENU option in the AUXILIARY MENU.
       Press the AUX softkey and use the UP/DOWN ARROWs to
       highlight CLEAR MENU. Press ENTER and use the UP/
       DOWN ARROWs to highlight TRACK and press ENTER.
       You will be asked to confirm that you want to erase the track
       history. If you change your mind, press any other key to leave
       the track as it is. To erase track history press the YES softkey.




72                 Magellan GSC 100 Global Satellite Communicator
 Viewing the ROAD Screen
  Access the ROAD screen by pressing the PLOT softkey (two or
  three times, if necessary). This is the navigation CDI screen. As
  with the preceding screen, the bearing and distance to the leg
  destination are displayed.
  This screen depicts the course you should be on as the center line
  and position relative to the course (the arrow icon). Any
  waypoints that would appear on or near this courseline are
  displayed as they come into range.

       Current           GP
                           S                   4:26P   Current Time
       Destination             TO       DOCK
                                                   n
                      BRG028m            DST13.5   m   Distance to
       Bearing to                                      Destination
       Destination
                                                       Destination Icon
         Cross
         Track                    n
                               4.0m                    Scale
         Error         NAV       PLOT   GOTO   AUX


  When a route is active, you can adjust the CDI scale by pressing
  the LEFT/RIGHT ARROWs shown in the bottom left corner of
  the screen.

 Waypoints
 Saving a Position Fix as a Waypoint
  During normal operation your receiver continuously computes
  your position and displays that information on the POSITION
  screen. Quite often you will want to store the position data for
  later use. This stored fix is referred to as a waypoint. An obvious
  use would be to store the position where you are now with a
  unique name. That way if you were to go to a new location you
  could use your receiver to guide you back to your current
  location.




Magellan GSC 100 Global Satellite Communicator                            73
       From any NAV or PLOT screen, press the MNU key. Using
       the UP/DOWN ARROWs, highlight SAVE POS and press
       ENTER. Using either the UP/DOWN ARROWs or the
       ALPHANUMERIC KEYS, assign an icon and name to your
       position and press ENTER.
Receiver Generated Waypoint Name
       From any NAV or PLOT screen, press the MNU key. Using
       the UP/DOWN ARROWs, highlight SAVE POS and press
       ENTER. You will then press the ENTER key again to
       confirm your entry.
User Defined Waypoint Name
       From any NAV or PLOT screen,                 GP
                                                      S
                                                          2
                                                              d
                                                                  C
                                                                 1:26P
                                                                  A
                                                                  P




       press MNU, highlight SAVE POS               SAVE POS
       and press ENTER. This tells the
                                                       34 11.00N
       receiver that you want to store the
                                                     119 43.02W
       current position as a waypoint. The
                                                           900 FT
       cursor is in the upper left corner of
       the display and the arrow icons, at     NAV    PLOT  GOTO AUX

       the top of the screen, indicate that it
       is in the edit mode. What you will do next is assign a name to
       this position.
     The waypoint name can be created by the receiver or you can
     input a name that means something to you. If you press ENTER
     without creating a name the receiver assigns a waypoint name.
     Waypoint names assigned by the receiver appear in the format
     WPxxx, where the xxx is a sequential number (001, 002, etc.)
     with a pin icon in front, alerting you that the waypoint is receiver-
     generated.




74                  Magellan GSC 100 Global Satellite Communicator
     To allow the receiver to name the         GP
                                                 S
                                                     2
                                                         d
                                                                          C
                                                                          A
                                                                          P   1:41P

     waypoint, press ENTER. The                      SAVE POS
                                             WP001
     following screen will appear briefly
                                                 34 11.00N
     and then the receiver returns to the      119 43.02W
     POSITION screen.                          900 FT
                                             01:54P02SEP97
     or                                      NAV             PLOT   GOTO      AUX


     Use the ARROW KEYS, or                    GP
                                                 S
                                                     2
                                                         d
                                                                          C
                                                                          A
                                                                          P   1:54P

     ALPHANUMERIC KEYS, to                         SAVE POS
                                             DOCK
     type in a waypoint name that
                                                34 11.00N
     describes the position being saved.       119 43.02W
     A waypoint name always starts             900 FT
     with an identifier icon and 1 to 5      01:54P02SEP97
     characters. After assigning a name,     NAV             PLOT   GOTO      AUX

     press ENTER. This screen, shown
     at right, will appear briefly and
     then the receiver returns to the last
     viewed NAV or PLOT screen.
 Creating a Waypoint
  This allows you to create and store a waypoint with a receiver-
  generated name or user-assigned name and allows you to assign
  the position coordinates.
     From any NAV or PLOT screen, press MNU, highlight
     CREATE WPT and press ENTER. The CREATE WPT screen
     appears. Press ENTER to accept a receiver-generated name or
     use the ARROW KEYS, or ALPHANUMERIC KEYS, to
     assign a name of your choice and press ENTER.
     The cursor moves to the first line of     GP
                                                 S
                                                     2
                                                         d
                                                                      C
                                                                      A
                                                                      P       1:54P

     the position. You can either use the     CREATE WPT
                                             DOCK
     ALPHANUMERIC KEYS to type
                                                34 11.00N
     in the coordinates or use the UP/         119 43.02W
     DOWN ARROWs to scroll                       900 FT
     through the number list Use the
     LEFT/RIGHT ARROWs to move               NAV             PLOT   GOTO      AUX




Magellan GSC 100 Global Satellite Communicator                                  75
       the cursor. If using LAT/LON coordinate system, the UP/
       DOWN ARROWs toggle between N and S. Press ENTER to
       confirm and continue.
                                                  GP                     C

       Using the ALPHANUMERIC                       S
                                                        2
                                                            d            A
                                                                         P    1:54P
                                                 CREATE WPT
       KEYS or LEFT/RIGHT and UP/
                                                DOCK
       DOWN ARROWs you can change                  34 11.00N
       the second line of the position. If        117 43.02W
       using LAT/LON coordinate system,              900 FT
       the UP/DOWN ARROWs toggle
       between E and W. Press ENTER             NAV             PLOT   GOTO   AUX

       to save the changes.
     You may now assign the elevation. If you do not know the
     elevation, press ENTER to accept the displayed value. In a few
     seconds the new waypoint is saved and the receiver returns to the
     NAV screen from which you started.
Accessing the Waypoint Menu
     The WAYPOINT MENU contains up to 200 named waypoints,
     displayed in two columns of four waypoints each and extending
     several pages.
                                                  GP    2
       To access the WAYPOINT MENU,                 S       d                 4:24P
                                                      WPT MENU
       press the AUX softkey from any
                                               CREATE
       NAV or PLOT screen. This brings         POS
       you to the AUXILIARY MENU                DOCK
       where you will use the UP/DOWN           WP001
       ARROWs to highlight
       WAYPOINTS and press ENTER.               NAV             PLOT   GOTO   AUX


       This will take you to the WPT
       MENU screen. This is a listing of
       all the waypoints you have stored
       in your receiver.




76                 Magellan GSC 100 Global Satellite Communicator
  As the number of waypoints in the library increases, the WPT
  MENU screen will add a second column of four waypoint names
  to the right of the ones you have now, and will continue to
  another "page." Use the LEFT/RIGHT ARROWs to move from
  column to column and the UP/DOWN ARROWs to move up and
  down through the list. When you reach the end of the page, the
  cursor will automatically scroll to the next page.
 Viewing a Waypoint
                                              GP    2
                                                S       d                    1:53P
     While in any NAV or PLOT screen,             WPT MENU
     press the AUX softkey. Using the      CREATE
     UP/DOWN ARROWs, highlight             POS
     WAYPOINTS and press ENTER.             DOCK
                                            WP001
     Use the UP/DOWN and LEFT/
     RIGHT ARROWs to highlight the
                                            NAV             PLOT    GOTO     AUX
     waypoint you wish to view and
     press ENTER to display the
                                              GP    2
                                                                             1:54P
     WAYPOINT screen. This screen               S       d


                                                  WAYPOINT
     closely resembles the POSITION          DOCK
     screen with the notable addition of         34 11.00N
     the time and date the waypoint was        119 43.02W
     saved. Use the LEFT or RIGHT              9 0 0 F T WGS84
     ARROW to display the                   01:54P02SEP97
                                            NAV             PLOT    GOTO     AUX
     WAYPOINT screen for adjacent
     waypoints in the list. Continue
     pressing the LEFT or RIGHT
     ARROW to scroll through the
     entire list.
                                              GP    2
                                                                             1:27P
     The UP/DOWN ARROWs give                    S       d


                                               TO                  DOCK
     the bearing (BRG) and distance
     (DST) for the selected waypoint on
     the POINTER screen.
                                           E BRG                           DST
                                                                             n
                                           0 2 8m                     1 3 . 5m
                                            NAV             PLOT    GOTO     AUX




Magellan GSC 100 Global Satellite Communicator                                   77
Accessing the Waypoint Function Menu
       From any NAV or PLOT screen,              GP
                                                   S
                                                       2
                                                           d                 1:54P

       press the AUX softkey. Use the                WAYPOINT
                                               DEODC ITK
       UP/DOWN ARROWs to select                 W P T 3P  4R 1O1J .E0C0N
       WAYPOINTS and press ENTER.               SUN     R I S E
                                                      119 43.02W
       Select a waypoint from the list and      D E9 L0 E0TFET W G S 8 4
       press ENTER to access the               0 1 : 5 4 P 0 2D
                                                S Y  S   M  O SEEP97
       WAYPOINT screen, then press             NAV             PLOT   GOTO   AUX

       MNU to access a menu of
       functions.
Editing a Waypoint
     This enables you to rename a waypoint (optional) and to change
     the coordinate values for the waypoint.
       From any NAV or PLOT screen, press the AUX softkey. Use
       the UP/DOWN ARROWs to select WAYPOINTS and press
       ENTER. Select a waypoint from the list and press ENTER to
       access the WAYPOINT screen. Press MNU to access the
       function menu, highlight EDIT and press ENTER.
       Changing the name of the waypoint is the first option. Use the
       LEFT/RIGHT ARROWs to move the cursor and the UP/
       DOWN ARROWs to select the characters. After changing the
       waypoint name or, if there are no changes to the waypoint
       name, press ENTER.
       Make changes to the position, using the UP/DOWN
       ARROWs to scroll through the number list, and the LEFT/
       RIGHT ARROWs to move left and right. Press ENTER to
       accept the changes. After all changes are made to the position
       and elevation, press ENTER. In a few seconds the changes
       will be saved and the receiver returns you to the WAYPOINT
       screen of the edited waypoint. Any name, or coordinate,
       changes that you made while editing, have been saved,
       replacing the former name and/or coordinates.


78                 Magellan GSC 100 Global Satellite Communicator
       If you attempt t edit a waypoint contained in a route, a warning
       message will appear: "WARNING - WPT USED IN A ROUTE
       ENTER TO CONTINUE." You must first delete the waypoint
       from the route, or delete the route, before modifying the waypoint.

 Projecting a Waypoint
  This function allows you to project a waypoint, which means to
  create a waypoint at a certain distance and bearing from an
  existing waypoint.
     From any NAV or PLOT screen,                  GP
                                                     S
                                                         2
                                                             12:42P
                                                             d



     press the AUX softkey. Use the          WPT PROJECT
     UP/DOWN ARROWs to select              FROM        DOCK
     WAYPOINTS and press ENTER.            D I S T
     Select the waypoint in the list from  BRG
     which you wish to project a new
     waypoint, then press ENTER to           NAV   PLOT GOTO  AUX

     access the WAYPOINT screen.
     Press MNU to access the function menu, highlight WPT
     PROJEC and press ENTER. The WPT PROJECT screen
     appears with the "FROM" waypoint highlighted, allowing you
     to choose which waypoint you will be projecting from. Use
     the LEFT/RIGHT ARROWs to scroll through the list of
     available "stored" waypoints from which to choose. Press
     ENTER.
     Use the UP/DOWN and LEFT/                     GP
                                                     S
                                                         2
                                                             d
                                                                           A
                                                                           L
                                                                           T
                                                                               12:42P

     RIGHT ARROWs to key in the                  WPT PROJECT
                                                FROM                DOCK
     distance at which you wish to
                                                                           n
     project the new waypoint. When             DIST              0 0 0 . 0m
     you have finished, press ENTER to          BRG
     confirm and continue.
                                                 NAV             PLOT   GOTO   AUX




Magellan GSC 100 Global Satellite Communicator                                    79
       The cursor appears in the bearing        GP
                                                  S
                                                      2
                                                          d
                                                                             A
                                                                             L
                                                                             T
                                                                                 12:52P

       field (BRG). Use the UP/DOWN            WPT PROJECT
       and LEFT/RIGHT ARROWs to              FROM                    DOCK
                                                                         n
       key in the bearing at which you       DIST               0 1 3 . 5m
       wish to project the new waypoint.     BRG                0 0 0m
       When you have finished, press
       ENTER to confirm.                      NAV             PLOT    GOTO       AUX


       The coordinates of the projected         GP
                                                  S
                                                      2
                                                          d                      2:02P

       waypoint you have just created          WPT PROJECT
       appear on the WPT PROJECT                       34 02.00N
       screen.                                        118 43.02W
                                                         899 FT

                                              NAV             PLOT    GOTO       AUX


                                                GP                       C
                                                      2
       To save these coordinates as a             S       d              A
                                                                         P       1:22P

                                               DEFINE WPT
       waypoint, press ENTER to access
       the DEFINE WPT screen. Assign a                 34 11.00N
       name using the UP/DOWN and                     119 43.02W
       LEFT/RIGHT ARROWs, then                           900 FT
       press ENTER.
                                              NAV             PLOT    GOTO       AUX



     The projected waypoint is saved as a new waypoint and the
     display returns to the WAYPOINT screen from which you
     projected the new waypoint.
Deleting a Waypoint
     The DELETE function is used to permanently remove a waypoint
     from your receiver's memory.
       From any NAV or PLOT screen, press the AUX softkey. Use
       the UP/DOWN ARROWs to select WAYPOINTS and press
       ENTER. Select the waypoint in the list you wish to delete,
       then press ENTER to access the WAYPOINT screen. Now
       press MNU to access the function menu, highlight DELETE
       and press ENTER.

80                 Magellan GSC 100 Global Satellite Communicator
     The receiver will now give you one             GP
                                                      S
                                                          2
                                                              d              2:42P

     last chance to change your mind. If              WARNING
     you are sure, press the YES                DELETE                  DOCK
     softkey. The waypoint is now
     erased and you are returned to the
     next waypoint in the list.
                                                                  YES   NO




       Waypoints that are currently used in a route cannot be deleted
       (discussed in the next section). The receiver will warn you if you
       attempt to do so.


 Routes
  A route is a planned course of travel defined by a series of
  waypoints.




  To create a route, you must already have waypoints stored in the
  receiver's memory. These waypoints are then connected to form
  the segments, or "legs", of the route. A route may contain from
  one to fifteen legs.



Magellan GSC 100 Global Satellite Communicator                                 81
Activating a GOTO Route
     The GOTO function enables you to create a simple one-leg route
     from your present position to a defined waypoint. When a GOTO
     is active, the title bar of the NAV1, NAV2, POINTER and ROAD
     screens displays "TO Destination Waypoint" and the screens
     display the corresponding navigation information.
       From the MAIN MENU, press the                    GP
                                                          S
                                                              2
                                                                12:03P
                                                                  d



       GPS softkey. Press the GOTO                    GOTO
                                                 MOB
       softkey, use the UP/DOWN                  BCKTRK
       ARROWs to highlight the desired           ROUTE
       destination waypoint and press              FISH
                                                  DOCK
       ENTER. The first four selections
       in the GOTO MENU allow you to              NAV PLOT GOTO AUX

       activate a Man OverBoard (MOB),
       Backtrack (BCKTRK), to access the route menu to activate an
       existing route (ROUTE) or to activate a GOTO route with user
       defined coordinates. MOB, BCKTRK and COORD functions
       are discussed at the end of the this section.
     It is also possible to activate a GOTO from the PAN N SCAN
     feature on the PLOT screen as described earlier.
     The receiver has now activated a route from your present position
     to the destination waypoint you have just selected. The last
     viewed NAV screen is now displayed.

         If the receiver has not yet computed a position fix, then the start of
         the GOTO may not represent your current position. It will,
         however, correct the navigation information after a fix is acquired.


          If a route, GOTO or MOB is already active, the new GOTO
          automatically replaces it and becomes the active route.




82                  Magellan GSC 100 Global Satellite Communicator
 Accessing the Route Menu
  The ROUTE MENU is used to create and view up to five single or
  multi-leg routes. A pop-up menu allows you to activate,
  deactivate or reverse a selected route, edit or view the legs of the
  route or clear the route.
  The ROUTE MENU can be accessed in three ways:
     From any NAV or PLOT screen,               GP
                                                  S
                                                      2
                                                          d                  4:24P
                                                    AUX MENU
     press the AUX softkey. Use the
                                             ROUTE MENU
     UP/DOWN ARROWs to select                WAYPOINTS
     ROUTE MENU and press                    GPS SIMULATOR
     ENTER.                                  ODOMETER
                                             LAST FIXES
                                             CLEAR MENU
                                              NAV             PLOT   GOTO   AUX


                     or
     From any NAV or PLOT screen, press
     MNU to access the pop-up menu.                 SAVE POS
                                                    CREATE WPT
     Use the UP/DOWN ARROWs to
                                                    ROUTE MENU
     select ROUTE MENU and press                    CONTRAST
     ENTER.                                         WPT PROJEC
                                                    SYS MODE
                     or
     Press the GOTO softkey, highlight          GP
                                                  S
                                                      2
                                                          d                 12:03P

     ROUTE and press ENTER.                                   GOTO
                                             MOB
                                             BCKTRK
                                             ROUTE
                                              FISH
                                              DOCK

                                              NAV         PLOT       GOTO   AUX




Magellan GSC 100 Global Satellite Communicator                                 83
Creating a Multi-Leg Route
     This creates a route of 1 to 15 legs. Each leg has a start and end
     waypoint. Each end waypoint is the start waypoint for the
     following leg.
                                                       GP
       From any NAV or PLOT screen,                      S
                                                             2
                                                                 d                  2:54P
                                                       ROUTE MENU
       press the MNU key. Use the UP/
                                                  1.   EMPTY
       DOWN ARROWs to highlight                   2.   EMPTY
       ROUTE MENU and press ENTER                 3.   EMPTY
       to access the ROUTE MENU. Use              4.   EMPTY
       the UP/DOWN ARROWs to select               5.   EMPTY
       an EMPTY route and press                    NAV               PLOT    GOTO   AUX

       ENTER.

          If there are no EMPTY routes in the ROUTE MENU, you must
          clear a route before you can create a new one.


       Use the LEFT/RIGHT ARROWs                       GP
                                                         S
                                                             2
                                                                 d                  2:52P

       to select the FROM waypoint. This            SET ROUTE
       is the starting position for this leg of   LEG 01
                                                  FROM                  DOCK
       your route. The default waypoint in
       the FROM field is the current              TO
       position, labeled as STRT1, with a
       block icon in front. The "1"                NAV               PLOT    GOTO   AUX

       indicates that it is the START
       waypoint of Route 1. Press                      GP    2
                                                         S       d                  2:52P
       ENTER. The highlight bar moves               SET ROUTE
       down to the TO line. Use the               LEG 01
       LEFT/RIGHT ARROWs to change                FROM                      DOCK
       the TO waypoint to be the                  TO                        FISH
       destination for this leg. Note that the
                                                  1 6 7m                     1 0 . 5n
                                                                                    m
       screen displays the bearing and
                                                   NAV               PLOT    GOTO   AUX
       distance for this leg of the route.
       Press ENTER to confirm the TO waypoint.


84                  Magellan GSC 100 Global Satellite Communicator
     The receiver automatically used the            GP
                                                      S
                                                          2
                                                              d  2:52P

     TO waypoint from the previous leg          S E T  R O U T E
                                            LEG 02
     as the FROM waypoint for the next
                                            FROM         FISH
     leg. Continue to add legs to this
     route by using the LEFT/RIGHT          TO
     ARROWs changing the TO
     waypoint and ENTER to confirm.           NAV   PLOT  GOTO   AUX

     The bearing and distance are
     updated as you scroll through the various TO waypoints.
     When you have created as many legs of the route as desired,
     simply press ENTER with the TO highlight blank.


       The receiver will not accept a destination waypoint that is 0.1
       distance units from the previous waypoint.


  The display returns to the ROUTE MENU. The new route is now
  the active route and can be viewed on the NAV and PLOT screens.
 Activating and Deactivating a Route
  Only one MOB, BACKTRACK, COORD route or GOTO can be
  active (in use) at any time. When you set an MOB, GOTO or
  BACKTRACK route, any multi-leg route that you were using is
  automatically deactivated and replaced with the route you just set.
  Likewise, creating a multi-leg route makes that route the current
  active route, deactivating any other route.
     From any NAV or PLOT screen, press the MNU key. Use the
     UP/DOWN ARROWs to highlight ROUTE MENU and press
     ENTER. Use the UP/DOWN ARROWs to highlight the
     route you wish to activate or deactivate and press ENTER.
     Use the UP/DOWN ARROWs to highlight ACTIVATE or
     DEACTIVATE and press ENTER.




Magellan GSC 100 Global Satellite Communicator                           85
       If the route you selected is currently active, DEACTIVATE
       will appear on the menu, and pressing ENTER, after
       highlighting that option, will deactivate the route. To return to
       the ROUTE MENU you will press the ESCAPE (ESC) key. If
       the route is not active, ACTIVATE will appear on the menu,
       and pressing ENTER will activate the route and return you to
       the ROUTE MENU.
Reversing a Route
     The REVERSE function allows you to take an existing route and
     reverse the order of waypoints in the route. For example, if you
     were to set a route that went from point A to point B and ended at
     point C, REVERSE would change the route to go from point C to
     point B and ending at point A.
       From any NAV or PLOT screen, press the MNU key. Use the
       UP/DOWN ARROWs to highlight ROUTE MENU and press
       ENTER. Highlight the route you want to reverse and press
       ENTER. Use the UP/DOWN ARROWs to highlight
       REVERSE and press ENTER. The route is reversed and the
       display returns to the ROUTE MENU.
Viewing the Route Summary (Edit Option)
     The edit option displays a summary of the selected route,
     including starting and ending waypoints, number of legs and total
     distance. It allows you to view, insert, delete and replace
     individual legs of a route, as well as choose the leg on which you
     want to navigate by making this the current active leg.
       From any NAV or PLOT screen,               GP
                                                    S
                                                        2
                                                            d                 2:52P

       press the MNU key. Use the UP/              SUMMARY
                                               FROM    DOCK
       DOWN ARROWs to highlight
                                               TO       FISH
       ROUTE MENU and press
                                                4 LEGS
       ENTER. Use the UP/DOWN                  TOTAL 10.5 n m
       ARROWs to highlight the route           DIST
       you want to view and press               NAV             PLOT   GOTO   AUX

       ENTER. Use the UP/DOWN

86                 Magellan GSC 100 Global Satellite Communicator
     ARROWs to highlight EDIT and press ENTER. The
     SUMMARY screen for the selected route is displayed.
 Viewing the Legs of a Route
  This allows the legs of a route to be viewed. It is also the entry
  point from which legs can be added, removed or replaced.
     To review the route by viewing              GP
                                                   S
                                                       2
                                                           d                   3:32P

     each of the legs individually,                    LEG                1
                                              FROM                    DOCK
     starting from the SUMMARY                TO                       FISH
     screen, shown above, press the UP/
                                              1 6 7m                    10.5n
                                                                            m
     DOWN ARROWs stepping                      BRG                       DST
     through each leg of the route and
     back to the route summary.                NAV             PLOT    GOTO    AUX



 Inserting a Leg in a Route
  You can insert a leg in a route by inserting a waypoint between
  the starting and ending waypoints of an existing leg, thereby
  dividing it into two legs.
     From any NAV or PLOT screen,                GP
                                                   S
                                                       2
                                                           d                   4:24P

     press the MNU key. Use the UP/           EDIT LEG                           1
                                              ADD LEG
     DOWN ARROWs to highlight                 INSERT
     ROUTE MENU and press                     DELETE
     ENTER. Highlight the route to be         REPLACE
                                              NAVIGATE
     edited and press ENTER. Use the
     UP/DOWN ARROWs to highlight               NAV             PLOT    GOTO    AUX

     EDIT and press ENTER. Use the               GP
                                                   S
                                                       2
                                                           d                   2:52P
     UP/DOWN ARROWS to select                 INSERT LEG                        1
     the leg you want to edit and press      FROM                     DOCK
     ENTER. In the EDIT LEG menu,            TO                        FISH
     highlight INSERT and press              1 6 7m                     10.5n
                                                                            m
                                               BRG                       DST
     ENTER. A highlight bar appears
     for you to select the new TO              NAV             PLOT    GOTO    AUX
     waypoint for this leg.




Magellan GSC 100 Global Satellite Communicator                                   87
       Use the LEFT/RIGHT ARROWs to scroll through the
       waypoint list to the waypoint you wish to use as the destination
       for this new intermediate leg and press ENTER.
     The new leg has now been added. The FROM waypoint did not
     change but the TO waypoint is now the one you just entered. The
     receiver has updated the bearing and distance for this leg and
     displays it on the screen.
       Press the DOWN ARROW. The following leg has also been
       changed. The following leg now starts from the waypoint you
       designated as the TO waypoint for the previous leg.

          The new TO waypoint must have a distance greater than 0.1
          distance units from the "FROM" waypoint; the receiver will not
          insert a leg within 0.1 distance units but will return to the leg
          screen you were viewing.


Deleting a Leg
     Another feature of editing a route is the ability to delete one of
     the legs.
       From any NAV or PLOT screen, press the MNU key. Use the
       UP/DOWN ARROWs to highlight ROUTE MENU and press
       ENTER. Highlight the route to be edited and press ENTER.
       Highlight EDIT and press ENTER. Use the UP/DOWN
       ARROWs to view the route leg to be deleted. Press ENTER
       to access the EDIT LEG menu, highlight DELETE and press
       ENTER. The receiver gives you one last chance to change
       your mind. Press ENTER to confirm. The leg is removed
       from the route. Press any function key to abort the process.

          The new TO waypoint must be different from the old (must have a
          distance greater than 0.1 distance units from the "FROM"
          waypoint); the receiver will not insert a leg within 0.1 distance
          units but will return to the leg screen you were viewing.



88                  Magellan GSC 100 Global Satellite Communicator
 Adding a Leg
  You can add a leg to the end of the route in much the same way as
  you would insert a leg, only this time you add a waypoint to
  extend the end of the route beyond the original destination.
     From any NAV or PLOT screen, press the MNU key. Use the
     UP/DOWN ARROWs to highlight ROUTE MENU and press
     ENTER. Highlight the route to be edited, press ENTER. Use
     the UP/DOWN ARROWs to highlight EDIT and press
     ENTER. Use the UP/DOWN ARROWs to view the last leg
     in the route. Press ENTER to access the EDIT LEG menu,
     select ADD LEG and press ENTER.

        If ADD LEG does not appear as an option of the LEG EDIT
        menu, you were not viewing the final leg of the route. To add a
        leg to the end of a route, you must be viewing the final leg when
        you access the LEG EDIT menu. (To add a leg to a route, see
        Inserting a Leg in a Route).

                                                    GP    2                       3:32P
     The ADD LEG screen appears with                  S       d


                                                ADD LEG                             4
     the destination waypoint of the            FROM                     DOCK
     route in the FROM field. It is used        TO                        FISH
     as the starting point of the final leg
                                                1 6 7m                     10.5n
                                                                               m
     you wish to create. A highlight bar          BRG                       DST

     appears for you to select the new
                                                  NAV             PLOT    GOTO    AUX
     TO waypoint for this leg.
     Use the LEFT/RIGHT ARROWs to scroll through the
     waypoint list to the waypoint you wish to use as the destination
     for this new final leg and press ENTER.
  The new leg has now been added. The receiver displays the
  bearing and distance for this new final leg.




Magellan GSC 100 Global Satellite Communicator                                      89
Replacing a Waypoint
     This allows the destination (TO) waypoint of a leg to be changed
     to a different waypoint.
                                                      GP    2
       From any NAV or PLOT screen,                     S     3:32P
                                                                d


                                        REPLACE LEG 4
       press the MNU key. Use the UP/   FROM         DOCK
       DOWN ARROWs to highlight         TO            FISH
       ROUTE MENU and press
                                        1 6 7m          10.5n  m
       ENTER. Highlight the route to be   BRG             DST

       edited and press ENTER. Use the
                                          NAV   PLOT   GOTO   AUX
       UP/DOWN ARROWs to highlight
       EDIT and press ENTER. Use the
       UP/DOWN ARROWs to view the leg to be modified. Press
       ENTER to access the EDIT LEG menu, select REPLACE and
       press ENTER.
       A highlight bar appears for you to select the new TO waypoint
       for this leg, replacing the existing one.
       Use the LEFT/RIGHT ARROWs to scroll to the waypoint
       you wish to use as the new destination for this leg of the route
       and press ENTER.

         The new TO waypoint must have a distance greater than 0.1
         distance units from the "FROM" waypoint; the receiver will not
         insert a leg within 0.1 distance units but will return to the leg
         screen you were viewing.


       The destination has now been changed. The receiver has
       updated the bearing and distance for this leg and displays it on
       the screen. Press the DOWN ARROW. The following leg has
       also been changed and now starts from the waypoint you
       designated as the TO waypoint for the previous leg.




90                  Magellan GSC 100 Global Satellite Communicator
 Navigating (Activating) a Leg
  While navigating using the multi-leg route, one leg of the route is
  said to be active. This is the leg that is currently being used to
  provide navigational information. It is sometimes desirable to
  activate a different leg, thereby changing the destination that you
  are navigating towards.
     From any NAV or PLOT screen, press the MNU key. Use the
     UP/DOWN ARROWs to highlight ROUTE MENU and press
     ENTER. Highlight the route to be edited and press ENTER.
     Use the UP/DOWN ARROWs to highlight EDIT and press
     ENTER. Use the UP/DOWN ARROWs to view the leg to be
     activated. Press ENTER to access the EDIT LEG menu, select
     NAVIGATE and press ENTER. The last viewed NAV or
     PLOT screen will appear, displaying the new active leg.

        If a route, GOTO or MOB is already active, the leg you choose to
        navigate automatically replaces it as the active leg.

 Deleting a Route
  This operation permanently removes a route from the ROUTE
  MENU returning the route to the "EMPTY" status.
     From any NAV or PLOT screen, press the MNU key. Use the
     UP/DOWN ARROWs to highlight ROUTE MENU and press
     ENTER. Highlight the route to be cleared and press ENTER.
     Use the UP/DOWN ARROWs to highlight DELETE and
     press ENTER. You will be prompted to confirm the deletion
     of the route by either pressing ENTER or the softkey
     corresponding to YES. The route is now cleared from memory
     and you are brought back to the ROUTE MENU.




Magellan GSC 100 Global Satellite Communicator                       91
Creating an MOB (Man OverBoard) Route
     The MOB, or Man OverBoard, function causes the receiver to
     save the position that is current when the feature is accessed and
     creates a one-leg route back to that position.
       From the MAIN MENU, press the GPS softkey. Press the
       GOTO softkey. Use the UP/DOWN ARROWs to highlight
       MOB and press ENTER. The receiver has now accepted that
       position as the MOB designation and returns you to the last
       viewed NAV screen.

           If you have already saved an MOB position, the receiver will
           prompt you to replace the MOB position. Press the softkey
           corresponding to YES to accept the new MOB.


           The MOB position and MOB route information will be lost when
           the receiver is turned off.


Creating a Backtrack Route
     This creates a route using fixes in the Last Fix Buffer (up to 16 of
     the most recent last fixes) to create a route that "backtracks" the
     course you last took. This way you could leave point A, travel for
     some time, set a backtrack route and the receiver would guide you
     back to point A following the same course you just took.
       From the MAIN MENU, press the GPS softkey. Press the
       GOTO softkey, use the UP/DOWN ARROWs to highlight
       BCKTRK and press ENTER. A backtrack is created in the
       first available route.

Last Fix Buffer
     While you are taking position fixes your receiver can
     automatically save them. The receiver will store position fixes in
     the last fix buffer at a rate you defined in SETUP under LAST
     FIX INTERVAL.


92                  Magellan GSC 100 Global Satellite Communicator
 Viewing a LAST FIX
     From any NAV or PLOT screen, press the AUX softkey. Use
     the UP/DOWN ARROWs to highlight LAST FIXES and
     press ENTER. The LAST FIX screen that appears exactly
     duplicates the screen you have already seen when viewing a
     waypoint.
  Notice that the receiver has assigned a name that begins with a
  plus (+) and is followed by a two-digit number. This number will
  increase as the Last Fixes are being taken with the higher the
  number, the older the fix. The receiver will store a total of 16
  Last Fixes.
     Use the LEFT/RIGHT ARROWs to scroll through the other
     last fixes in the buffer.
 Viewing the LAST FIX Trip Summary Screen
  This screen informs you that the summary you are about to view
  will cover the trip you made from the time the selected last fix
  was recorded to your present position (POS) or a different last fix.
     From any NAV or PLOT screen,               GP
                                                  S
                                                      2
                                                          d                 1:54P

     press the softkey corresponding to               LAST FIX
                                             +LFX01
     AUX. Use the UP/DOWN
                                                   34 11.00                    N
     ARROWs to highlight LAST                    119 43.02                     W
     FIXES and press ENTER. Use the              900 FT
     LEFT/RIGHT ARROWs to select               01:54P02SEP97
     any Last Fix except +LFX01.              NAV             PLOT   GOTO   AUX

     Press the UP ARROW to view the
     TRIP SUMMARY screen. Use the               GP
                                                  S
                                                      2
                                                          d                 2:54P
     LEFT/RIGHT ARROWs to select              TRIP SUMMARY
     any of the other fixes present in the   FROM               +LFX03
                                             0 1 : 5 4 P 0 2 S E P 9 7
     last fix buffer that were taken after
     the one chosen as the "FROM"
                                             TO                 POS
     waypoint. After scrolling to the fix    0 3 : 1 8 P 0 2 S E P 9 7
     desired, press UP ARROW for the          NAV             PLOT   GOTO   AUX
     Trip Summary for that route.

Magellan GSC 100 Global Satellite Communicator                                93
            If you select +LFX01 as the FROM waypoint you will not be
            given the opportunity to change the "TO" waypoint since there
            have been no other fixes saved since +LFX01 was recorded. A
            message "SELECT OLDER STARTING FIX FOR TRIP"
            appears.


Setup Options

     Setup options allow you to customize your receiver to display
     information in the format that best suits your needs.

GPS Setup
Initializing the Receiver
     This option was discussed in more detail earlier, but, in general,
     INITIALIZE allows you to input the approximate coordinates,
     time and date for your present position if the unit has computed a
     position fix or if it has had its memory cleared. This function
     should also be used any time the unit is moved more than 300
     miles while turned OFF, to help the unit acquire a fix faster.
       To initialize your GSC 100 proceed                              10:26A
                                                     MAIN MENU
       from the MAIN MENU, using the
                                                     ORBCOMM SATS
       softkey options listed along the
                                                 0 8 : 11 P T O 0 8 : 1 6 P
       bottom of the screen, to the SETUP        09:01P TO 09:14P
       MENU by pressing the SETUP                   UNREAD MSGS 0
       softkey.                                     QUEUED MSGS 0
                                                 MSGS    GPS   SETUP   SATS



       Once in the SETUP MENU you                                      10:26A
                                                         SETUP
       will use the UP/DOWN ARROW
                                                 GENERAL SETUP
       to highlight GPS SETUP and press          GPS SETUP
       ENTER.                                    ORBCOMM SETUP




94                 Magellan GSC 100 Global Satellite Communicator
     The GPS SETUP MENU is now                 GP
                                                 S
                                                     2
                                                         d           10:28A

     displayed with the menu option             GPS SETUP
                                             INITIALIZE
     INITIALIZE highlighted. Press           COORD SYSTEM
     ENTER. Within the GPS SETUP             ELEV MODE
     MENU there is an additional page        V E L O C I T Y AV G
                                             SPEED UNITS
     of options that the user can access     DIST UNITS
     by using the UP/DOWN
     ARROWS to scroll.
                                                                 A

     You are now at the                                          L
                                                                 T   10:30A
                                                 INITIALIZE
     INITIALIZATION screen. All four
     arrow directions will be utilized as                     00 00.00N
                                                             000 00.00W
     depicted by the four way arrow
     icon at the top of the screen. Also,
     this screen becomes active in the
     ALT mode as the only entries to be
     made are numerical. Use the same
     procedure as was used earlier in the
     GPS Initialization section.
     After that has been completed, continue to the next section.
 Setting the Coordinate System
  The coordinate system you select will depend on the maps or
  charts that you are using with your receiver. The default
  coordinate system is LAT/LON, DEG/MIN.00.
     From the MAIN MENU, press the SETUP softkey. Using the
     UP/DOWN ARROWs, highlight GPS SETUP and press
     ENTER. Highlight COORD SYSTEM, using the UP/DOWN
     ARROWs, and press ENTER. Use the UP/DOWN
     ARROWs to highlight coordinate system desired and press
     ENTER.




Magellan GSC 100 Global Satellite Communicator                          95
          If you select LAT/LON, you will be asked to select one of three
          formats for displaying position coordinates: DEG/MIN.00, DEG/
          MIN.000 or DEG/MIN/SEC. If you choose one of the first two
          options, the display is in decimal format, while the third option is
          based on 60 seconds in a minute.


     Available Coordinate Systems:
              LAT/LON                   IRISH GRID
              UTM                       SWISS GRID
              OSGB                      SWEDISH GRID
Setting the Elevation Mode
     In addition to position, your receiver can compute your elevation
     when it is receiving signals from at least four satellites. This is
     referred to as "3D" Elevation Mode.
       From the MAIN MENU, press the SETUP softkey. Using the
       UP/DOWN ARROWs, highlight GPS SETUP and press
       ENTER. Highlight ELEV MODE, using the UP/DOWN
       ARROWs, and press ENTER. Using the UP/DOWN
       ARROWs, highlight the mode desired and press ENTER.
     When there are only three satellites in view, the receiver can only
     compute a two-dimensional fix. In this case the receiver will
     display the last computed elevation or the elevation that you
     manually entered in INITIALIZE. This elevation mode is
     referred to as "2D" (the default setting). You may select either
     elevation mode in this SETUP feature.
     If you select the 2D elevation mode you will be prompted to input
     the elevation. If you are unsure of the elevation you can press
     ENTER to accept the previously used elevation.
     If you select the 3D elevation mode, the receiver will calculate
     elevation whenever signals are being received from at least four
     satellites. When fewer satellites are being tracked, the receiver
     will default to 2D and display the 2D icon at the top of the screen.


96                  Magellan GSC 100 Global Satellite Communicator
 Setting Velocity Averaging
  As you are traveling with your unit on, you may notice
  fluctuations in the velocity displayed. Velocity is susceptible to
  Selective Availability and velocity averaging will minimize this
  effect by displaying an averaged speed measurement. You have
  three options to choose from: OFF (no averaging) would be used
  where you require rapid updates of velocity: 20 SECONDS
  would be selected where rapid updates of velocity are not
  essential, generally at fairly low velocities; or 60 SECONDS
  where immediate velocity information is relatively unimportant,
  such as a long journey at a constant speed. The default is OFF.
     To access this feature, press the SETUP softkey from MAIN
     MENU. Using the UP/DOWN ARROWs, highlight GPS
     SETUP and press ENTER. Highlight VELOCITY AVG, using
     the UP/DOWN ARROWs, and press ENTER. Highlight the
     setting desired and press ENTER.
 Setting Speed Units
  SPEED UNITS allows you to select the unit of measure for speed
  measurements. You may choose from KNOTS, MILES/HR or
  KM/HR. The default is KNOTS.
     Press the SETUP softkey from MAIN MENU. Using the UP/
     DOWN ARROWs, highlight GPS SETUP and press ENTER.
     Highlight SPEED UNITS, using the UP/DOWN ARROWs,
     and press ENTER. Highlight the setting desired and press
     ENTER.
 Setting Distance Units
  DIST UNITS (Distance Units) allows you to select the unit of
  measure that distances will be displayed in. You may choose
  from NM (nautical miles), ST MILES (statute miles), or KM
  (kilometers). The default setting is NM.




Magellan GSC 100 Global Satellite Communicator                    97
       To access this feature, press the SETUP softkey from MAIN
       MENU. Using the UP/DOWN ARROWs, highlight GPS
       SETUP and press ENTER. Highlight DIST UNITS, using the
       UP/DOWN ARROWs, and press ENTER. Highlight the
       setting desired and press ENTER.
Setting Elevation Units
     ELEV UNITS (Elevation Units) is the same as DIST UNITS but
     this time you will select the unit of measure that will be used to
     display your elevation in. You may choose from METERS or
     FEET. The default setting is FEET.
       To access this feature, press the SETUP softkey from MAIN
       MENU. Using the UP/DOWN ARROWs, highlight GPS
       SETUP and press ENTER. Highlight ELEV UNITS, using the
       UP/DOWN ARROWs, and press ENTER. Highlight the
       setting desired and press ENTER.
Setting North Reference
     This sets the north reference of the displays to TRUE or
     MAGNETIC. The default North reference is MAGNETIC.
       To access this feature, press the SETUP softkey from MAIN
       MENU. Using the UP/DOWN ARROWs, highlight GPS
       SETUP and press ENTER. Highlight NORTH REF, using the
       UP/DOWN ARROWs, and press ENTER. Highlight the
       setting desired and press ENTER.
Selecting Map Datum
     Depending upon which map or chart you are using you may need
     to change the Map Datum that the receiver will use. The datum
     required will be printed on the map or chart. The most common
     is WGS84, which is also the default Map Datum.




98                 Magellan GSC 100 Global Satellite Communicator
     To access this feature, press the SETUP softkey from MAIN
     MENU. Using the UP/DOWN ARROWs, highlight GPS
     SETUP and press ENTER. Highlight MAP DATUM, using the
     UP/DOWN ARROWs, and press ENTER. Highlight the
     setting desired and press ENTER.
 Selecting Waypoint Sort
  WPT SORT allows you to classify the waypoints stored in the
  user waypoint catalog in alphabetical order or according to their
  proximity to the present position with the closest listed first. You
  may choose from ALPHABETICAL, NEAREST or ICON. The
  default setting is ALPHABETICAL.
     To access this feature, press the SETUP softkey from MAIN
     MENU. Using the UP/DOWN ARROWs, highlight GPS
     SETUP and press ENTER. Highlight WPT SORT, using the
     UP/DOWN ARROWs, and press ENTER. Highlight the
     setting desired and press ENTER.
 Selecting the Last Fix Interval
  This function allows you to set the rate that positions are
  automatically saved to the last fix buffer. The default is 10
  minutes.
     To access this feature, press the SETUP softkey from MAIN
     MENU. Using the UP/DOWN ARROWs, highlight GPS
     SETUP and press ENTER. Highlight LFIX INTERVAL, using
     the UP/DOWN ARROWs, and press ENTER. Highlight the
     setting desired and press ENTER.
 Plot Setup
  PLOT SETUP allows you to adjust the track orientation and track
  history on the PLOT screen. For TRACK you may select OFF,
  0.1, 0.5, 1.0 or 5.0. The default track setting is 1.0. For
  ORIENTATION, you may select HEADING UP or NORTH UP.
  The default setting is HEADING UP.


Magellan GSC 100 Global Satellite Communicator                      99
         From the MAIN MENU, press the SETUP softkey. Using the
         UP/DOWN ARROWs, highlight GPS SETUP and press
         ENTER. Highlight PLOT SETUP, using the UP/DOWN
         ARROWs, and press ENTER. Use the UP/DOWN
         ARROWs to select the ORIENTATION desired and then use
         the LEFT/RIGHT ARROWs to select the TRACK setting
         desired. Press ENTER to accept your selections.

 General Setup
 Selecting Time Format
      Your Magellan receiver can display time in one of three formats:
      local 24-hour (military), local 12-hour (AM/PM), or UT
      (Universal Time or Zulu). The default Time Display is LOCAL
      AM/PM.
         To access this feature, press the SETUP softkey from MAIN
         MENU. Using the UP/DOWN ARROWs, highlight
         GENERAL SETUP and press ENTER. Highlight TIME
         FORMAT, using the UP/DOWN ARROWs, and press
         ENTER. Highlight the setting desired and press ENTER.

           If the receiver does not have a computed position fix the receiver
           displays a warning to alert you that an initial time has not been
           set to INITIALIZE. After inputting an initial time you may
           change the format that time is displayed in.


 Setting the Light Timer
      Since using the light in the unit uses up power at a quicker pace,
      this feature allows you to set the light timer to turn the units light
      off at a certain time to help conserve power. There are six
      settings for the light timer; OFF, 15 SECONDS, 30 SECONDS, 1
      MINUTE, 2 MINUTES and 3 MINUTES.




100                  Magellan GSC 100 Global Satellite Communicator
     To set the light timer, press the LIGHT key. From the MAIN
     MENU, press the SETUP softkey. Using the UP/DOWN
     ARROWs, highlight GENERAL SETUP and press ENTER.
     Highlight LIGHT TIMER, using the UP/DOWN ARROWs,
     and press ENTER. Using the UP/DOWN ARROWs,
     highlight the setting desired and press ENTER.
 Sampling
  Sampling causes the receiver to turn itself ON at user-specified
  intervals, compute a position fix, store the fix in the last fix buffer
  and then turn itself OFF. Sampling is also used to send/receive
  GlobalGrams at user-specified intervals and then turn itself OFF.
  The default setting is OFF.
     To access sampling, press the SETUP softkey from MAIN
     MENU. Using the UP/DOWN ARROWs, highlight
     GENERAL SETUP and press ENTER. Highlight
     SAMPLING, using the UP/DOWN ARROWs, and press
     ENTER. Using the UP/DOWN ARROWs, highlight OFF,
     GPS ONLY or GPS AND MSGS and press ENTER. If you
     choose GPS ONLY, or GPS AND MSGS, use the UP/DOWN
     ARROWs to highlight the setting desired and press ENTER.
  To use the sampling feature to compute position fixes only, you
  would choose the setting GPS ONLY. To use it to compute
  position fixes and to send/receive GlobalGrams, you would
  choose GPS AND MSGS.
  In order to use Sampling, the receiver's antenna must remain fully
  visible to the sky. If the antenna is blocked, so that the receiver
  cannot acquire sufficient satellites, the receiver will be unable to
  compute a position fix or send/receive GlobalGrams and the
  receiver will remain ON until the obstruction is removed.
  When Sampling is ON, a warning message appears on the
  POWER DOWN screen to remind you that you have Sampling
  ON. Sampling will continue until it is turned OFF or until the
  battery warning is displayed.


Magellan GSC 100 Global Satellite Communicator                       101
      When the unit is turned ON again, a message will appear
      requiring you to confirm whether you want SAMPLING ON or
      OFF. Select ON or OFF using the UP/DOWN ARROWs and
      press ENTER.
 Setting NMEA Port and Baud Rate
      NMEA is the communication STANDARD for electronic marine
      navigation equipment. Your receiver outputs position and
      navigation information in the NMEA 0183 format to support
      navigation aids such as autopilots. To use NMEA your receiver
      must be connected to the NMEA device with the Power/Data
      Cable and the device you are using must accept the proper 0183
      format. Your GPS receiver must be on and computing fixes
      before NMEA information will be output through the data port.
        To access this feature, press the SETUP softkey from MAIN
        MENU. Using the UP/DOWN ARROWs, highlight
        GENERAL SETUP and press ENTER. Highlight NMEA
        PORT, using the UP/DOWN ARROWs, and press ENTER.
        Highlight the setting desired and press ENTER. Using the
        UP/DOWN ARROWs, highlight baud rate desired and press
        ENTER.


            NMEA does not work while the unit is in ORBCOMM MODE.
            Therefore, if you are using NMEA to control an autopilot it is
            recommended that the GPS MODE be selected.


           Keep in mind that in order to support the NMEA device, your
           receiver must be operating continuously and Sampling should be
           disengaged. To prevent outages due to low batteries, external
           power is recommended.




102                  Magellan GSC 100 Global Satellite Communicator
 Selecting RS-232 Port and Baud Rate
  BAUD RATE allows you to select the appropriate baud rate for
  your external equipment. (Check the documentation of your
  external equipment.) You may choose from 9600, 19200, 57600
  or 115200. The default setting is 9600.
     To access this feature, press the SETUP softkey from MAIN
     MENU. Using the UP/DOWN ARROWs, highlight
     GENERAL SETUP and press ENTER. Highlight RS232
     PORT, using the UP/DOWN ARROWs, and press ENTER.
     Use the UP/DOWN ARROWs to highlight ON and press
     ENTER. Using the UP/DOWN ARROWs, highlight baud
     rate desired and press ENTER.
 Selecting Clear Menu
  The CLEAR MENU option allows you to clear selected portions
  of memory while keeping all other pertinent data intact.
     To clear the menu, press the SETUP softkey from MAIN
     MENU. Using the UP/DOWN ARROWs, highlight
     GENERAL SETUP and press ENTER. Highlight CLEAR
     MENU, using the UP/DOWN ARROWs, and press ENTER.
     Highlight MESSAGES, ADDRESSES, LAST FIXES,
     TRACK, WPTS/RTS or ALL and press ENTER. You are now
     given the chance to confirm your entry. If you wish to
     continue, press the YES softkey or ENTER. If you do not
     wish to CLEAR press the NO softkey.
 Contrast
  CONTRAST allows you to adjust the contrast level of the display
  to allow you to select the best contrast level for the particular
  lighting condition you are in. Following are the three ways to
  alter the contrast level of the display on the GSC 100:




Magellan GSC 100 Global Satellite Communicator                  103
      To set the contrast, press the SETUP softkey from MAIN
      MENU. Using the UP/DOWN ARROWs, highlight
      GENERAL SETUP and press ENTER. Highlight
      CONTRAST, using the UP/DOWN ARROWs, and press
      ENTER. Use the LEFT/RIGHT ARROWs to adjust the
      contrast and press ENTER.
      From any NAV or PLOT screen, press the MNU key. Using
      the UP/DOWN ARROWs, highlight CONTRAST and press
      ENTER. Use the LEFT/RIGHT ARROWs to adjust the
      contrast and press ENTER.
      From the MAIN MENU, press the MNU key. Using the UP/
      DOWN ARROWs, highlight CONTRAST and press ENTER.
      Use the LEFT/RIGHT ARROWs to adjust the contrast and
      press ENTER.




104             Magellan GSC 100 Global Satellite Communicator
 Additional Features

 Viewing ORBCOMM SAT STATUS Screen
  This screen displays the ORBCOMM satellites by their location,
  using azimuth and elevation data, and showing their signal
  strength using an energy bar located on the left side of the screen.
  The dot moving within the circles represents the satellite being
  tracked with your location designated by the dot in the center of
  the two circles.
     From the MAIN MENU, press the                                        OR
                                                                                  B            4:17P

     SATS softkey. You are now at the                ORBCOMM SATS
                                                                                                  7
                                                                                                  A
                                                                                                   Z    m
                                                                          N
     ORBCOMM SATS screen, showing                                                                 2
                                                                                                  4
                                                                                                        EL
                                                                                                        I
                                                                                                          D

     the location of the ORBCOMM
     satellite being utilized as well as its
     azimuth and elevation. On the left
     side of the screen is a signal                        1            2 CLOCK GPS
     strength bar showing that satellite's
     strength. The more the bar is filled,
     the better transmission you are
     getting. Also, below the satellite                         Satellite Being
     strength bar is both the closed                            Tracked         Satellite ID#
                                                 User Location
     envelope and mailbox with the icon
                                                                         OR
     in the up position icons. Next to                                        B               4:17P
                                                  ORBCOMM SATS
     these icons will be a number                                                              7A
                                                                                                  Z    m
                                                                         N
                                                                                               2
     showing how many unread                                                                    4
                                                                                                       EL
                                                                                                       I
                                                                                                         D


     GlobalGrams you have and how
     many GlobalGrams have been sent
     to the MAILBOX for transmission.
     As you receive and send                              1           2 CLOCK GPS

     GlobalGrams these numbers will
     change. When there is no                Satellite
                                             Strength Bar                                  Satellite Track
     ORBCOMM satellite in view, this                      Messages Messages
     screen lists the time of the next                    Received To Be Sent
     pass.

Magellan GSC 100 Global Satellite Communicator                                                         105
         There is an additional screen                                   OR
                                                                               B        4:20P

         accessed from the ORBCOMM                    ORBCOMM                  SATS
                                                      RISE         SET                 ID
         SATS screen. By pressing the               01:05P-01:15P                       1
         DOWN ARROW on your keypad,                     2 9m    A
                                                                   8 6m
                                                                     Z                9  A
                                                                                               Z              EL

         you are brought to the ORBCOMM             04:25P-04:40P                       2
         SATELLITE SCHEDULE screen,                     2 6m    A
                                                                   9 2m
                                                                     Z                7  A
                                                                                               Z              EL

         showing the schedule of the next                                CLOCK         GPS

         several satellite passes, including
         elevation, azimuth data and the     Azimuth at the   Azimuth at the Maximum elevation
         satellite id and elevation. Within beginning of      end of satellite during satellite pass
                                             satellite pass   pass
         this screen you can use the UP/
         DOWN ARROWs to scroll
         through the available schedule.

            Abrupt changes of greater than 10 minutes or 100 km cause the
            unit to recompute the ORBCOMM satellite schedule.


 Viewing GPS SAT STATUS Screen
      This screen displays the satellites by their signal strength and
      their position in the sky relative to your location. An asterisk (*)
      indicates that the unit is not locked on to that particular satellite.
      When lock is achieved the * will be replaced by the signal
      strength of the satellite. Signal strength will range from 0 to 9,
      with 9 representing better signal strength.
         From the MAIN MENU, press the                                   GP
                                                                           S
                                                                                   2
                                                                                       d                      2:57P

         SATS softkey, which brings you to                                 GPS SATS
                                                                                                               EPE
         the ORBCOMM SATS screen, and                                N
                                                                                   *2 *                       108 FT


         then press the GPS softkey. You                                                                 4
         will then be at the GPS SATS                                              * 9
         screen. The center dot on the bull's-                                             9         2
         eye is your present position. The                                                         ORB       CLOCK
         center ring is approximately 45
         above the horizon and the outer
         ring is the horizon.


106                      Magellan GSC 100 Global Satellite Communicator
 Viewing the Odometer
  The Odometer feature displays the ODOMETER screen, which
  keeps track of total distance traveled as well as trip distance,
  similar to the odometer in an automobile.
     To view the odometer, press the            GP
                                                  S
                                                      2
                                                          d                 2:42P

     GPS softkey from the MAIN                  ODOMETER
                                                      ODOMETER
     MENU, and then press the AUX
                                                 0 0 0 0 0 0n
                                                            m
     softkey. Use the UP/DOWN
                                                TRIP ODOMETER
     ARROWs to highlight
     ODOMETER and press ENTER.                            0 0 0 0n
                                                                 m


     You are now at the ODOMETER              NAV             PLOT   GOTO   AUX

     screen.

 Resetting the Odometer and/or Trip Odometer
     From the ODOMETER screen,                  GP
                                                  S
                                                      2
                                                          d                 2:42P

     press MNU. A pop-up menu will              ODOMETER
                                               R ES E T TR IP
                                                  ODOMETER
     appear with the options to RESET          R0ES0E0T0OD
                                                         0OM0nM
     TRIP, RESET ODOM or SYS                   S YS MOD E
                                                TRIP ODOMETER
     MODE. Use the UP/DOWN
     ARROWs to highlight which                        0 0 0 0n
                                                             m


     odometer you wish to reset and           NAV         PLOT       GOTO   AUX

     press ENTER. This will reset the
     odometer of choice and bring you
     back to the ODOMETER screen.

 Viewing the Clock
  The Clock option will display the current date and time in the
  time format selected during setup.
     From the MAIN MENU, press the SATS softkey and then press
     the CLOCK softkey. You are now at the CLOCK screen.




Magellan GSC 100 Global Satellite Communicator                               107
 Viewing the SUN/MOON Screen
      This screen will display the time of sunrise and sunset for the
      chosen waypoint. It also graphically displays the lunar cycle of
      the moon.
        After accessing the GPS screens, by pressing the GPS softkey
        from the MAIN MENU, press the AUX softkey. Using the UP/
        DOWN ARROWs, highlight WAYPOINTS and press
        ENTER. Highlight the waypoint in the list which you wish to
        view sunrise information and press ENTER. Press the MNU
        key and use the UP/DOWN ARROWs to highlight SUNRISE
        and press ENTER.
                                                    GP                     A

        The first step in viewing the solar           S
                                                          2
                                                              d            L
                                                                           T    10:52A
                                                                     DOCK
        and lunar information is to enter the
                                                              27AUG97
        date for which you want the              SUN
        information. Use the UP/DOWN             SUN
        and LEFT/RIGHT ARROWs to                 MOON
        set the date and press ENTER.
                                                  NAV             PLOT   GOTO   AUX



      The receiver will compute the sunrise, sunset and lunar cycle for
      the waypoint chosen on the date you entered.

 GPS Simulator
      The simulator mode causes the receiver to create a fictitious route
      from your location to two newly created waypoints. You will find
      the Simulator very handy when you want to review or practice
      using your receiver at home. In the simulate mode you can watch
      the receiver simulate movement and observe how the different
      navigational screens respond.
        To activate the GPS Simulator press the SETUP softkey, from
        the MAIN MENU, and, using the UP/DOWN ARROWs,
        highlight GENERAL SETUP and press ENTER. Within the
        GENERAL SETUP MENU use the UP/DOWN ARROWs to
        highlight GPS SIMULATOR and press ENTER. You will


108                 Magellan GSC 100 Global Satellite Communicator
     then be prompted to press ENTER to continue. This will
     return you to the GENERAL SETUP MENU. To view the NAV
     screens showing the simulation, access the MAIN MENU and
     press the GPS softkey.

       Using the simulator changes the current position. When the
       simulator is turned off, the unit will need to compute a new fix.


 ORBCOMM Demo
  This feature allows you to run a demonstration of the capabilities
  associated with the messaging functions available. As with the
  GPS simulator, this option simulates the functionality of
  ORBCOMM operations and allows you to see what an incoming
  and outgoing GlobalGram will look like in the units MESSAGE
  LIST. Using this feature will aid you in sending and receiving
  messages using your GSC 100.
     From the MAIN MENU, press the SETUP softkey. Using the
     UP/DOWN ARROWs, highlight GENERAL SETUP and
     press ENTER. From the GENERAL SETUP MENU highlight
     ORBCOMM DEMO, using the UP/DOWN ARROWs, and
     press ENTER. You will then press the ENTER key again to
     confirm your desire to run the ORBCOMM DEMO.

 Erasing Last Fixes
  ERASE LFIX will erase all of the waypoints in your Last Fix
  Buffer. By doing this you will free up those fixes for future use.
     From the MAIN MENU, press the SETUP softkey. Using the
     UP/DOWN ARROWs, highlight GENERAL SETUP and
     press ENTER. From the GENERAL SETUP MENU highlight
     CLEAR MENU, using the UP/DOWN ARROWs, and press
     ENTER. Highlight LAST FIXES and press ENTER. You
     will then be given an opportunity to confirm this action so
     press either the ENTER key or the YES softkey. If you
     change your mind then press the NO softkey or any other key
     to exit without erasing.

Magellan GSC 100 Global Satellite Communicator                             109
 Accessing the ABOUT Screen
      At various times you will need to know the software version
      number your GSC 100 is using as well as the serial number for
      your unit. Use the following steps to access this information in
      the ABOUT screen.
        From the MAIN MENU, press the SETUP softkey. Use the
        UP/DOWN ARROWs to highlight GENERAL SETUP and
        press ENTER. Highlight ABOUT, using the UP/DOWN
        ARROWs, and press ENTER to access the ABOUT screen.

 Erasing Track from the Plotter Screen
      As you use your receiver more, you may soon notice the PLOT
      screen becoming cluttered with the graphic display of your past
      movement (track). You can erase the track display with the
      CLEAR TRACK option.
        From the MAIN MENU, press the SETUP softkey. Use the
        UP/DOWN ARROWs to highlight GENERAL SETUP and
        press ENTER. Highlight CLEAR MENU and press ENTER.
        Using the UP/DOWN ARROWs, highlight TRACK and press
        ENTER. You will then be asked to either press ENTER, or
        the YES softkey, to confirm that you want to erase the track
        history. If you change your mind, press the NO softkey or any
        other function key to leave the track unchanged.

 Erase All Waypoints from Waypoint List
      CLEAR WAYPOINTS will erase all of the waypoints in your
      waypoint list. If routes currently exist, clearing waypoints
      requires that all routes be cleared and a message will be
      displayed. See Clearing Routes.
        From the MAIN MENU, press the SETUP softkey. Using the
        UP/DOWN ARROWs to highlight GENERAL SETUP and
        press ENTER. Highlight CLEAR MENU and press ENTER.
        Highlight WPTS/RTS, using the UP/DOWN ARROWs, and


110                 Magellan GSC 100 Global Satellite Communicator
     press ENTER. You will be instructed to press either the
     ENTER key, or the YES softkey, to erase the waypoints. If
     you change your mind, press the NO softkey or any other
     function key to leave the waypoints intact.

 Clearing Receiver Memory
  Clear Memory will erase all of your receiver's memory including
  resetting all of the Setup features to their default values.
     To clear memory, access the MAIN MENU and press the
     SETUP softkey. Use the UP/DOWN ARROWs to highlight
     GENERAL SETUP and press ENTER. Highlight CLEAR
     MENU, using the UP/DOWN ARROWs, and press ENTER.
     Use the UP/DOWN ARROWs to highlight ALL and press
     ENTER. Either press the softkey corresponding to YES or
     ENTER to confirm the CLEAR MENU command. If you
     change your mind press the NO softkey or any function key to
     escape.

 Performing a Hardware Reset
  If your GSC 100 unit locks up, will not respond to any key
  presses, you may need to perform a hardware reset. A hardware
  reset clears the units memory and resets all of the setup
  parameters to their default values.

       When conducting a hardware reset, all data in the unit will be lost
       with the exception of your speed dial addresses which are kept on
       file at the GCC you designated. This includes all addresses and
       messages stored in the unit.

     To perform a hardware reset, simultaneously press the CAPS,
     ALT and POWER keys.




Magellan GSC 100 Global Satellite Communicator                          111
ICONS

      The top row of the display has been reserved for displaying icons
      that assist you in determining the operating status of the GSC
      100.
              Arrow Key. Provides a visual indication as to which arrow
              keys are active for the displayed screen. There are different
              combinations of keys, as shown.
              Battery Charging. Alerts the user that the receiver is
              connected to external power and the battery is charging.
              Battery Warning. The battery is low and needs to be re-
              charged or replaced.
          !   Poor GQ Alert. The geometric quality (GQ) of the satellite
              is poor. Try to move away from any large obstructions that
              may be blocking reception of satellite signals.
      2
          d   2D. Displayed when the unit is calculating a two-
              dimensional position fix using three satellites (e.g. latitude
              and longitude).
      3
          d   3D. Displayed when the unit is calculating a three-
              dimensional position fix using four satellites (e.g. latitude,
              longitude and elevation).
      D       Differential. Indicates that the receiver is utilizing DGPS to
              compute position fixes. Requires an additional Differential
              Beacon receiver to utilize DGPS.
              Light. Displayed when the LCD backlight has been turned
              on with the LIGHT key. The backlight will cause the
              batteries to deplete much quicker and should be used only
              when needed.
              Old Data. The receiver has not updated position fixes for
              more than 15 seconds.


112                     Magellan GSC 100 Global Satellite Communicator
   C
   A
   P
       CAPS. Appears when the keypad is active and capital
       letters are being used.
   A
   L
   T
       ALT . Appears when the keypad is active and the ALT
       function is being used. This signifies that the alternate
       character mode is active and the characters listed in the
       upper right corner of the alphanumeric keys are now being
       utilized.
  S    Simulator. Indicates that the receiver is in GPS simulation
       mode. The simulator will stay active until the unit is turned
       off.
       Envelope. Appears in the status bar, along the top of the
       screen, when you have unread messages in the MESSAGE
       LIST. This icon is also shown next to the actual messages in
       the MESSAGE LIST alerting you that this message is unread.
       Open Envelope. This icon appears next to messages that
       you have already opened and read.
       Satellite. Appears in the status bar when ORBCOMM
       satellites are in view. It appears during the times that the
       satellites are visible, as listed on the ORBCOMM satellite
       schedule.
       Double Arrow. When you are outdoors transmitting to an
       ORBCOMM satellite, you will see this icon appear in the
       status bar. It alerts you that the unit is in communication
       with a satellite and your available message option is
       STANDARD.
       Broken Double Arrow. Appears in the status bar when your
       unit is transmitting to an ORBCOMM satellite but that
       satellite is not transmitting to a Ground Earth Station. It
       alerts you that your only available message option is STORE
       & FWD.
       Down Arrow. Displayed while the unit is "listening" to an
       ORBCOMM satellite but not yet transmitting.



Magellan GSC 100 Global Satellite Communicator                    113
           Broken Down Arrow. Displayed while the unit is
           "listening" to an ORBCOMM satellite, but not transmitting,
           and the only available GlobalGram type is STORE & FWD.
           Envelope and Check. Appears after you execute the check
           message function and there are unread messages in the unit.
           Check. Appears after you have executed the check
           messages function. It will disappear after the unit has
           checked for messages.
           Mailbox with Flag Up. Appears when there are messages
           present in the mailbox to be sent at the next satellite pass.
           The flag on the side of the mailbox is in the UP position
           alerting you that mail is present.
           Mailbox with Flag Down. Appears next to e-mail messages
           that have been sent.
           Page. Represents globalgrams that have been saved but
           have not been sent.
  OR       ORBCOMM Mode. Displayed when the unit is operating
       B
           in the ORBCOMM mode.
  GP
    S      GPS Mode. Displayed when the unit is operating in the
           GPS mode.




114                 Magellan GSC 100 Global Satellite Communicator
Warnings and Other Messages

  Following are various screens that will be displayed alerting you
  to the operating condition of your GSC 100.


  You have turned the unit ON, after            ATTENTION!
  resetting it or after just purchasing it,   GPS UNINITIALIZED
  and the GPS mode has been
                                              PRESS ENTER TO
  uninitialized.
                                               INITIALIZE OR
  Press the ENTER key and enter your            ESCAPE TO
  coordinates. Refer to the section on           CONTINUE
  GPS Initialization. Without
  initializing the unit will not be able to
  receive accurate positioning data used
  both in Navigation and ORBCOMM
  Satellite Scheduling.

                                                GP
                                                                     1:26P
  You have attempted to Save your                 S


                                                      SAVE POS
  position, using a waypoint identifier,              INVALID
  but haven't assigned a name.                       WAYPOINT
  Press ENTER, assign a symbol and                      NAME
                                                    PRESS ENTER
  enter a name for that waypoint and
                                                    TO CONTINUE
  press ENTER.                                NAV      PLOT   GOTO   AUX



                                                GP
                                                                     1:26P
  You have attempted to assign a                  S


                                                    SAVE POS
  waypoint name that has already been            DUPLICATE
  used. Every waypoint must have a                WAYPOINT
  unique name.                                      NAME
  Press ENTER and assign a different             PRESS ENTER
                                                 TO CONTINUE
  name to the waypoint.                       NAV      PLOT   GOTO   AUX




Magellan GSC 100 Global Satellite Communicator                         115
      You have attempted to view the Last           GP
                                                      S                  1:36P

      Fix List without having any fixes in              LAST FIX
      the Last Fix Buffer.                                NO FIXES
      Press the NAV softkey and position                   SAVED
      the receiver to collect satellite signals
      to compute a position fix. The
                                                  NAV      PLOT   GOTO   AUX
      receiver will create a last fix after a
      position fix is computed and will
      continue to create a last fix every 10
      minutes thereafter.


      You have attempted to set a GOTO              GP
                                                      S                  1:39P

      Backtrack without a sufficient number               WARNING
      of last fixes to create a Backtrack.           MORE FIXES
      Position the receiver to collect                    NEEDED
      satellite signals to compute fixes. The      TO CONTINUE
      receiver will create a last fix after a
                                                  NAV      PLOT   GOTO   AUX
      position fix is computed and will
      continue to create a last fix every 10
      minutes thereafter.


      You have attempted to set a route             GP
                                                      S                  1:26P

      without having saved any waypoints.           ATTENTION

      Enter one or more waypoints before              ENTER
      attempting to set a route.                    WAYPOINT
                                                   TO CONTINUE

                                                  NAV      PLOT   GOTO   AUX




116                  Magellan GSC 100 Global Satellite Communicator
  You have tried to set a GOTO or            GP
                                               S                 4:26P

  Backtrack route without enough            ATTENTION!
  empty spaces in the waypoint list to         CLEAR
  create the temporary waypoints that        WAYPOINT
  GOTO and Backtracks require.              TO CONTINUE

  Access the WAYPOINT MENU, by
                                           NAV     PLOT   GOTO   AUX
  pressing the AUX softkey from any
  GPS screen, select waypoints you no
  longer need and clear them from
  memory. If you were trying to set a
  GOTO route, you will need to clear
  only one waypoint, for a Backtrack,
  you may have to clear several
  waypoints to create enough space for
  the Backtrack temporary waypoints.


  You have pressed the GOTO softkey         GP
                                              S                  1:39P

  before the unit has been initialized.          WARNING

  Initialize the receiver to continue.      POSITION FIX
                                                   NEEDED
                                            TO CONTINUE



  You have attempted to send a message       GP
                                               S                 4:44P

  without entering any recipients in the     ATTENTION!
  TO screen.                               MESSAGE HAS NO
                                           RECIPIENTS AND
  Press the YES softkey, then the TO       CANNOT BE SENT
  softkey. Enter the recipients of this
  message and then press the SEND          ADD RECIPIENTS?
                                                   YES     NO
  softkey.




Magellan GSC 100 Global Satellite Communicator                    117
      You have attempted to exit a message        GP
                                                    S                        5:34P

      without saving it.                          ATTENTION!
                                               MESSAGE NOT SAVED
      Press the YES softkey to save the
      message to the MESSAGE LIST, or
      press the NO softkey to exit without      SAVED MESSAGE
      saving.                                   BEFORE EXITING?
                                                               YES    NO


                                                                      C

      You are attempting to create a STORE           OR
                                                          B
                                                                      A
                                                                      P     1:32P

      & FWD message.                           TO:
                                                            PRESS ADBK
      Since you can only send these types of                 TO SELECT
      messages to speed dial addresses, you                  RECIPIENT
      must access the ADDRESS BOOK and
      choose the speed dial address desired.
                                               TEXT           ADBK   SAVE   SEND




      You have accessed the messaging             GP
                                                    S                        2:12P

      functions without having any               NO MESSAGES
      messages, inbound or outbound.                  AVAILABLE
      Press the NEW softkey to create a            PRESS NEW
      message.                                        TO CREATE
                                                NAV           PLOT   GOTO   AUX



                                                  OR
      You have changed the PREFERRED                    B                   10:34A

      GCC ID designation.                      PREFERRED GCC
                                                  PRESS ENT TO
      Press ENTER to accept the new ID              ACTIVATE
                                                     GCC ID
      and your unit will reboot. Pressing         SYSTEM WILL
      ESC will cancel the action and return          REBOOT
      you to the previously viewed screen.
                                                 ESC TO CANCEL




118                 Magellan GSC 100 Global Satellite Communicator
Troubleshooting

  The following is a brief guide to some of the problems that might
  be encountered while using a GPS satellite receiver or
  ORBCOMM receiver/transceiver and what you can do to correct
  them.
  GPS
  Receiver will not turn ON
     1   Check to see if the battery pack is installed correctly.
     2   Replace the battery pack.
     3   If using external power, make sure the connector is fastened
         tightly.
  Receiver will not compute a position fix or is losing lock
     1   Make sure that you have a clear and unobstructed view of
         the sky with the unit held away from your body and that
         your hand or other items are not blocking the antenna.
     2   Have you moved over 300 miles with the receiver off since
         your last position fix? If so, the receiver may need to be
         reinitialized.
     3   Check Sat Status to see where the satellites are and if the
         receiver is acquiring data.
     4   Check date and time on the POSITION screen.
  Elevation jumps up and down
     1   Errors induced by the Department of Defense called
         Selective Availability (SA) can cause the elevation values to
         fluctuate.
  Old Data Icon is displayed and stays ON
     1   Make sure that you have a clear and unobstructed view of
         the sky with the unit held away from your body and that
         your hand or other items are not blocking the antenna.



Magellan GSC 100 Global Satellite Communicator                      119
        2   Check Sat Status to see where the satellites are and if the
            receiver is acquiring data.
      Battery life seems shorter than it should be
        1   Make sure that you are using the Magellan NiCad battery
            pack that was shipped with the unit.
        2   Shorter life span of the batteries can be due to excessive use
            of the backlight. Turn the backlight off when not needed.
      Position coordinates on your receiver do not match the location
      on your map
        1   Make sure that your receiver is set up to use the same datum
            as your map. The map datum is generally shown in the map
            legend. See Setting the Map Datum in the Setup Options
            section of this manual for instructions on selecting the map
            datum in your receiver.


      ORBCOMM
      The unit will not acquire any ORBCOMM satellites even
      though the unit shows they're in view
        1   Make sure that you have a clear and unobstructed view of
            the sky with the unit held away from your body and the
            antenna fully extended.
        2   Make sure that the unit is operating in either the AUTO
            mode or the ORBCOMM mode.
        3   Make sure that the unit has calculated a position fix and that
            the local time is displayed correctly. If the unit has been
            initialized with the wrong local time offset, then the unit will
            not reflect the correct ORBCOMM satellite schedule which
            will prompt the unit to search for satellites at the wrong
            times.
        4   If none of the above suggestions clear the problem, put the
            unit in ORBCOMM mode to make sure that it operates all of
            the messaging functions first.



120                   Magellan GSC 100 Global Satellite Communicator
  The GlobalGram I sent did not get delivered to the specified
  recipient
     1   Make sure that you are sending the correct type of message.
         If you see the double arrow icon at the top of the screen then
         you send a STANDARD message but if you see a broken
         double arrow icon your message should be a STORE &
         FWD.
     2   Make sure that the address you are sending your message to
         is the correct address for the intended recipient.
     3   It may take longer to deliver your GlobalGram if there is a
         lot of system traffic slowing down the network.
  When entering data in the SUBJ or TEXT fields, the cursor
  stops and won't allow any more entries
     1   Keep in mind the limit on the number of recipients for each
         message as well as the limit on characters you can enter in
         the SUBJ and TEXT fields. For a STANDARD message
         you can have seven (7) recipients, primary and carbon copy
         combined, a 229 character limit for the SUBJECT field and
         a 2000 character limit for the TEXT field. A STORE &
         FWD message has one recipient, has to be a speed dial
         address, with no SUBJECT and a 229 character limit in the
         TEXT field.
     2   Make sure that you have typed all your information in the
         correct fields. Sometimes users start typing information in
         the wrong field without noticing the softkey prompts for
         each field.
  The message I created was sent to the MAILBOX when I just
  wanted to SAVE it for editing at a later time
     1   Make sure that the message was SAVED and not SENT
         when you were done with it. To SAVE a message for later
         editing, press the SAVE softkey when complete. To SEND
         the message to the MAILBOX for transmission, press the
         SEND softkey when complete.



Magellan GSC 100 Global Satellite Communicator                      121
      Not all of the messages that I had queued were sent
        1    The number of globalgrams you can send per ORBCOMM
             satellite pass may vary. Inbound messages are received
             before your outgoing GlobalGrams can be sent, so if you
             have incoming messages there is a possibility that some of
             your outgoing messages might not get transmitted during
             this satellite pass. The angle of elevation of the
             ORBCOMM satellite could create a shorter pass, limiting
             the number of GlobalGrams transmitted. If there are objects
             obstructing the view of the sky, your messages might not get
             transmitted. Make sure your GSC 100 has a clear view of
             the sky. If the ORBCOMM network is busy handling a lot
             of messages then there could be a chance that your message
             doesn't get transmitted during the current pass.
        2    When your unit is checking for messages, it may take longer
             to send messages that you have already queued. If there are
             queued messages to be sent, the number can vary.
         3   Make sure to check the icon next to the queued message. If
             the flag on the mailbox is in the down position, the message
             was sent. If the flag is in the up position, the message has
             not been sent.
      None of the messages that I had queued were transmitted to the
      ORBCOMM satellite
        1    Make sure the unit is operating in either the AUTO or
             ORBCOMM mode. If the unit is operating in the GPS
             mode, then the receiver is not listening for ORBCOMM
             satellites.
        2    Make sure that your unit has a clear view of the sky. If there
             are obstructions blocking the view of the sky your unit may
             not transmit to ORBCOMM satellites.
         3   If your position coordinates are inaccurate, off by more than
             300 miles, then the satellite pass schedule may be incorrect.
         4   If the time is incorrect, by more than 15 minutes, than the
             satellite pass schedule may be incorrect.

122                   Magellan GSC 100 Global Satellite Communicator
     5   If this problem persists contact customer service.

 Contacting Customer Service

  The previous list should allow you to solve most of the operating
  problems you are likely to encounter, if the receiver still appears
  to be operating improperly there is one last resort. Try clearing
  the receiver's memory in the CLEAR MENU and reinitializing
  your receiver. Be cautious before doing this as this will clear all
  the waypoints, routes, addresses and messages that you have
  input into the receiver.
  If you are unable to solve your operation problems, please call
  Magellan's Customer Service at (800) 707-9971. Representatives
  are available Monday through Friday, from 7 A.M. to 5 P.M.,
  U.S.A. Pacific Standard Time. Faxes can be sent to Customer
  Service at (909) 394-7050. You can e-mail Magellan Technical
  Support at: wireless@mgln.com
  To contact ORBCOMM Customer Service you can call (800)
  ORBCOMM (672-2666). To contact ORBCOMM via e-mail use
  the following internet address:
  customer_service@orbcomm.com.
  If necessary, you can also return your unit to Magellan for repair.
  (Please call for assistance first.) You must notify us before
  shipping the unit by Parcel Post or UPS, and include with the unit
  a description of the problem and your name and address. If your
  return shipping address is different, please include it.
  It is necessary to return the enclosed registration card in order to
  activate the warranty.
  With all correspondence, please be sure to state the model of the
  receiver you have and, if calling, please be sure to have your unit
  with you.
  Packages should be sent to the following address:




Magellan GSC 100 Global Satellite Communicator                      123
      Magellan Systems Corporation
      960 Overland Court
      San Dimas, CA 91773
      Attn.: Warranty/Repair




124   Magellan GSC 100 Global Satellite Communicator
NMEA Data Messages

  Data Transfer
  Your GPS receiver can be set to output GPS data in the NMEA
  0183 format to interface with other marine devices.
  To output NMEA data the dataport must be turned on by selecting
  an output message format (0183A, 0183B, or 0183C) from the
  NMEA Setup function.
  NMEA Data Messages. NMEA data is output at 4800 baud, 8,
  N, 1, checksum off. These settings are acceptable to most
  equipment and software applications.
  There are several NMEA output message sets, each with a
  slightly different application. Check the documentation for your
  external equipment to select the appropriate message set.
  SET OUTPUT/USAGE
  0183A        BWC, APA, GLL, VTG
               Remote displays, version 1.x marine autopilots
  0183B        RMC, RMB
               NMEA-recommended navigation data for remote
               map, etc.
  0183C        APB, GGA, BWC, GLL, VTG
               Version 2.0 marine autopilot data and satellite data
  NMEA Message Definitions
   APA         Autopilot cross track error, direction to steer, status
               of GPS, route status, destination landmark name,
               and bearing from origin to destination (old format).




Magellan GSC 100 Global Satellite Communicator                     125
      APB       Revised autopilot message contains all of the above
                plus: heading to steer toward destination, bearing
                from the present position to the destination
                (magnetic or true).
      BWC       Range and bearing to a landmark
      GGA       GPS position, time, fix quality, number of satellites
                used, HDOP (Horizontal Dilution of Precision),
                differential reference information, and age.
      GLL       GPS-derived latitude, longitude, and time of fix.
      RMB       Data status, cross track error, direction to steer,
                origin, destination landmark, landmark location,
                bearing to destination, and velocity toward the
                destination.
      RMC       Time, latitude, longitude, speed over ground, course
                over ground, and date.
      VTG       Track (magnetic and true) and groundspeed (knots
                and KPH).
      OUTPUT DATA FORMAT
      APA Autopilot Format A
    1 2 3    4 5 6 7 8    9 10
APA,A,A,X.XX,L,N,A,A,XXX.,M,CCC
         1     OR'ed Blink and SNR         (A = valid, V =
               invalid)
         2     Cycle Lock     (A = valid, V = invalid)
         3-5   Cross Track, Sense (L = steer left, R =
               steer Right), N.Mi. Units
         6-7   Arrival Circle, Arrival Perpendicular
               (crossing of the line which is
               perpendicular to the course line and
               which passes through the destination
               landmark.



126              Magellan GSC 100 Global Satellite Communicator
       8-9     Bearing dest. LMK. from origin LMK.,
               Magnetic
       10      Dest LMK. identifier
  APB Autopilot Sentence "B"
    1 2 3   4 5 6 7 8   9 10    11 12 13 14
APB,A,A,x.x,a,N,A,A,x.x,a,c--c,x.x,a,x.x,a*hh
       1        Status: V = Loran-C Blink or SNR
                warning
                        A = general warning flag for
                other
                            navigation systems when a
                            reliable fix is not
                available.
       2        Status: V = Loran-C cycle lock warning
                flag
                        A = OK or not used
       3        Magnitude of XTE
       4        Direction to steer (L, R)
       5        XTE units, nautical miles
       6        Status:   A = arrival circle entered
       7        Status: A = perpendicular passed at
                landmark
       8-9      Bearing origin to destination, M/T
       10       Destination landmark ID
       11-12    Bearing, present position to
                destination, Magnetic or True
       13-14    Heading to steer to destination
                landmark, Magnetic or True




Magellan GSC 100 Global Satellite Communicator         127
      BWC To Selected Landmark, Great Circle
    1      2       3 4        5 6    7 8    9 10   11 12
BWC,XXXXXX,XXXX.XX,N,XXXXX.XX,W,XXX.,T,XXX.,M,XXX.X,N,CCCC
         1       UTC of Bearing
         2-3     Lat, N or S of landmark
         4-5     Long, E or W of landmark
         6-7     Bearing, True
         8-9     Bearing, Magnetic
         10-11   Distance, naut. miles
         12      Landmark identifier
      GGA Global Positioning System Fix Data
    1         2      3 4         5 6 7 8    9 1011
GGA,hhmmss.ss,111.11,a,yyyyy.yy,a,x,xx,x.x,x.x,M,x.x,
        1213 14
        M,x.x,xxxx*hh
         1       UTC of Position
         2-3     Latitude  N/S
         4-5     Longitude - E/W
         6       GPS   Quality Indicator
                   0   = fix not available or invalid
                   1   = GPS Fix
                   2   = Differential GPS Fix
         7       Number of satellites in use
         8       Horizontal dilution of precision
         9       Antenna altitude above/below mean sea
                 level
         10      Units of antenna altitude
         11      Geoidal separation  difference
                 between the WGS-84 earth ellipsoid and


128              Magellan GSC 100 Global Satellite Communicator
                   mean sea level (geoid), "-" = mean sea
                   level below ellipsoid
       12          Units of geoidal separation, meters.
       13          Age of Differntial GPS data  Time in
                   seconds since last SC104 Type 1 or 9
                   update, null field when DGPS is not
                   used
       14          Differential reference station ID,
                   0000-1023
   GLL Geographic Position -- Latitude/Longitude
    1       2 3        4 5         6
GLL,1111.11,a,yyyyy.yy,a,hhmmss.ss,A*hh
       1-2         Latitude, N/S
       2-3         Longitude, E/W
       4           UTC of position
       6           Status       A = Data valid
   RMB Generic Navigation Information (immediately
   follows RMC)
    1 2      3 4     5      6       7 8          9 10   11   12
RMB,A,X.XX,L,CCCC,CCCC,SSS.SS,N,XXXXX.XX,W,XXX.X,XXX.,XX.X,
     13 14
     A *XX
       1           Status       (A = valid,   V = invalid)
       2-3         XTE, naut. miles and direction to
                   steer (L or R) [If XTE exceeds 9.99
                   NM, display 9.99 in field 2.]
       4           Origin landmark ID
       5           Destination landmark ID
       6-7         Destination Landmark Latitude (N or S)



Magellan GSC 100 Global Satellite Communicator                    129
         8-9    Destination Landmark Longitude (E or
                W)
         10     Range naut. miles, present fix to
                destination landmark Great Circle.
                [If range exceeds 999.9 nm, display
                999.9.]
         11     Bearing, True, Great Circle, Present
                fix to dest. landmark
         12     Closing velocity to destination, knots
         13     Arrival (OR'ed arrival circle and
                crossing of line which is
                perpendicular to the course line and
                which passes through the destination
                landmark.)
         14     CHECKSUM (Mandatory in this
                sentence.)
      RMC Transit Specific (to be followed by RMB)
    1      2 3       4 5       6 7     8    9        10
12
RMC,XXXXXX,A,XXXX.XX,N,XXXXX.XX,W,XX.X,XXX.,XXXXXX,XX.,E
*XX
         1      Time, UTC
         2      Status    (A = valid,    V = invalid)
         3-4    Latitude at UTC time, N or S
         5-6    Longitude at UTC time, E or W
         7      Speed over ground, knots
         8      COG (track), degrees
         9      Date   (DDMMYY)
         10     Variation, degrees
         11     Variation, sense (E or W)
         12     CHECKSUM    (Mandatory in this sentence)


130              Magellan GSC 100 Global Satellite Communicator
  VTG Actual Track and Ground Speed (SOG)
                    1    2 3    4 5    6 7    8
                VTG,XXX.,T,XXX.,M,XX.X,N,XX.X,K
       1-2     Track degrees, True
       3-4     Track degrees, Magnetic
       5-6     Speed, knots
       7-8     Speed, kilometers/hour
  The formats listed are NMEA formats and Magellan receivers
  may not output all of the information listed for a particular
  format.
  A complete copy of the NMEA specifications can be obtained
  from:
        NMEA
        P.O. Box 3435
        New Bern, NC 28564-3435
        (919) 638-2626




Magellan GSC 100 Global Satellite Communicator                    131
Available Datums
Datum   Full Name                     Datum   Full Name
WGS84   World Geodetic System         IRELA   Ireland 1965
NAD27   North American 1927           KAUAI   Kauai
NAD83   North American 1983           KERTA   Kertau 1948
ADIND   Adinda                        KKJ     KKJ (Finland)
ALASK   Alaska                        LIBER   Liberia 1964
ARC50   Arc 1950                      LUZON   Luzon
ARC60   Arc 1960                      MASSA   Massawa
ASTRO   Camp Area Astro               MAUI    Maui
AUS66   Australian Geodetic 1966      MERCH   Merchich
AUS84   Australian Geodetic 1984      MINNA   Minna
BOGOT   Bogota Observatory            MONTJ
BUKIT   Bukit Rimpah                  NAHRW   Nahrwan, Saudi Arabia
CAMPO   Campo Inchauspe               OAHU    Oahu
CANAD   Canada                        OEGYP   Old Egyptian
CAPE    Cape                          OHAWA   Old Hawaiin
CARTH   Carthage                      OMAN    Oman
CENAM   Central America               PITCA   Pitcairn Astro 1967
CHATH   Chatham 1971                  QATAR   Qatar National
CHUAA   Chua Astro                    QORNO   Qornoq
CORRE   Corrego Alegre                RT90    Rt90 (Sweden)
CYPRU   Cyprus                        SAM56   Provisional So. Am 1956
DJAKA   Djakarta (Batavia)            SAM69   South American 1969
EGYPT   Egypt                         SCHWA   Schwarzeck
EUROP   European 1950 (All Europe)    SICIL   Sicily
EUR50   European 1950 (W. Europe)     SIERR
EUR79   European 1979                 SWISS
GANDA   Gandajika Base                TANAN   Tananarive Observatory
GEO49   Geodetic Datum 1949                   1925
GHANA                                 THAI    Indian (Thailand, Vietnam)
GRB36   Ordnance Survey of GB, 1936   TIMBA   Timbalai
GUAM    Guam                          TOKYO   Tokyo
GUNSG   G. Segara
GUNSR                                 VOIRO
HAWAI   Hawaii                        WGS72   World Geodetic System
HERAT   Herat North                           1972
HJORS   Hjorsey 1955                  YACAR   Yacare
HUTZU   Hu-tzu-shan                   ZANDE   Zanderij
INDIA   Indian (India, Nepal)
IRAN    Iran


132                Magellan GSC 100 Global Satellite Communicator
Specifications

  CHARACTERISTICS
  GPS Performance
     Acquisition Times (under optimal conditions):
       Warm Start       Approximately 20 seconds
       Cold Start       Approximately 55 seconds
       Update Rate      1 second (2D) typical
     Accuracy:
       Position         49 feet* (15 meters) RMS (with Selective
                        Availability turned off).
       Velocity         0.15 knots (0.14 mph)
       * Accuracy subject to degradation of 100m 2D RMS under
       the United States Department of Defense imposed Selective
       Availability.
     Limits:
       Speed            0 to 825 knots
  ORBCOMM Performance
       Data Rate        2400 bps Inbound
                        4800 bps Outbound
       Addressing       X.400 (Internet)
       Message Size     Standard Globalgram 2000 Bytes Max
                        Store & Fwd 229 Bytes Max
     Frequencies:
       Uplink           148.00 - 150.05 MHz
       Downlink         137.00 - 138.00 MHz




Magellan GSC 100 Global Satellite Communicator                133
      Physical Characteristics
          Size             8" x 3.5" x 1.75"
          Weight           32 ounces
          Housing          Splashproof construction
        Temp. Range:
          Operating        14F to 140F
                           (-10C to 60C)
          Storage          -40F to 167F
                           (-40C to 75C)
        Antennas:
          GPS              Internal Patch
          ORBCOMM          Telescoping
      Power
          Source           9.6 VDC Rechargeable NiCad Battery
                           Pack
                           10-30 VDC External Power
          Battery Life     Up to 10 hours
          Current Drain    300-350 mA @12V - GPS
                           400+ mA @12V - ORBCOMM




134                 Magellan GSC 100 Global Satellite Communicator
Coordinate Systems

  Positions are locations that are described in a unique way so that
  one location cannot be confused with another. This is done by
  using a coordinate system to describe locations. Your Magellan
  receiver has the ability to use any one of six different coordinates
  systems; LAT/LON (latitude and longitude), UTM (Universal
  Transverse Mercator), OSGB, Irish Grid, Swiss Grid or Swedish
  Grid. The one you select (in SETUP) will be determined by the
  maps and charts you use; you would generally want the receiver
  to display position coordinates in the same system that is used by
  your maps.
  LAT/LON Coordinate                       00
                                               .00
                                                   W
                                        115
  System. LAT/LON is the                 4230.0
                                                 0N

  most commonly used
  coordinate system today. It

                                                                   PR
  projects lines of latitude
                                                                      IM
                                                       Longitu



                                                                        EM
  (parallels) and lines of
                                                                          ERID
                                                     Latitude
  longitude (meridians) onto
                                                              de




                                                                               IAN
  the earth's surface. Lines of
                                                                              0

                                                                  0
  latitude are the equator and                            EQUATOR

  the horizontal lines that are
  parallel to it. Lines of
  longitude are the vertical
  lines that are perpendicular to the equator and pass through the
  poles. A position is described as being the intersection of a line of
  latitude and a line of longitude.
  Specifically, a position is up to 90 degrees north or south of the
  equator (up to the poles, which are 90N and 90S; the equator is
  0 latitude), and up to 180 degrees east or west of the Prime
  Meridian, which is 0 longitude. (The Prime Meridian passes
  through Greenwich, England.) Parts of a degree are minutes;
  there are 60 minutes (written as 60') to a degree. Minutes can also

Magellan GSC 100 Global Satellite Communicator                                       135
      be divided into smaller units. Fractions of a minute can be
      expressed as decimals or as seconds. (There are 60 seconds to one
      minute, written as 60"). So a Lat/Lon position coordinate can be
      expressed in two ways, which your Magellan GPS receiver
      displays as 2547.50 or 2547'30.
      UTM Coordinate System. Another commonly used coordinate
      system is UTM (Universal Transverse Mercator), which is
      generally found on land-based maps and quad sheets that are
      produced by government map providers. On land, you may find
      that UTM coordinates are easier to use than Lat/Lon.
      UTM coordinates are easy to use, but since the model it is based
      on is somewhat abstract, this section is a very simplified
      introduction to UTM.
      Instead of projecting an imaginary grid of intersecting lines onto
      the globe, UTM projects sections of the globe onto a flat surface.
      Each of these sections is called a "zone." There are 60 zones to
      cover the entire earth between 84N and 80S (polar areas are not
      described by UTM). Each zone is 6 wide as projected from the
      earth's center.
      A UTM position is described by three elements; the zone it is in,
      the easting, and the northing. Eastings and northings measure
      how far into a zone a position is in meters. Eastings are an east/
      west measurement, and correspond roughly to longitude.
      Northings are a north/south measurement, and correspond to
      latitude.
      This chart shows the position of Magellan Systems described in
      both Lat/Lon and UTM coordinates.

                   LAT/LON
                                                         UTM
  DEG/MIN.MM              DEG/MIN/SEC
        34 06.58N            34 06'35"N           11 4 23 818 E
       117 49.56W           117 49'34"W            37 74 624 N



136                 Magellan GSC 100 Global Satellite Communicator
180            150              120       90           60           30             0           30           60           90           120          150          180

     1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60




0




              3000 Km
              3000 Mi.
                Scale at the Equator.




NOTE: The area described by the UTM coordinate system extends to 84N and to 80S.




             Other Coordinate Systems. OSGB coordinates are similar to
             UTMs, but describe only Great Britain. They must be used with
             the GBR36 datum. This coordinate system cannot be used in any
             other part of the world. The GSC 100 automatically selects the
             GBR36 datum when the OSGB coordinate system is selected in
             Setup. (While OSGB coordinates must be used with the GBR36
             datum, the GBR36 datum can be used with LAT/LON
             coordinates; just be sure the map you are using uses both LAT/
             LON and GBR36.)

                                    If you select OSGBin the COORD SYS portion of the SETUP
                                    MENU, be sure to change the map datum back to the one you
                                    will be using (WGS84 is the default) when changing to another
                                    coordinate system.




     Magellan GSC 100 Global Satellite Communicator                                                                                                                   137
What is GPS?

      GPS is a constellation of navigation satellites that orbit the earth.
      The precise time and position information transmitted by these
      satellites is used by a GPS receiver to compute a position fix.
      The system is now officially declared "operational," and provides
      continuous, 24-hour 3D (position plus elevation) coverage
      anywhere on the earth.
      GPS was developed by the United States Department of Defense
      to provide consistent, reliable navigation information that is
      unaffected by rough terrain and bad weather, and is highly
      resistant to multipath errors and interference. The DoD continues
      to administer and control the Global Positioning System.
      Although GPS was developed as a military navigation system, its
      civilian and commercial uses were recognized. The satellites
      therefore transmit two codes, a military-only encrypted code
      (PPS) and a civilian-access, Standard Positioning Service (SPS)
      code. All commercial and consumer GPS receivers are SPS
      receivers.
      How Does GPS Work?
      Each GPS satellite transmits its precise location (position and
                                                 elevation) and the start
                                                 time of the
                                                 transmission. A GPS
                                                 receiver acquires the
                                                 signal, then measures
                                                 the interval between
                                                 transmission and receipt
                                                 of the signal to
                                                 determine the distance
                                                 between the receiver
                                                 and the satellite: this is


138                  Magellan GSC 100 Global Satellite Communicator
  ranging. Once the receiver has computed range for at least three
  satellites, its location on the surface of the earth can be
  determined.
  Every satellite transmits two types of data, almanac and
  ephemeris. Almanac data is general information on the location
  and health of each satellite in the constellation. Since it contains
  general information, an almanac can be collected from any
  satellite. A receiver with a current almanac in its memory knows
  where in the sky to look for satellites, given its last known
  position and the time of day. Ephemeris data is the precise
  satellite positioning information that is used for ranging. Each
  satellite transmits its own ephemeris data.
  Both almanac and ephemeris data are required for a GPS receiver
  to locate and acquire satellites quickly and compute a position fix.
  Your Magellan receiver copies these messages automatically.
  Accuracy
  GPS positioning with an SPS receiver that is intended for general
  use will produce an accuracy of 25 meters or better.
  In fact, SPS receivers have proven to be far more accurate than
  anyone anticipated. DoD has decided that 25-meter accuracy is a
  potential risk, and has introduced Selective Availability (SA) to
  maintain a military advantage. SA is a random error that is
  introduced to the SPS code ephemeris and timing data and
  reduces the accuracy of any SPS receiver. The size of the error
  changes, but rarely exceeds 100 meters.
  The DoD civil GPS user policy is that GPS accuracy as affected
  by SA is sufficient for general navigation. In an open
  environment, it usually is. Even with SA, a GPS receiver will
  bring you within visual range of a destination or target, and GPS
  remains the best available source of accurate, reliable navigation
  and positioning information.




Magellan GSC 100 Global Satellite Communicator                      139
      DGPS
      Differential GPS (DGPS) computes the size of the error and
      applies it to positioning information. There are several ways to
      perform DGPS, one of which is broadcast differential. Broadcast
      differential uses GPS receivers at control sites to measure the
      range errors for all visible satellites and determines a correction
      for each satellite. These corrections are broadcast in the RTCM
      SC-104 format by a radio beacon at the control site to any
      differential beacon receiver that is within range of the signal.
      The differential beacon receiver receives and demodulates the
      signal, then relays it to the user's differential-ready GPS receiver.
      The user's GPS receiver applies the corrections to the positioning
      information it collects to compute differentially corrected position
      and navigation data.
      This technique requires that your GPS receiver be connected to a
      compatible differential beacon receiver (such as the Magellan
      DBRTM, which is compatible will all differential-ready Magellan
      receivers). You must also be within range of a differential radio
      beacon.




140                  Magellan GSC 100 Global Satellite Communicator
What is ORBCOMM?

  System Description
  The ORBCOMM System uses Low-Earth Orbit (LEO) satellites
  instead of terrestrial fixed site relay repeaters to provide complete
  worldwide coverage. The system is capable of sending and
  receiving two-way alphanumeric packets, similar to two-way
  paging or e-mail. The three main components of the ORBCOMM
  System are; the space segment - the constellation of satellites; the
  ground segment - gateways which include the Gateway Control
  Centers (GCCs) and Gateway Earth Stations (GESs), and the
  Network Control Center (NCC) located in the United States; and
  subscriber communicators (SCs) - hand-held devices for personal
  messaging or fixed units for remote monitoring and tracking
  applications.


  Frequency Allocation
  The ORBCOMM System uses 137-138 MHz and 400 MHz
  frequencies for transmissions down to mobile or fixed data
  communications devices; and 148-150 MHz frequencies for
  transmissions up to the satellites. These frequencies, approved for
  use by LEO satellite systems at the World Administrative Radio
  Conference in February 1992, were allocated by the FCC to Little
  LEO mobile satellite services in January 1993. The FCC granted
  ORBCOMM a U.S. commercial license in October 1994.


  Space Segment
  The space segment is an array of up to 36 small communication
  satellites in circular orbit 825 km above the Earth. Twenty-eight
  of the satellites are planned to be put in service by Q'3 1998 with
  the remaining eight serving essentially as ground spares to be put
  into orbit when the system nears capacity.

Magellan GSC 100 Global Satellite Communicator                      141
      The main function of ORBCOMM's satellites is to complete the
      link between the GSC 100 and the switching capability at the
      U.S. NCC or a licensee's GCC. The satellites are "orbiting packet
      routers" ideally suited to "grab" small data packets from the GSC
      100 and relay them through a tracking Earth station and then to a
      GCC.


      Ground Segment
      The ground segment, which has most of the "intelligence" of the
      ORBCOMM System, is comprised of GCCs, GESs, and
      ORBCOMM's NCC which is located at ORBCOMM's
      headquarters in Dulles, VA. The NCC also serves as North
      America's GCC. Additionally, within the US, there are four GESs
      located in Arizona, Georgia, New York State and Washington
      State.


      Gateway Control Center (GCC)
      Located in each country that is licensed to use the ORBCOMM
      System, the GCC provides switching capabilities to link mobile
      SCs with terrestrial-based customer systems via standard
      communications modes including X.400, X.25, leased line,
      dial-up modem, public or private data networks, and e-mail
      networks including the Internet. Interfaces to the GCC enable
      reliable, efficient and cost effective integration of the
      ORBCOMM System into existing or new customer MIS systems.


      Gateway Earth Station (GES)
      ORBCOMM's GESs link the ground segment with the space
      segment and will be in multiple locations worldwide. The GESs
      provide the following functions:
       Acquire and track satellites based on orbital information from
        the GCC



142                 Magellan GSC 100 Global Satellite Communicator
   Transmit and receive transmissions from the satellites
   Transmit and receive transmissions from the GCC or NCC
   Monitor status of local GES hardware/software
   Monitor the system level performance of the satellite
    "connected" to the GCC or NCC


  The GES is redundant and has two steerable high-gain VHF
  antennas that track the satellites as they cross the sky. The GES
  transmits to the satellite at a frequency centered at 149.61 MHz at
  56.7 kbps with a nominal power of 200 watts. The GES receives
  3 watt transmissions from the satellite at 137-138 MHz range.
  These up and downlink channels have a 50 KHz bandwidth.


  Network Control Center (NCC)
  The NCC is responsible for managing the ORBCOMM network
  elements and the US gateways through telemetry monitoring,
  system commanding and mission system analysis. It provides
  network management of ORBCOMM's satellite constellation and
  is staffed seven days a week, 24 hours a day by
  ORBCOMM-certified controllers.


  What is the message process flow?
  A message sent from a remote unit in the US, either stationary or
  mobile, is received at the satellite and relayed down to one of four
  US GESs that connects the ORBCOMM ground system with the
  satellites. The GES then relays the message via satellite link or
  dedicated terrestrial line to the NCC. The NCC routes the
  message to the final addressee via e-mail, dedicated telephone
  line or facsimile. Messages originated outside the US are routed
  through GCCs in the same manner. The message types are:
  Outbound STANDARD, Outbound STORE & FWD, Inbound
  STANDARD and INBOUND STORE & FWD.


Magellan GSC 100 Global Satellite Communicator                    143
      Messages and data sent to a remote SC can be initiated from any
      computer using common e-mail systems including the Internet,
      cc:Mail, and Microsoft Mail. The NCC or GCC then transmits the
      information using ORBCOMM's global telecommunications
      network.




144                Magellan GSC 100 Global Satellite Communicator
Where to Get More Information

  There are many sources for more information on GPS and
  navigation. The sources listed here are just a few of the books,
  magazines, and Internet addresses that deal with GPS. Your local
  library is a good source for technical books on GPS and
  navigation.
  GPS Information Center
  The GPS Information Center provides general information on the
  Global Positioning System and satellite status. This center is
  operated by U.S. Coast Guard for the Department of
  Transportation, and was established to provide information and to
  serve as a point of contact for civilian GPS users.
      Voice telephone recording for constellation status: (703)
       313-5907
      Computer bulletin board: (703) 313-5910 (up to 14,400 bps)
       (8 data bits, 1 stop bit, no parity)
      24 hour operator: (703) 313-5900; fax: (703) 313-5920

         The GPS Information Center can NOT answer questions
         regarding the GSC 100. Please contact Magellan Customer
         Service at (909) 394-5000 for questions or assistance with
         using your receiver.


  A Comprehensive Guide to Land Navigation with GPS
  An excellent book written by Noel J. Hotchkiss and published by
  Alexis Publishing. ISBN No: 0-9641273-2-6. This book uses
  the Magellan GPS 4000 to discuss and describe land navigation




Magellan GSC 100 Global Satellite Communicator                        145
      with a GPS receiver. The book is very easy to read and gets into
      detail the art of navigating with GPS. (Available from Navtech
      Seminars.)
      Newsgroups (Internet)
      Several USENET newsgroups have occasional postings related to
      GPS. Some of the more popular newgroups for GPS are:
          sci.geo.satellite-nav
          rec.aviation.products
          rec.boats
          sci.space
          sci.space.news
      GPS World Magazine
      Monthly magazine covering a wide variety of uses for GPS
      receivers.
                 Advanstar Communications
                 859 Willamette Street
                 Eugene, Oregon 97401
                 U.S.A.
                 Phone: (503) 343-1200
                 Subscriptions: (800) 346-0085 x363
      Other Books of Note:
      Hofmann-Wellenhof, B., H. Lichtenegger, and J. Collins (1994).
      Global Positioning System, Theory and Practice. 3rd Edition.
      Springer-Verlag,
      326 pp.
      Institute of Navigation, The (1980). Global Positioning System.
      Vol. I.
      The Institute of Navigation (U.S.), 246 pp.
      Institute of Navigation, The (1984). Global Positioning System.
      Vol. II.




146                 Magellan GSC 100 Global Satellite Communicator
  The Institute of Navigation (U.S.), 257 pp.
  Institute of Navigation, The (1986). Global Positioning System.
  Vol. III.
  The Institute of Navigation (U.S.), 293 pp.
  Institute of Navigation, The (1986). Global Positioning System.
  Vol. IV.
  The Institute of Navigation (U.S.), 378 pp.
  Logsdon, T. (1992). Navstar Global Positioning System. Van
  Nostrand Reinhold, New York, 249 pp.
  These books and others not mentioned can be purchased from
  Navtech Book and Software Store (a division of Navtech
  Seminars, Inc.). They can be reached at:
      2775 S. Quincy St. #610
      Arlington, VA 22206-2204 U.S.A.
      Phone: (800) 628-0885
                (703) 931-0500
       Fax:     (703) 931-0503

  ORBCOMM Information
  Information regarding ORBCOMM can be found at the following
  internet location: www.orbcomm.com.




Magellan GSC 100 Global Satellite Communicator                 147
Abbreviations

      M     Degrees Magnetic north
      T     Degrees True north
      2D     Two-dimensional
      3D     Three-dimensional
      BRG    Bearing
      CDI    Course Deviation Indicator
      CLR    CLEAR
      CTS    Course To Steer
      DEG    Degrees
      DST    Distance
      FT     Feet
      GCC    Gateway Control Center
      GES    Gateway Earth Station
      GPS    Global Positioning System
      GQ     Geometric Quality
      HDG    Heading
      KM     Kilometers
      KH     Kilometers Per Hour
      KPH    Kilometers Per Hour
      KT     Knots
      LAT    Latitude
      LFIX   Last Fix
      LON    Longitude
      M      Meters
      MI     Miles


148            Magellan GSC 100 Global Satellite Communicator
   MIN       Minutes
   MNU       MENU
   MPH       Miles Per Hour
   NAV       NAVIGATE
   NM        Nautical Mile
   PC        Personal Computer
   SEC       Seconds
   SPD       Speed
   TTG       Time To Go
   UTM       Universal Transverse Mercator
   UT        Universal Time
   VMG       Velocity Made Good
   WPT       Waypoint
   WPTxx     Receiver-generated waypoint name
   XTE       Cross Track Error




Magellan GSC 100 Global Satellite Communicator   149
City Reference Chart

Australia & SW Pacific
Adelaide, Australia                  3456.00   S   13836.00   E
Alice Springs, N. Terr., Australia   2342.00   S   13352.00   E
Apia, W. Samoa                       1348.00   S   17145.00   W
Auckland, New Zealand                3655.00   S   17447.00   E
Bourail, New Caledonia               2134.00   S   16529.00   E
Brisbane, Queensland, Australia      2730.00   S   15300.00   E
Canberra, A.C.T., Australia          3518.00   S   14908.00   E
Coober Pedy, S. Australia            2856.00   S   13445.00   E
Dampier, W. Australia                2045.00   S   11648.00   E
Darwin, N. Terr., Australia          1223.00   S   13044.00   E
Derby, W. Australia                  1719.00   S   12338.00   E
Honiara, Guadalcanal Solomon Is.      928.00   S   15957.00   E
Iron Range, Queensland, Australia    1239.00   S   14313.00   E
Mount Isa, Queensland, Australia     2050.00   S   13929.00   E
Nadi, Vitti Levu Fiji                1747.00   S   17729.00   E
Newman, Mt. W.Australia              2320.00   S   11934.00   E
Ooldea, S. Australia                 3030.00   S   13145.00   E
Perth, W. Australia                  3158.00   S   11549.00   E
Port Moresby, Papua New Guinea        930.00   S   14707.00   E
Rawlinna, W. Australia               3100.00   S   12521.00   E
Timaru, New Zealand                  4423.00   S   17114.00   E
Townsville, Queensland, Australia    1913.00   S   14648.00   E

Asia
Bangalore, India                     1258.00   N    7735.00   E
Bangkok, Thailand                    1344.00   N   10030.00   E
Beijing, China                       3955.00   N   11626.00   E
Bombay, India                        1856.00   N    7251.00   E
Calcutta, India                      2230.00   N    8820.00   E
Colombo, Sri Lanka                    655.00   N    7952.00   E
Delhi, India                         2840.00   N    7714.00   E
Hanoi, Vietnam                       2101.00   N   10552.00   E
Harbin, China                        4545.00   N   12641.00   E
Ho Chi Minh City, Vietnam            1046.00   N   10643.00   E
Hong Kong                            2215.00   N   11410.00   E
Islambad, Pakistan                   3340.00   N    7308.00   E
Jakarta, Indonesia                    608.00   S   10645.00   E
Kagoshima, Japan                     3137.00   N   13032.00   E
Kandla, India                        2303.00   N    7011.00   E
Karachi, Pakistan                    2451.00   N    6702.00   E
Kathmandu, Nepal                     2742.00   N    8519.00   E
Kinabalu, Malaysia                    603.00   S   11632.00   E
Kota, Malaysia                        233.00   N   10210.00   E
Kuala Lumpur, Malaysia                308.00   N   10142.00   E
Kunming, China                       2504.00   N   10241.00   E


150                 Magellan GSC 100 Global Satellite Communicator
Malang, Indonesia               759.00    S     11245.00    E
Mandalay, Burma                2157.00    N      9604.00    E
Nagpur, India                  2110.00    N      7912.00    E
Padang, Indonesia               612.00    S     12027.00    E
Palu, Indonesia                 819.00    S     12144.00    E
Pinang, Malaysia                530.00    N     10028.00    E
Pontianak, Borneo               005.00    S     10916.00    E
Rangoon, Burma                 1647.00    N      9610.00    E
Sapporo, Japan                 4305.00    N     14121.00    E
Seoul, S. Korea                3730.00    N     12700.00    E
Shanghai, China                3106.00    N     12122.00    E
Sorong, Indonesia               050.00    S     13117.00    E
Surakarta, Indonesia            732.00    S     11050.00    E
Tanahmerah, Indonesia           608.00    S     14018.00    E
Taipei, Taiwan                 2505.00    N     12132.00    E
Thimphu, Bhutan                2732.00    N      8943.00    E
Tokyo, Japan                   3540.00    N     13945.00    E
Tonhil, Mongolia               4619.00    N      9354.00    E
Ulaanbaatar, Mongolia          4754.00    N     10652.00    E
rmqi, China                  4343.00    N      8738.00    E
Wuhan, China                   3035.00    N     11419.00    E
Xi'an, China                   3416.00    N     10854.00    E
Yumen, China                   3954.00    N      9743.00    E

CIS
Anadyr, Russia                 6450.00    N     17750.00    E
Arkhangel'sk, Russia           6432.00    N      4040.00    E
Ashkhabad, Turkmenistan        3758.00    N      5824.00    E
Baku, Azerbaijan               4022.00    N      4953.00    E
Balkhash, Kazakhstan           4650.00    N      7457.00    E
Barnaul, Russia                5321.00    N      8345.00    E
Chita, Russia                  5203.00    N     11335.00    E
Gizhiga, Russia                6200.00    N     16034.00    E
Igarka, Russia                 6731.00    N      8633.00    E
Inarigda, Russia               6315.00    N     10740.00    E
Kargasok, Russia               5907.00    N      8058.00    E
Khatanga, Russia               7159.00    N     10231.00    E
Kiev, Ukraine                  5025.00    N      3030.00    E
Krasnodar, Ukraine             4502.00    N      3900.00    E
Magdagachi, Russia             5327.00    N     12544.00    E
Moscow, Russia                 5545.00    N      3742.00    E
Okhotsk, Russia                5920.00    N     14315.00    E
Perm, Russia                   5801.00    N      5610.00    E
Petropavlovsk, Russia          5453.00    N      6913.00    E
Riga, Latvia                   5640.00    N     10610.00    E
Saratov, Russia                5130.00    N      4555.00    E
Tashkent, Uzbekistan           4116.00    N      6913.00    E
Tulun, Russia                  5432.00    N     10035.00    E
Vanino, Russia                 4905.00    N     14014.00    E
Vladivostok, Russia            4309.00    N     13153.00    E
Vorkuta, Russia                6727.00    N      6400.00    E
Yakutsk, Russia                6210.00    N     12950.00    E



Magellan GSC 100 Global Satellite Communicator               151
Middle East
Al Kuwayt, Kuwait                  2920.00   N     4800.00   E
Ar Riyad, Saudi Arabia             2439.00   N     4646.00   E
Baghdad, Iraq                      3320.00   N     4426.00   E
Bam, Iran                          3657.00   N     5756.00   E
Halab, Syria                       3614.00   N     3710.00   E
Herat, Afghanistan                 3420.00   N     6212.00   E
Jerusalem, Israel                  3147.00   N     3513.00   E
Kabul, Afghanistan                 3431.00   N     6912.00   E
Mashhad, Iran                      3616.00   N     5934.00   E
Nazw, Oman                        2256.00   N     5733.00   E
Salalah, Oman                      1700.00   N     5404.00   E
San' a, Yemen                      1524.00   N     4414.00   E
Shiraz, Iran                       2938.00   N     5234.00   E
Tabriz, Iran                       3805.00   N     4618.00   E
Tarim, S. Yemen                    1608.00   N     4858.00   E
Tehran, Iran                       3540.00   N     5126.00   E

Africa
Abidjan, Ivory Coast                519.00   N      401.00   W
Ad Dakhla, W. Sahara               2343.00   N     1557.00   W
Adis Abeba, Ethiopia                903.00   N     3842.00   E
Algiers, Algeria                   3650.00   N      300.00   E
Antananarivo, Madagascar           1852.00   S     4730.00   E
Asmera, Ethiopia                   1520.00   N     3858.00   E
Aswn, Egypt                       2405.00   N     3256.00   E
Bamako, Mali                       1240.00   N      759.00   W
Banghazi, Libya                    3207.00   N     2004.00   E
Bangui, Central African Republic    423.00   N     1837.00   E
Beira, Mozambique                  1949.00   S     3452.00   E
Cairo, Egypt                       3003.00   N     3115.00   E
Capetown, South Africa             3356.00   S     1828.00   E
Dakar, Senegal                     1440.00   N     1727.00   W
Fs, Morocco                       3405.00   N      500.00   W
Freetown, Sierra Leone              830.00   N     1317.00   W
Harare, Zimbabwe                   1750.00   S     3103.00   E
Kabwe, Zambia                      1429.00   S     2825.00   E
Kampala, Uganda                     019.00   N     3235.00   E
Kano, Nigeria                      1200.00   N      831.00   E
Khartoum, Sudan                    1533.00   N     3232.00   E
Kinshasa, Zaire                     418.00   S     1518.00   E
Kisangani, Zaire                    033.00   N     2514.00   E
Lagos, Nigeria                      627.00   N      328.00   E
Las Palmas, Canary Islands         2808.00   N     1527.00   W
Lindi, Tanzania                    1000.00   S     3941.00   E
Lobito, Angola                     1220.00   S     1334.00   E
Lom, Togo                          610.00   N      121.00   E
Lubumbashi, Zaire                  1141.00   S     2729.00   E
Lderitz, Namibia                  2638.00   S     1510.00   E
Lusambo, Zaire                      459.00   S     2326.00   E
Maputo, Mozambique                 2558.00   S     3235.00   E
Maseru, Lesotho                    2919.00   S     2729.00   E
Mbale, Uganda                       104.00   N     3412.00   E


152                Magellan GSC 100 Global Satellite Communicator
Mogadishu, Somalia                202.00   N    4521.00   E
Monrovia, Liberia                 620.00   N    1046.00   W
Mwanza, Zaire                     751.00   S    2643.00   E
N' Djamena, Chad                 1210.00   N    1459.00   E
Nairobi, Kenya                    117.00   S    3650.00   E
Namibe, Angola                   1510.00   S    1209.00   E
Nouakchott, Mauritania           1809.00   N    1558.00   W
Ouagadougou, Burkina Faso        1220.00   N     140.00   W
Pointe Noire, Congo               446.00   S    1153.00   E
Port Elizabeth, South Africa     3358.00   S    2536.00   E
Sabha, Libya                     2702.00   N    1426.00   E
Serowe, Botswana                 2225.00   S    2644.00   E
Sidi Ifni, Morocco               2924.00   N    1012.00   W
Toliara, Madagascar              2320.00   S    4341.00   E
Tombouctou, Mali                 1649.00   N     259.00   W
Tripoli, Libya                   3254.00   N    1311.00   E
Tsumeb, Namibia                  1913.00   S    1742.00   E
Tunis, Tunisia                   3650.00   N    1013.00   E
Windhoek, Namibia                2234.00   S    1706.00   E
Yaounde, Cameroon                 351.00   N    1131.00   E
Zanzibar, Zanzibar                610.00   S    3912.00   E

Europe
Athens, Greece                   3800.00   N    2344.00   E
Barcelona, Spain                 4123.00   N     211.00   E
Bern, Switzerland                4657.00   N     726.00   E
Bordeaux, France                 4450.00   N     034.00   W
Brno, Czechoslovakia             4913.00   N    1640.00   E
Bucuresti, Romania               4425.00   N    2607.00   E
Budapest, Hungary                4730.00   N    1903.00   E
Cork, Ireland                    5154.00   N     828.00   W
Gdansk, Poland                   5422.00   N    1841.00   E
Glasgow, Scotland                5553.00   N     415.00   W
Godthb, Greenland               6415.00   N    5135.00   W
Hamburg, Germany                 5333.00   N    1000.00   E
Istanbul, Turkey                 4102.00   N    2857.00   E
London, England                  5130.00   N     010.00   W
Longyearbyen, Svalbard, Norway   7812.00   N    1540.00   E
Madrid, Spain                    4025.00   N     343.00   W
Napoli, Italy                    4050.00   N    1416.00   E
Nice, France                     4342.00   N     716.00   E
Nuugaatsiaq, Greenland           7130.00   N    5300.00   W
Oslo, Norway                     5956.00   N    1045.00   E
Paris, France                    4852.00   N     220.00   E
Reykjavik, Iceland               6409.00   N    2158.00   W
Scoresbysund, Greenland          7030.00   N    2200.00   W
Stensele, Sweden                 6505.00   N    1710.00   E
Stockholm, Sweden                5920.00   N    1805.00   E
Thule, Greenland                 7635.00   N    6830.00   W
Torshavn, Faeroes                6202.00   N     647.00   W
Trabzon, Turkey                  4100.00   N    3943.00   E
Vardo, Finland                   6016.00   N    2020.00   E



Magellan GSC 100 Global Satellite Communicator              153
The Americas
Albany, NY, U.S.A.                 4240.00   N    7349.00   W
Alburquerque, NM, U.S.A.           3505.00   N   10638.00   W
Amarillo, TX, U.S.A.               3514.00   N   10150.00   W
Anchorage, AK, U.S.A.              6110.00   N   15000.00   W
Antofagasta, Chile                 2340.00   S    7023.00   W
Arequipa, Peru                     1625.00   S    7132.00   W
Atlanta, GA, U.S.A.                3345.00   N    8423.00   W
Barrow, AK, U.S.A.                 7116.00   N   15650.00   W
Baton Rouge, LA, U.S.A.            3030.00   N    9110.00   W
Belem, Brazil                       127.00   S    4829.00   W
Bethel, AK, U.S.A.                 6049.00   N   16149.00   W
Billings, MT, U.S.A.               4547.00   N   10830.00   W
Birmingham, AL, U.S.A.             3330.00   N    8655.00   W
Bismarck, ND, U.S.A.               4650.00   N   10048.00   W
Bogot, Colombia                    438.00   N    7405.00   W
Boise, ID, U.S.A.                  4338.00   N   11612.00   W
Boston, MA, U.S.A.                 4220.00   N    7105.00   W
Brasilia, Brazil                   1545.00   S    4757.00   W
Buffalo, NY, U.S.A.                4252.00   N    7855.00   W
Caracas, Venezuela                 1035.00   N    6656.00   W
Casper, WY, U.S.A.                 4250.00   N   10618.00   W
Cayenne, French Guiana              455.00   N    5220.00   W
Charlotte, NC, U.S.A.              3503.00   N    8050.00   W
Chicago, IL, U.S.A.                4150.00   N    8745.00   W
Chihuahua, Mexico                  2840.00   N   10606.00   W
Churchill, Mannitoba Canada        5845.00   N    9300.00   W
Cleveland, OH, U.S.A.              4130.00   N    8141.00   W
Comodoro R, Argentina              4550.00   S    6730.00   W
Coppermine, NW Terr., Canada       6749.00   N   11512.00   W
Crdoba, Veracruz Mexico           1855.00   N    9655.00   W
Cuiab, Brazil                      715.00   S    5825.00   W
Dallas, TX, U.S.A.                 3247.00   N    9648.00   W
Denver, CO, U.S.A.                 3945.00   N   10500.00   W
Des Moines, Iowa, U.S.A.           4135.00   N    9335.00   W
Detroit, MI, U.S.A.                4223.00   N    8305.00   W
Duluth, MN, U.S.A.                 4645.00   N    9210.00   W
Fairbanks, AL, U.S.A.              6450.00   N   14750.00   W
Fort McPherson, NW Terr., Canada   6729.00   N   13450.00   W
Fort Providence, NW Terr, Canada   6103.00   N   11740.00   W
Georgetown, Guyana                  646.00   N    5810.00   W
Grand Rapids, MI, U.S.A.           4257.00   N    8640.00   W
Guadalajara, Mexico                2040.00   N   10320.00   W
Guantnamo, Mexico                 2009.00   N    7514.00   W
Guatemala, Guatemala               1438.00   N    9022.00   W
Guayaquil, Equador                  213.00   S    7954.00   W
Hazelton, BC Canada                5515.00   N   12738.00   W
Houston, TX, U.S.A.                2945.00   N    9525.00   W
Ilhus, Brazil                     1450.00   S    3906.00   W
Indianapolis, IN, U.S.A.           3945.00   N    8610.00   W
Iquitos, Peru                       351.00   S    7313.00   W
Juneau, AK, U.S.A.                 5820.00   N   13420.00   W
Kansas City, MO, U.S.A.            3902.00   N    9433.00   W
La Habana, Cuba                    2308.00   N    8222.00   W


154               Magellan GSC 100 Global Satellite Communicator
Labrador City, NFLD, Canada       5256.00   N    6652.00   W
Las Vegas, NV, U.S.A.             3610.00   N   11510.00   W
Lima, Peru                        1206.00   S    7703.00   W
Little Rock, AR, U.S.A.           3442.00   N    9217.00   W
Los Angeles, CA, U.S.A.           3400.00   N   11815.00   W
Louisville, KY, U.S.A.            3813.00   N    8548.00   W
Managua, Nicaragua                1206.00   N    8618.00   W
Manaus, Brazil                     306.00   S    6000.00   W
Merida, Venezuela                  824.00   N    7108.00   W
Miami, FL, U.S.A.                 2545.00   N    8015.00   W
Milwaukee, WI, U.S.A.             4303.00   N    8756.00   W
Minneapolis, MN, U.S.A.           4500.00   N    9315.00   W
Montevideo, Uruguay               3455.00   S    5610.00   W
Nakina, BC, Canada                5912.00   N   13248.00   W
Nashville, TN, U.S.A.             3610.00   N    8650.00   W
New York, NY, U.S.A.              4043.00   N    7401.00   W
Norfolk, VA, U.S.A.               3654.00   N    7618.00   W
Oklahoma City, OK, U.S.A.         3528.00   N    9733.00   W
Omaha, NE, U.S.A.                 4115.00   N    9600.00   W
Panama City, Florida              3010.00   N    8541.00   W
Panama City, Panama                857.00   N    7930.00   W
Peace River, Alberta Canada       5615.00   N   11718.00   W
Peoria, IL, U.S.A.                4043.00   N    8938.00   W
Phoenix, AZ, U.S.A.               3330.00   N   11203.00   W
Pittsburgh, PA, U.S.A.            4026.00   N    8000.00   W
Port-au-Prince, Haiti             1833.00   N    7220.00   W
Portland, OR, U.S.A.              4532.00   N   12240.00   W
Porto Velho, Brazil                845.00   S    6354.00   W
Qubec, Qubec, Canada            4650.00   N    7115.00   W
Rapid City, SD, U.S.A.            4406.00   N   10314.00   W
Recife, Brazil                     806.00   S    3453.00   W
Reno, NV, U.S.A.                  3932.00   N   11949.00   W
Rio de Janeiro, Brazil            2253.00   S    4317.00   W
Salt Lake City, UT, U.S.A.        4045.00   N   11155.00   W
San Antonio, TX, U.S.A.           2925.00   N    9830.00   W
San Francisco, CA, U.S.A.         3745.00   N   12227.00   W
San Juan, Puerto Rico             1829.00   N    6608.00   W
Santarm, Brazil                   226.00   S    5441.00   W
So Paulo, Brazil                 2333.00   S    4639.00   W
Saskatoon, Saskatchewan, Canada   5210.00   N   10640.00   W
Seattle, WA, U.S.A.               4735.00   N   12220.00   W
Shreveport, LA, U.S.A.            3230.00   N    9346.00   W
Sioux Falls, SD, U.S.A.           4334.00   N    9642.00   W
Spokane, WA, U.S.A.               4740.00   N   11725.00   W
St Louis, MO, U.S.A.              3840.00   N    9015.00   W
Tampa, FL, U.S.A.                 2758.00   N    8238.00   W
Tijuana, Mexico                   3229.00   N   11710.00   W
Toronto, Ontario, Canada          4342.00   N    7925.00   W
Valparaiso, Brazil                2116.00   S    5054.00   W
Vancouver, BC, Canada             4913.00   N   12306.00   W
Veracruz, Mexico                  1911.00   N    9610.00   W
Washington, D.C., U.S.A.          3855.00   N    7702.00   W
Whitehorse, Yukon Terr., Canada   6041.00   N   13508.00   W
Wichita, KS, U.S.A.               3743.00   N    9720.00   W


Magellan GSC 100 Global Satellite Communicator               155
Winnipeg, Manitoba, Canada       4953.00    N     9710.00   W
Pacific Ocean
American Samoa                   1420.00    S    17000.00   W
Baker I.                          012.00    N    17628.00   W
Easter I.                        2705.00    S    10920.00   W
Gambier I.                       2310.00    S    13500.00   W
Honolulu, HA, U.S.A.             2119.00    N    15750.00   W
Howland I.                        048.00    N    17638.00   W
Jarvis I.                         023.00    S    16002.00   W
Kanton I.                         250.00    S    17140.00   W
Lihue                            2159.00    N    15923.00   W
Palmyra I.                        552.00    N    16205.00   W
Pitcairn I.                      2504.00    S    13006.00   W
Swains I.                        5930.00    S      10000    W




156               Magellan GSC 100 Global Satellite Communicator
Connecting External Power/Devices

  The GSC 100 comes with a data power extension cable, shown
  below, that connects your GSC 100 to the AC power cable for
  external power. It also connects the RS-232 software update
  cable for uploading software and connects to various accessories.
  Data Power Extension Cable




  To connect to external power, connect the screw-lock sleeve ,
  shown above, to the RS-232/Power port on the side of the GSC
  100. Take the AC power adapter cable, shown on the following
  page, and snap it onto the available end of the data power
  extension cable. Make sure that the connections are snug so as
  not to disconnect during use. The AC power adapter cable is now
  ready to plug into external power.

       Use care when connecting the cables so as not to damage the
       connectors and contacts. Make sure the pins are correctly
       aligned before fastening.




Magellan GSC 100 Global Satellite Communicator                       157
      AC Power Cable




      To connect the RS-232 software update cable, connect the screw-
      lock sleeve on the data power extension cable, shown on the
      previous page, to the RS-232/Power port on the side of the GSC
      100. Take the RS-232 software update cable, shown below, and
      snap it onto the available end of the data power extension cable.
      Make sure that the connections are snug so as not to disconnect
      during use. The RS-232 software update cable is now ready to
      connect to the 9-pin serial port on your PC.
      RS-232 Software Update Cable




158                 Magellan GSC 100 Global Satellite Communicator
  The following accessories can be obtained from Magellan
  Systems Corporation or any Magellan-authorized dealer. They
  connect to your GSC 100 through the data power extension cable:
  DC Power Cigarette Lighter Adapter - allows you to connect
  the unit to power using a cigarette lighter.




  Power Data Adapter Cable - allows access to serial port and
  NMEA interface for GPS operations and the RS-232 data
  download cable that ships with the unit.




  Additional Accessories - The items listed below can be obtained
  from your local GSC 100 dealer:
  Carrying Case
  External Antennas (GPS & ORBCOMM)
  Swivel Mounting Bracket
  PC Software Kit
  Data/Charger Module


Magellan GSC 100 Global Satellite Communicator                  159
Glossary

Active Leg       The segment of a route currently being travelled.
Address          The logical or Internet address is used to facilitate
                 moving data between physical networks. Identifier
                 assigned to networks, stations and other devices so
                 that each device can be separately designated to
                 receive and reply to messages. Each host computer
                 on the Internet has a unique address.
Azimuth Angle The angle of the line-of-site vector, projected on the
              horizontal plane, measured clockwise from true
              North.
Backtrack        Retraces the position fixes (up to 21) stored
                 automatically by the GSC 100 every 10 minutes.
Baud             A measure of the speed of data transmission. Baud
                 and bit rate are the same for direct equipment
                 interconnections (e.g. via RS-232). Baud and bit
                 rate are not the same for modulated data links,
                 whether wire or radio.
Baud Rate        Measure of data transmission speed, expressed in
                 bits per second or bps.
Bearing          The compass direction from your position to a
                 destination, measured to the nearest degree.
Bit              Binary Digit. The smallest unit of information into
                 which digital data can be subdivided and which a
                 computer can hold. Each bit has only two values,
                 one or zero.
Channel          Either a single frequency or a pair of radio
                 frequencies used as a communication path.




160               Magellan GSC 100 Global Satellite Communicator
Configuration     A set of conditions or parameters that define, track,
                  maintain and audit the structure of an item. The
                  term configuration can define the hardware
                  components and/or the software code and files that
                  comprise a subsystem or system.
Coordinates       A unique numeric or alphanumeric description of
                  position.
Course            The direction in degrees from the start landmark of
                  a course line to its destination.
CTS               Course to steer. The optimum direction the vessel
                  should be steered in order to efficiently make
                  headway back to the courseline while also
                  proceeding toward the destination landmark. It is a
                  "compromise" course bearing that projects from
                  your current position to a point on the courseline
                  midway between a point perpendicular to your
                  position and the current leg destination landmark.
Data Rate         The maximum number of bits of information which
                  can be transmitted per second, as in a data
                  transmission link; typically expressed as megabits
                  per second (Mb/s).
Datum             Refers to the theoretical mathematical model of the
                  earth's sea level surface. Map makers may use a
                  different model from which to chart their maps, so
                  position coordinates will differ from one datum to
                  another. The datum for the map you are using can
                  be found in the legend of the map.
Default Setting A preset or initial value that is assumed to be the
                preferred or appropriate selection for most
                situations.
Differential GPS A procedure of correction global positioning system
                 (GPS) solutions to achieve improved position
                 accuracy. Differential GPS provides 2 to 5 meter
                 position accuracy.

Magellan GSC 100 Global Satellite Communicator                        161
E-Mail           Electronic Mail. A method of file transfer and
                 message sending among workstations.
Elevation        Distance above or below mean sea level.
Elevation Angle The angle between the line of sight vector and the
                horizontal plane.
EPE              Estimated Position Error is the approximate error
                 (between 0 and X) introduced in the ephemeris
                 signal by the U.S. Department of Defense for
                 reasons of security. This random error, known as
                 Selective Availability (SA) is not due to receiver
                 error and is not significant enough to affect
                 navigation for most purposes
Frequency        The number of vibrations per second of an audio or
                 radio signal. Measured in hertz (Hz), kilohertz
                 (kHz) or megahertz (MHz).
Gateway          1) Provides message processing and subscriber
                 management for the defined service area. 2) A
                 hardware/software package that runs on the open
                 system interconnection (OSI) application layer and
                 allows incompatible protocols to communicate;
                 includes X.25 gateways. 3) A relay at any layer
                 above the network layer.
Gateway          The GCC acts as the Operations Center for all
Control          Gateway activities. All communications must pass
Center (GCC)     through an ORBCOMM GCC.
Gateway          Interacts with the Network Management System
Data System      and Network Data Server to exchange network
                 status and system performance information.
Gateway          Used by the satellites to send traffic, telemetry and
Downlink         network management packets to the NCCs.
Channels




162               Magellan GSC 100 Global Satellite Communicator
Gateway        The GES provides interconnection between the
Earth          OMS and the satellite constellation. The GES
Station(GES)   consists of medium gain tracking antennas, RF and
               modem equipment, and communications hardware
               to send and receive ORBCOMM data packets. A
               single GES can communicate with multiple
               satellites within its main beam.
Gateway        The GMS provide management functions,
Management     including; supervision of the health and status of
System(GMS)    various systems and equipment in the Gateway;
               monitoring physical facilities that house the
               Gateway elements; monitoring message processing
               flow and throughput; monitoring status of
               interconnecting links that connect the GES to GSS;
               providing the interface between the Gateway and
               ORBCOMM NCC.
Gateway        Used by the NCCs to send traffic and commands
Uplink         to the satellites.
Channels
Geometric      Measures the probable accuracy of a position fix,
Quality        based on the position of the satellites relative to
               each other.
Globalgram     A single, self-contained packet sent or received by a
               subscriber communicator. Standard and Store &
               Fwd messages are considered globalgrams.
GO TO          A single leg route with the present position being
               the start of the route and a defined landmark as the
               destination. (If the unit has been moved while
               turned off and has not yet acquired a new position
               fix, the start of the GO TO will be the position fix
               last recorded.)




Magellan GSC 100 Global Satellite Communicator                   163
Heading           The direction in which the GSC 100 is moving,
                  track or ground course. May be different from the
                  course.
Internet          A concatenation of many individual TCP/IP
                  networks into one single logical network all sharing
                  a common addressing scheme.
Last Fix          Position coordinates computed and stored
                  automatically every 10 minutes in the Last Fix
                  Buffer.
Last Fix Buffer The list of the most recent last fixes automatically
                stored by the GSC 100.
Latitude          The angular distance north or south of the equator
                  measured by lines encircling the earth parallel to
                  the equator in degrees from 0 to 90.
LAT/LON           Coordinate system using latitude and longitude
                  coordinates to define a position on the earth.
Leg (Route)       A segment of a route that has a starting (FROM)
                  landmark and a destination (TO) landmark. A route
                  may consist of 1 or more legs. A route that is from
                  landmark A to landmark B to landmark C to
                  landmark D has three legs with the first being from
                  landmark A to landmark B.
Longitude         The angular distance east or west of the prime
                  meridian (Greenwich meridian) as measured by
                  lines perpendicular to the parallels and converging
                  at the poles from 0 to 180.
Magnetic North The direction toward the north magnetic pole from
               the observer's position.
Modem             A modulator/demodulator that converts digital data
                  into analog (waveform) signals for transmission
                  along media that carry analog signals and converts
                  received analog signals back into digital data for
                  use by the computer.

164               Magellan GSC 100 Global Satellite Communicator
Network        The NCC houses the computer systems and
Control Center personnel (Gateway Operators) responsible for
(NCC)          managing the Satellites and the US ORBCOMM
               Gateway and for supporting Licensee's
               ORBCOMM Gateways.
Network        1) A system that sends and receives data and
               messages, typically over a cable. A network
               enables a group of computers to with each other,
               share peripherals (such as hard disks and printers),
               and access remote hosts or other networks. 2) A
               series of points interconnected by communication
               channels. The switched telephone network consists
               of public telephone lines normally used for dialed
               telephone calls; a private network is a configuration
               of communication channels reserved for the use of
               a sole customer. A series of nodes connected by
               communications channels.
ORBCOMM          The ORBCOMM mobile, wireless satellite
                 communications system is a wide are, packet
                 switched, two-way data system. Communications
                 to and from a mobile ORBCOMM subscriber to the
                 Gateway is accomplished by use of a constellation
                 of low Earth orbit satellites.
OSGB             A coordinate system describing only Great Britain,
                 similar to UTMs. Used with GBR36 datum.
Pin Code         The OMS maintains a 4-digit number Personal
                 Identification Number (PIN) code for each SC.
Position Fix     Position coordinates as computed by the GSC 100.
Queue            A line or list formed by items waiting for service,
                 such as tasks waiting to be performed, stations
                 waiting for connection or messages waiting for
                 transmission.
Queuing          Temporarily storing packets until a task or resource
                 can consume or route them.

Magellan GSC 100 Global Satellite Communicator                     165
Receiver        A detector and electronic circuitry to change optical
                signals to electrical signals.
Reverse Route   Reverses the order of landmarks in an existing
                route.
Satellite       Described by the number of satellites, the number
Constellation   of planes, the altitude, the inclination, the spacing
                of the right ascension of ascending nodes of the
                planes and the relative phasing of the satellites
                between and within the planes.
Selective       A random error that is introduced by the
Availability    Department of Defense, to the Standard Positioning
                Service (SPS) code ephemeris and timing data that
                reduces the accuracy of any SPS. The size of the
                error changes, but rarely exceeds 100 meters.
Serial Port     A port in which each bit of information is brought
                in/out on a single channel. Serial ports are
                designated for devices that receive data one bit a t a
                time.
Store & Fwd     Store & Fwd messages are up to 229 user bytes per
                packet to be sent by the SC and 182 user bytes per
                packet to be received.
Subscriber      Manages the configuration of each subscriber
Database        account.
Management
Subscriber      Sets up accounts for Gateway customer subscribers
Provisioning    and configures, activates and deactivates SCs.
Server          managing the Satellites and the US ORBCOMM
                Gateway and for supporting Licensee's
                ORBCOMM Gateways.
Terminal        A device, usually equipped with a keyboard and
                display, capable of sending and receiving data over
                a communications link.




166             Magellan GSC 100 Global Satellite Communicator
Time To Go      The estimated time for the receiver to reach the
                destination from its current position based on the
                current VMG.
True North      The direction to the geographical North Pole from
                an observer's position. The north direction on any
                geographical meridian.
Track           The actual path travelled, may differ from the
                planned course.
Track History   The track over a selected period of time.
UT              Universal Time, formerly referred to as Greenwich
                Mean Time (GMT).
UTM             Universal Transverse Mercator (UTM) metric grid
                system used on most large and intermediate scale
                land topographic charts and maps.
VMG             Velocity Made Good. The component of the
                velocity that is in the direction of the destination.
Waypoint        A location saved in the unit's memory which is
                obtained by entering data, editing data, calculating
                data or saving a current position. Used to create
                routes.
2-D             Two Dimensional. A 2-D position is defined as
                latitude and longitude. Altitude is assumed to be
                fixed.
2-D GPS Mode A procedure for determining a 2-D position using
             signals received from the best (for only) three
             available GPS satellites. Altitude is assumed to be
             known and constant. A 2-D position solution will
             only be determined if signals from three or more
             satellites are available.
3-D             Three Dimensional. A 3-D position is defined as
                latitude, longitude and altitude.



Magellan GSC 100 Global Satellite Communicator                          167
3-D GPS Mode A procedure for determining a 3-D position using
             signals received from the best (for only) four
             available GPS satellites. A 3-D position solution
             will only be determined if signals from four or more
             satellites are available.




168              Magellan GSC 100 Global Satellite Communicator
Index

A
Abbreviations 148
ABOUT Screen 110
Accuracy 139
Activation. See Messaging Activation
Address Book 36
  capturing an address 39
  creating a new address 37
  deleting an address 38
  editing an address 38
  selecting recipients from the address book 52
  speed dial addresses 40
  viewing an address 36
Antenna 12
  GPS 4
  ORBCOMM Telescopic 4
Auto Message Check 35
AUTO Mode. See System Modes: AUTO mode

B
Backtrack 92
Batteries 7
  charging 8
Baud Rate (NMEA) 102
Baud Rate (RS-232) 103

C
City Reference Chart 150
Clearing/Erasing
  clear menu 103

Magellan GSC 100 Global Satellite Communicator    169
  clearing receiver memory 111
  erasing all waypoints from waypoint list 110
  erasing last fixes 109
  erasing track from the plotter screen 110
Contrast 103
Coordinate Systems 135
  setting 95
Customer Service 123

D
Datums 132
Distance Units 97

E
Elevation Mode 96
Elevation Units 98
Erasing. See Clearing/Erasing
External Power/Devices 157
  connecting ac power cable 158
  connecting data power extension cable 157
  connecting RS-232 software update cable 158
  dc power cigarette lighter adapter 159
  power data adapter cable 159

F
Font Size 33

G
Gateway Control Center (GCC) 142
  setting the preferred GCC 32
Gateway Earth Station (GES) 142
Getting Started 4
GlobalGrams 45
  copying 57
  creating 45

170                 Magellan GSC 100 Global Satellite Communicator
  deleting 61
  editing 56
  forwarding 59
  inserting symbols and characters into GlobalGrams 53
  replying to 58
  requesting message check 20, 41
  sending a GlobalGram to a GSC 100 51
  sending Standard GlobalGrams 18, 47
  sending Store & Fwd GlobalGrams 49
  Standard 45
  Store & Fwd 45
  viewing created GlobalGrams 54
  viewing received GlobalGrams 43
Glossary 160
GOTO
  activating 82
  creating 25
  creating with PAN N SCAN 72
GPS Mode. See System Modes: GPS mode
GPS Satellite Status Screen 106
GPS System Description 138

I
Icons 112
   GPS 64
   Messaging (ORBCOMM) 42
   waypoint designators 23
Initialization
   GPS 9, 94
   ORBCOMM 31
Inputting Data 27
Inserting Symbols And Characters Into GlobalGrams 53
Introduction 1




Magellan GSC 100 Global Satellite Communicator           171
L
Last Fix
  last fix buffer 92
  viewing 93
  viewing the last fix trip summary screen 93
Leg
  adding 89
  deleting 88
  inserting a leg in a route 87
  navigating (activating) 91
  viewing the legs of a route 87
Light 27
  setting timer 100

M
Mailbox 55
Main Menu 28
Man-Over-Board (MOB) 92
Map Datum 98
Message Check. See GlobalGrams: requesting message check
Message Status 62
Messaging Activation 3
Messaging Operations 30
Modes. See System Modes
Multi-Leg Route. See Routes: creating a multi-leg route

N
NAV Screens 65
 customizing 67
   NAV 1 screen 68
   NAV 2 screen 69
 NAV 1 screen 66
 NAV 2 screen 66
 plot screens 69


172              Magellan GSC 100 Global Satellite Communicator
     changing the plotter scale 71
     using PAN N SCAN 71
     viewing the PLOT screen 70
     viewing the POINTER screen 69
     viewing the ROAD screen 73
  viewing the POSITION screen 65
Navigating 25
Network Control Center (NCC) 143
NMEA 125
  setting NMEA port 102
North Reference 98

O
Odometer
  resetting 107
  resetting trip 107
  viewing 107
ORBCOMM Mode. See System Modes: ORBCOMM mode
  selecting 30
ORBCOMM Satellite Status Screen 105
ORBCOMM System Description 141

P
Packing List 2
PAN N SCAN 71
PLOT Screen. See NAV Screens: plot screens: viewing the PLOT
     screen
PLOT Screens. See NAV Screens: plot screens
Plot Setup 99
Plotter Scale 71
POINTER Screen. See NAV Screens: plot screens: viewing the
     POINTER screen
Position
  saving as a waypoint 73
  saving with a receiver-generated name 74


Magellan GSC 100 Global Satellite Communicator                 173
  saving with a user-created name 74
Position Fix
  taking first fix 21
POSITION Screen. See NAV Screens: viewing the POSITION
     screen
Power 9
  turning OFF 9, 27
  turning ON 9, 26
Power Savings Mode (Sampling) 101

R
Receiver Description 4
Reception. See Signal Reception
Reference 26
Reset 111
ROAD Screen. See NAV Screens: plot screens: viewing the ROAD
     screen
Routes 81
  accessing the route menu 83
  activating a GOTO route 82
  activating and deactivating 85
  adding a leg 89
  creating a backtrack route 92
  creating a multi-leg route 84
  deleting a leg 88
  deleting a route 91
  inserting a leg in a route 87
  navigating (activating) a leg 91
  replacing a waypoint 90
  reversing 86
  viewing the legs of a route 87
  viewing the route summary (edit) 86

S
Sampling 101


174             Magellan GSC 100 Global Satellite Communicator
Satellite
  GPS. See GPS Satellite Status Screen
Satellite Status Screen
  ORBCOMM. See ORBCOMM Satellite Status Screen
Serial Number 3
  ABOUT screen 110
Setup Menu 94
Setup Options 94
  contrast 103
  default characters 33
  display characters setting 34
  font size 33
  GCC selection 32
  initializing the receiver 94
  plot setup 99
  sampling 101
  selecting clear menu 103
  selecting map datum 98
  selecting RS-232 port and baud rate 103
  selecting the last fix interval 99
  selecting time format 100
  selecting waypoint sort 99
  setting distance units 97
  setting elevation units 98
  setting NMEA port and baud rate 102
  setting north reference 98
  setting speed units 97
  setting the coordinate system 95
  setting the elevation mode 96
  setting the light timer 100
  setting velocity averaging 97
Signal Reception 12
Simulator
  GPS 108
  ORBCOMM 109
Specifications

Magellan GSC 100 Global Satellite Communicator   175
  GPS system 133
  ORBCOMM system 133
Speed Dial. See Address Book: speed dial addresses
Speed Units. See Setup Options: setting speed units
Sun/Moon Screen 108
Symbols 6, 53
System Modes 14, 29
  AUTO mode 14, 29
  GPS mode 14, 29
  ORBCOMM mode 14, 29

T
Time Format 100
Troubleshooting 119

U
UTM Coordinate System 136

V
Velocity Averaging 97

W
Warning Messages 115
Waypoints 73
 accessing the waypoint function menu 78
 accessing the waypoint menu 76
 creating 75
 deleting 80
 editing 78
 naming 74
 projecting 79
 replacing 90
 saving 22
 sort 99
 viewing 77

176              Magellan GSC 100 Global Satellite Communicator
Magellan Systems Corporation                             Limited Warranty
All Magellan GPS receivers are navigational aids, and are not intended to
replace other methods of navigation. The purchaser is advised to perform
careful position charting and use good judgement. Read the User Guide
carefully before using this product.

1.   MAGELLAN SYSTEMS CORPORATION WARRANTY
Magellan Systems Corporation warrants their GPS receiver and
accessories to be free of defects in material and workmanship for a
period of one year from the date of original purchase. This warranty
applies only to the original purchaser of this product.
In the event of a defect, Magellan Systems Corporation will, at its
option, repair or replace the product with no charge to the purchaser
for parts or labor. The repaired or replaced product will be warranted
for ninety (90) days from the date of return shipment, or for the
balance of the original warranty, whichever is longer.

2.   PURCHASER'S REMEDY
Purchaser's Exclusive Remedy under this written warranty or any
implied warranty shall be limited to the repair or replacement, at
Magellan Systems Corporation's option, of any defective part of the
receiver or accessories which are covered by this warranty. Repairs
under this warranty shall only be made at an authorized Magellan
Service Center.

3.   PURCHASER'S DUTIES
To obtain warranty service, the purchaser must return the receiver or
accessories postpaid, with proof of the date of original purchase and
purchaser's return address to Magellan Authorized Service Centers. Prior
to returning your receiver the purchaser must first contact Magellan for
return authorization.

4.   LIMITATION OF IMPLIED WARRANTIES
Except as set forth in item 1 above, all other expressed or implied
warranties, including those of fitness for any particular purpose and
merchantability, are hereby disclaimed.
Some states do not allow limitations on warranties, so the above limitation
may not apply to you.
5.   EXCLUSIONS
This warranty does not cover the following:
 Installation
 Battery Pack, excluding workmanship
 Finishes
 Defects resulting from installation
 Any damage due to accident, resulting from inaccurate satellite
  transmissions. Inaccurate transmissions can occur due to changes
  in the position, health or geometry of a satellite.
 Any damage due to shipping, misuse, negligence or tampering or
  improper use.
 Servicing performed or attempted by anyone other than an
  authorized Magellan Service Center representative.
 Modifications to the receiver which may be required due to any
  change in the Global Positioning System (GPS). [Note: All
  Magellan GPS receivers use GPS to obtain position, velocity and
  time information. GPS is operated by the U.S. Government, which
  is solely responsible for its accuracy and maintenance. Certain
  conditions can cause inaccuracies which could require modifications
  to the receiver. Examples of such conditions include but are not
  limited to changes in the GPS transmission. Such modifications are
  not covered by this warranty].
 Damage resulting from improper external connections.
Opening of this product by anyone other than an Authorized
Magellan Service Center representative will void this warranty.

6.   EXCLUSION OF INCIDENTAL OR CONSEQUENTIAL
     DAMAGES
Magellan Systems Corporation shall not be liable to purchaser or any
other person for any incidental, special, indirect or consequential
damages whatsoever, including but not limited to lost profits, damages
resulting from delay or loss of use, loss of or damages arising out of
the use or inability to use this product, or breach of this warranty even
though caused by negligence or other fault. In no event will Magellan
Systems Corporation be responsible for such damages, even if
Magellan Systems Corporation has been advised of the possibility of
such damages.
Some states do not allow the exclusion or limitation of incidental or
consequential damages, so the above limitation or exclusion may not
apply to you.

7.   MERGER
This written warranty is the complete, final and exclusive agreement
between Magellan Corporation and the purchaser with respect to the
quality of performance of all the goods and any and all warranties and
representations. This warranty sets forth all of Magellan
Corporations's responsibilities regarding this product.
This warranty gives you specific legal rights and you may also have
other rights which vary from state to state.

8.   FOR PURCHASERS OUTSIDE OF THE UNITED STATES
This warranty gives you specific rights. You may have other
rights which vary from province to province and certain
limitations contained in this limited warranty may not apply to
you.
If you purchased this product outside of the United States, this limited
warranty is governed by the laws of the State of California and shall
benefit Magellan Corporation, its successors and assigns.
For further information concerning this limited warranty please call or
write:
                  Magellan Corporation
                  960 Overland Court
                  San Dimas, California 91773
                  Phone: (909) 394-5000
                  FAX: (909) 394-7050
                  e-mail: wireless@mgln.com
     960 Overland Court, San Dimas, CA 91773
                  (909)394-5000

22-60104-000


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