Thursday, October17, 2019

Datamarine Link5000


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Table of Contents                 Notice                                              ;       Introduction                             nect to the transducers and 12 volt
                                                                                                                                       power. The transducer information is
Introduction                      Modern navigation electronics are                           Datamarine is pleased you have           converted by the main unit to Link
                                  remarkably accurate and trouble
                                  free. Nevertheless, information from                /       chosen the Link 5000 System for          format and is transmitted on the Link
System Configuration                                                                          your boat. We know you will be           network. Additionally, the 5100 main
                                  your Link equipment or from any                    $ii.     satisfied with your decision.            unit has a liquid crystal display and a
Installation                      other navigation aid should not be                                The 5000 is part of the techni-    keyboard for display selection.
   Main Unit                      relied upon exclusively. Instruments                        cally advanced Link family, which             The 550 remote is the most
   Transducers                    can fail due to interference, faulty               uu       allows it to be networked to any         common remote display for the Link
   550 Remote                     transducers, incorrect installation,                        other Link instrument. Powerful and      5000 System, although other Link
                                  instrument malfunction and operator                         flexible systems are easily config-      remotes may be used instead of (or
Operation                          error. Always analyze Link informa-
   Depth                                                                                      ured for your particular requirements.   in addition to) the 550. The 550
                                  tion and cross check with all other                               These state of the art instru-     receives wind, speed, and depth
   Speed/ Log                      available navigational techniques.
   Wind                                                                                       ments use only the finest materials      information via the network. It per-
                                  The prudent navigator will never use                        and are manufactured in the United       forms calculations and displays the
   Compass                         a single navigational aid exclusively.
   Loran                                                                                      States by people who want to pro-        results at the remote location.
   Remote                                                                                     duce a quality product. To serve you           The significant features of the
                                                                                              equally well after your purchase, we     5000 system are listed below.
 Warranty Information
                                                                                              maintain a complete service record
                                                                                              on each instrument, and we ask that      Model 5100 NAV Station Main Unit
                                                                                              you help us serve you by promptly        Depth Functions:
                                                                                              "egistering your Warranty.               - 2.5 feet - 399 feet, or equivalent in
                                                                                            3       TOrealize the full potential of
                                                                                              your Link instruments, please take a
                                                                                                                                         meters or fathoms, selectable by
                                                                                                                                         pushbutton,tenths below 20 feet,
                                                                                              few minutes to read through the            meters, or fathoms.
                                                                                              manual before installing your units.     - 39 position alarm (main unit alarm
                                                                                                                                         setting independent of remote
                                                                                              Features                                 - Depth offset 4 feet above to 8 feet
                                                                                                                                         below the transducer
                                                                                              The Link 5000 System is a network        - Remote alarm output 12VDC .05
                                                                                              of advanced microcomputer based            amps.
                                                                                              instruments designed for moderate        - Alarm mute control silences main
                                                                                              size racing and cruising sailboats as      unit and all other units on the
                                                                                              well as fine motor yachts. It inte-        network
                                                                                              grates the important functions of
                                                                                              speed, depth, wind, compass head-        Speed Functions:
                                                                                              ing and loran data into a single main    - 0.00 to 35.0 knots (or 40 MPH)
                                                                                              unit. This main unit (model 5000 or        actual speed with trend indicators
                                                                                              5100) can communicate via the Link       - Average speed (resettable)
                                                                                              network to any of several dozen dif-     - Velocity-made-good (VMG)
                                                                                              ferent Link instruments. This makes        upwind or downwind
                                                                                              the system flexible and expandable.      - Logs
                                                                                                    The "Main Unit", either the          a. 0.00 to 2,000 miles resettable
                                                                                              5000 or 5100, serves as the trans-         b. 0.0 to 10,000 miles accumulating
                                                                                              ducer interface point. Connections       - Timer count up to 20 hours
                                   All rights rese~ed.No part of this work                    are made here to the wind, speed,          (00:OO to 19:59, Min:Sec)
                                   covered by the copyrights hereon may be                    and depth transducers as well as           (00:20 to 1959, Hrs:Min)
                                   reproduced or copied in any form or by any
                                                                                              the primary connection to the elec-      - Sat Nav output - 200 Pulses per
                                   means - graphic, electronic, or mechanical,                                                           Mile relay switch closure 50%
                                   including photocopying, recording, taping, or
                                   information and retrieval systems - without :
                                                                                                nic compass, loran, and Sat Nav.
                                                                                                e 5000 and 5100 are termed
                                                                                                2                                        duty cycle
 Odjjyright 1985                   written permission of Datamarine lnternationaj,             Main Units" since a system must         - Four levels of damping to smo:;!~
 Datarnarine International.Inc.    Inc.
                                                                                              contain at least one of these to con-      speed display
Wind Functions:
- Apparent wind speed and angle
                                       Model 5000 Standard Main Unit
                                       - Specifications identical to 5100
- True wind speed and angle              main unit without LCD display                     Configuration
- Four levels of damping to smooth     - 0.0 to 10,000 miles accumulating
  wind speed and angle display          log                                     ,
Compass Functions:                     Model 550 Remote Display                 T;                        MASTHEAD SENSOR
- Displays boat heading in degrees     ~~~~h~         ~       ~      ~      ~       i      ~      ~       ~    ,  .
  magnetic                             - 2.5 feet to 999 feet or equivalent
- Displays true wind direction in        in meters or fathoms                   w                                                                                5 5 0 REMOTE
  degrees relative to magnetic north   - 46 position alarm (independent of                                                          LINK NETWORI<
- Transmits heading onto Link net-       main unit alarm)
  work for use by any other Link       - Alarm mute control (silences
  instruments.                           remote and all other units on the
Loran Functions:                         network)                                                                                         I
- Interfacesto Loran-C receivers
                                                                                                                                                                > SAT NAV         OUTPUT
                                       Speed Functions:                                                                      5 0 0 0 OR 5100
  with the "CDX output                                                                                                   >                                                    2 0 0 PPM
                                       - 0.00 to 35.0 knots (or 40.0 MPH)                                                        M A I N UNIT
- Transmits Loran data onto Link       - Speed trend indicators                                                                                                       REMOTE ALARM
  network                              - Average speed (resettable and                                                       A        A         A Y )
                                         independent of main unit)                                                                                               LORAN
Transducers, Interfaces:
                                       - Velocity-Made-Good (VMG)
                                                                                                                                                                 DATA INPUT
- Depth - 205Khz, model DX-111,
  nylon low profile                      upwind or downwind
- Speed - model SX-115, nylon low      - Timer 0 to 20 hours (resettable
                                         and independent of main unit)                                            DEPTH
                                       - Trip log to 2,000 miles (resettable
- Wind - model WX-175 with 80' of                                                                                                   SPEED COMPASS
  interconnecting cable                  and independent of main unit)                                                              XDCR   INPUT
- Compass - (Optional) model           - 4 position electronic damping
  L500, N+l format                     Wind Functions:                                                                                                                                     Figure I
- Compatible with existing             - Analog display of apparent wind
   CorinthianILX-360 transducers          anale
Power:                                 - ~ i G t adisplay
                                                   l      of apparent wind                 The 5000 (or 5100) main unit acts            information. Except for receiving its
- 10-16VDC                               speed                                             as a signal conditioner for the speed,       data from the main unit, the remote
   0.2 amp day                         - Four position electronic damping                  depth, wind, and compass trans-              works quite independently from the
   0.4 amp night                       Power (derived from Link network):                  ducers and the loran data. It con-           main. Among other things, it calcu-
- Reverse and overvoltage pro-         - 0.1 amp day                                       verts this "Raw Data" to Link format         lates its own elapsed time, log
   tected to rt20 VDC                                                                      information and transmits it onto the        accumulations, average speeds, and
                                       - 0.2 amp maximum night
- Power off continuous memory of                                                                                                        depth alarm settings.
                                       - Power off continuous memory of                    Link network for possible use by any
   alarm setting, depth units, damp-     alarm setting, depth units, damp-      *          other Link instrument.                              By making the main and
   ing level, average speed, and log     ing level, average speed, and log                        In addition, the Link 5100 main       remotes largely independent, the two
Lighting:                                                                                   unit displays both primary data (boat       can find a wide variety of different
- Seven levels of intensity
                                        - Seven levels of intensity                        speed, apparent wind, depth) as well         uses. The navigator, for example,
   selectable                              selectable                                       as computed functions which are             can log the day's run on the main
Link Network Outputs:                                                                       derived from the primary data (true         unit while the helmsman can use the
- Speed, trend, log, timer, depth,                                                          wind, VMG, average speeds, etc.).           cockpit remote log for buoy to buoy
   depth offset, apparent wind speed                                                              The main unit also supplies            navigation. Or, the helmsman can
   and angle, true wind speed and                                                           power to the Link network to any            enter a depth alarm setting, in feet if
   angle, VMG, damping, compass                                                             number of Link remote instruments.          he likes, on the remote while the
   heading, cross-track error, dis-                                                               Each remote instrument con-            navigator can set a different setting,
   tance to waypoint, lighting                                                          $/ +sins its own computer which uses             in fathoms or meters, on the main
- , BNC connector
                                                                                        & d e information on the network to              unit.
- 'ESmpatible with all Link products                                                        calculate and display additional                   The instruments cooperate  br.,.

                                                                                                                                         do not interfere with each other.
                            Installation                                                                                - RecessedMounting - To recess
                                                                                                                           the 5000151 00 it is first necessary
                            Main Unit Mounting - The Link                                                                  to attach the flush mounting
                            5000 and 5100 are designed to-be                                                               brackets to the instrument.
                            mounted in either of two ways:                                                                 Unscrew the four rear case
                                                                                                                   $a      screws a few turns each. It is not
                                                                                                                           necessary to remove them, just
                                                                                                                           loosen them to separate the bezel
                                                                                                                   a       from the housing and insert the
                                                                                                                           two molded flush mounting
                                                                                                                           brackets. When the brackets are
                                                                                                                           correctly positioned, tighten the
                                                                                                                   1       four screws on the rear panel to
                                                                                                                           securely clamp the brackets in
                                                                                                                   I       place. Torque the screws lightly to
                                                                                                                           just mate the bezel, brackets, and
                                                                                                                   I       housing.
                                                                                                                   1       bulkhead
                                                                                                                                 Cut aorhole
                                                                                                                                             in the
                                                                                                                                                       the tem-
                                                                                                                           plate provided. Be sure that there
                                                                                                                           is sufficient depth behind the

                                                                                                                       0   panel for the instrument plus the
                                                                                                                           connectors and cable loops. The
   a. Recessed into a nav station or                     b. Free standing, surface mounted,                                instrument should slide into the
   igstrument panel,                                     or hanging from an overhead                                       rectangular hole and be fastened
                                                         support.                                                          at the four corners of the flush
                                                                                                                           mounting bracket with the screws                      Figure 3
Figure 2                                                                                                                                                                         Figure 4

                             - Convenient Location - In any              weather damage, yet a good
                               mounting arrangement, the pri-            installation will add years to its life
                               mary consideration is easy view-          by protecting it against the direct
                               ing and convenient operation of           impact of saltwater, rain, and the
                               the keyboard. The unit has an             intense U.V. of the sun.
                               especially wide viewing angle dis-             The front panel is quite
                               play, but the installation will be        waterproof, but the rear panel and        =
                               most satisfying if the keyboard           connections are not and should
                               and display are directly facing the       be protected from rain, spray and
                               operator.                                 wet environments. Water damage
                                    In the case of the non-              to the circuit boards can be
                               display 5000 main unit the most           severe and can result in a voided
                               convenient location may be inside         warranty (see Warranty Statement).
                               a locker or other dry available                The 5000151 00 generates
                               space.                                    very little heat, so no considera-
                             - Weather Protection - The unit is          tion need be given to cooling or
                               very well protected against               ventilation.

                                                                                                                                                                  L-Y 1 0

                                                                                                                               L-313                                        --    -   -
                                                                   half and the plate. Only turn the       I        Main Unit Wiring                           - Remote Alarm    - The depth
                                                                                                                                                                 remote alarm terminals are avail-
                                                                   --         on a few turns. Slide this
                                                                   assembly into the slot in the bot-               All wiring connections to the Link           able to drive an additional buzzer.
                                                                   tom of the housing so the housing                5000 system are made at the main             The output is + I 2VDC and will
                                                                   is captured between the mounting                 unit rear panel. Erisure that power to       drive up to 50 milliamps. This is
                                                                   plate and the hinge.                    *        the unit is turned off until all connec-     sufficient to power "Sonalert" type
                                                                          The hinge may be mounted                  tions are made.                              horns, but larger buzzers may
                                                                   with the hinge point either on the               - Transducer Cables - Connect                require a relay for more current or

                                                                   front of the instrument or to the       .
                                                                                                           I           the speed, depth and wind trans-          different voltages.
    ,                                                               rear, depending on the mounting                    ducer cables. The depth and                     Datamarine's A-1 57 alarm
                                                                   angle desired. See Figure 5.                        speed cables are simple plug on           panel would be a good choice if a

                                                                          If a hanging overhead mount is
                                                                   best, the instrument housing may
                                                                    be rotated to position the hinge
                                                                    mounting slots on the top of the
                                                                                                           !           connectors. Be sure the speed
                                                                                                                       transducer cable connects to the
                                                                                                                       speed jack, not to the Link net-
                                                                                                                       work jack. The BNC plugs are
                                                                                                                                                                 remotely located alarm is desired.
                                                                                                                                                               - Sat Nav Output - This is a SPST
                                                                                                                                                                 relay contact closure which allows
                                                                                                                                                                 interfacing to nearly all current
                                                                    unit as shown in Figure 6.                         identical so a mistake can easily         satellite navigation receivers. In
                                                                    Remove the four screws on the                      be made. It would be a good idea          most cases, a voltage available at
                                                                    rear panel. Remove the rear panel                  to label the end of each cable to         the sat nav receiver should be run
                                                                    and unplug the two cable connec-                   avoid future confusion if the unit is     to terminal 1, terminal 2 should be
                 Figure 5                                           tors. Slide the housing away from                  ever removed for service or sea-          returned to the input on the
                                                                    the front bezel and electronic         I
                                                                                                                       sonal storage.                            receiver. The receiver should be
                            - Free Standing Hinge Mounting -        assembly, rotate 180" and slide it                       The wind cable should be

I                             To surface mount the main unit,
                              the optional hinge mounting
                                                                     back on. Reconnect the two
                                                                     plugs, taking care to observe cor-
                                                                                                               0       connected to the screw terminals
                                                                                                                       being careful to observe the cor-
                                                                                                                                                                 set to 200 pulses per mile. This
                                                                                                                                                                 may be in nautical or statute
                                                                                                                                                                 miles. See the "SpeedlLog" sec-
I                             bracket may (L-339) be attached        rect orientation. Replace the rear                rect color coding. The wire shield        tion beginning on page 34. If in
                              to the instrument housing. First       panel and four screws. Be careful                 should be connected to the                doubt, the sat nav manufacturer
                              attach either half of the hinge to     not to overstress any cables and                  "SHLD" terminal taking care to            or Datamarine can help with spe-
                              the support plate with the three       not to pinch any wires between                    prevent stray wire strands from           cific interface questions.
                              screws provided. Remember to           the rear panel and housing.                       shorting out against any other
                                                                                                                       point.                                  - Link Network Connection -
                              slip the nylon spacer over the         Torque the screws lightly to just
                                                                     mate the housing and bezel.                                                                 Connection to the Link network is
                              center screw between the hinge                                                         - Compass and Loran - The
I                                                                                                                                                                made with the BNC connector
                                                                                                                       compass input is "N+1 " Format.           cable supplied. If possible, check
                                                                                                                       The model L-500 Link compass              this cable with an ohmmeter
                                                                                                                       sensor is connected with the red
                                                                                                                       wire to '+ Power', the black wire to
                                                                                                                        'compass -' and the white wire to
                                                                                                                                                                 before connecting to Link instru-
                                                                                                                                                                 ments at either end. Resistance
                                                                                                                                                                 between the connector center pin
                                                                                                                        'compass +'. The same compass
                                                                                                                        sensor can also be used with
                                                                                                                                                                 and the outer shell should be w
                                                                                                                                                                 (infinity). A low resistance indi-
    1                                                                                                                   compatible sat nav receivers             cates a short circuit, probably at
                                                                                                                        andlor autopilots.                       the connector, which should be
                                                                                                                             The loran input is compatible       corrected.
                                                                                                                       with any approved loran which
                                                                                                                                                               - Power Connection - To avoid
                                                                                                                        has a "CDX output drive. If in
                                                                                                                       doubt, contact Datamarine's Cus-          accidental short circuits and other
                                                                                                                       tomer Service Department to               miswiring problems, the power
         I                                                                                                              check compatibility with your par-       connection should not be made
        II                                                                                                             ticular loran receiver.                   until all other connections are
                                                                                                                            The Loran input is connected         made and checked.

                                                                                                               ,,      with the red wire to 'loran +' and
                                                                                                                       the black wire to 'loran -I.

                                                                                                                             Again, labeling these similar
                                                                                                                                                                       The 12 volt d.c. power for the
                                                                                                                                                                 instrument should be connected
                                                                                                                                                                 using the power cord provided.
                                                                                                                                                                 connect RED to POS., BLACK to
             I                                                                                                         wires will prevent future confusion.
                      NEG. The Link main unit is pro-
                      tected against polarity reversal.
                                                              Transducer                                           - Route the cable away from
                                                                                                                 sources of electrical noise such as
                                                                                                                                                       existing Datamarine "Corinthian"
                             NOTE: Obtain the 12 volt d.c.    Installation                                       generator and ignition wires. Do            The 5000 is not designed to
                      power and ground (both positive                                                            not shorten the transducer cable      operate on any transducers other
                      and negative side) as directly from            Depth Transducer - The key                 as this will detune the transducer     than those supplied for it by
                      the battery as possible. Avoid          to proper operation of the depth          @        and impair the performance of the     Datamarine. Any attempt to tune or
                      power circuits which share loads        sounder is the correct installation               depth sounder. Coil up the excess      match to another transducer is at
                      with ignition, alternators, radio       and maintenance of the transducer.                cable and store in a convenient,       the owner's risk.
                      transmitters, radar sets, winches,      The general and detailed recom-           w       low noise location. If a longer              The 5000 is designed only for
                      solenoids, starter motors, or motor     mendations that follow should guide               cable is required, refer to section    operation on 12 volt battery systems.
                      driven accessories. Excessive           the placement and installation of the             "Longer Cable."                              Should the unit fail to work
                      electrical noise associated with        transducer.                                     - Keep the transducer face clean         properly, check power wiring and
                      these devices may prevent the                  Datamarine recommends                      and do not allow buildup of lay-       voltage, transducer connections and
                      5000 depth sounder from operat-         against inside of the hull installations          ers of bottom paint. Gently            transducer condition. Many reported
                                                              and "water boxes". Reliable opera-
                      ing at maximum depth and cause
                       random numbers to be displayed.        tion and full performance specifica-
                                                              tions cannot be assured unlessthe
                                                                                                                remove old paint before applying
                                                                                                                fresh antifouling paint. Do not use
                                                                                                                                                       cases of failure or malfunction are
                                                                                                                                                       traced ultimately to water box instal-
                             Proper wiring practice                                                             paint remover or other solvents.       lations, fouled transducers, heavily
                       requires a correct size fuse or cir-
                      cuit breaker in line with the
                       instrument, as close as possible to
                      the source of power. For your pro-
                      tection, ensure that a proper cir-
                                                              transducer face is in direct contact
                                                              with water under the hull.
                                                              General Guidelines -
                                                                     CAUTION - A bronze trans-
                                                              ducer must not be installed directly
                                                                                                                Never strike the transducer face a
                                                                                                                sharp blow, as damage to the
                                                                                                                transducer and/or depth sounder
                                                                                                                could result.
                                                                                                                   The speed, depth and wind
                                                                                                                                                       painted transducers and spliced
                                                                                                                                                       transducer cables. DO NOT
                                                                                                                                                       ATTEMPT TO TUNE OR ADJUST
                                                                                                                                                       YOUR DEPTH SOUNDER. SEEK
                                                                                                                                                       SERVICE OR ADVICE FROM YOUR
                       cuit breaker or fuse is installed.
                       A 3 or 5 amp fuse or breaker is
                                                              onto a steel or aluminum hull. Spe-
                                                              cia1precautions are needed to avoid
                                                                                                   Q       6 -
                                                                                                           L,ransducers are fully compatible with
                                                                                                            ,                                          DATAMARINE DEALER OR THE

                       suggested. The rear panel of the        damage due to electrolysis of dis-
                       main unit contains a push to reset     similar metals. (Please request tech-
                       circuit breaker which should pro-      nical bulletin #10 from Datamarine
                       tect the instrument in the event of     for details).
                                                               - Provide for continuous contact of
                       internal malfunction. However,
                       protection of the boat's wiring and        the transducer face with the water
                       switch panels can only be assured          under all normal operating attitudes
                       with a circuit breaker or fuse as          of the boat.
                       close to the source of power as         - On sailboats the transducer
                        possible.                                 should be oriented to within 10
                             Note that your instrument is         degrees of vertical for best accu-
                       designed and warranted for oper-           racy and performance.
                                                               - A location approximately 2/3 aft is
                       ation on 12 volt battery systems
                       only. Improper voltage can                 typically suitable. Avoid locations
                       seriously damage the instrument            immediately downstream of thru-        E

                       and will void the warranty.                hull fittings, struts, etc. Avoid turbu-
                             If additional cable is neces-        lent areas. On fast planing hulls,
                                                                  mount well aft and close to the           a                                                                                     Figure 7
                       sary for the power connection, 16
                       AWG wire (or larger) is suggested          centerline to avoid the planing             1 DX-111          I                               I   /                                    I
                        up to lo', 14 AWG up to 25'.              wake.
                             Separate power connections        - Mount the transducer as deep as
                        must be made to any loran or sat           possible to avoid the effects of
                        nav receiver interfaced to the            shallow turbulence. The trans-
2.I L.                  5000.                                     ducer should not be the lowest
            ;. .
               :','                                                point in the event the vessel runs
                                                                  aground.                                P\ q6-1                    BEST LOCATION
                                                                                                                                      CROSS SECTION OF          !   HULL
                                                                                                                                                                           STRAKES ti AIR SLOT&          !
      Sometimes when first launched,         required. High quality conventional              Flush Mount Transducer
the transducer face will not be fully        paint will work well.                       Installation - DX-111, 112, 130 -
wetted due to paint film, oily surface            Datamarine ships the flush             For the installation of the flush
or a microscopic film of air. The            mounting DX-111 transducer with             mounted transducers, the location
sounder will miss continuously until         the 5000. It is an excellent trans-         should be chosen such that the
the boat has run a short distance.           ducer which is compatible with most         deadrise angle is minimum (see Fig-
      Anti-Fouling Paint - We                installation requirements. However,         ure 1O), normally amidships at max-
recommend a single, thin coat of             other transducers are available and         imum beam.
anti-fouling paint on the transducer         might be preferred in some
face to prevent fouling. It should be        situations.                                       If the deadrise angle is greater
recoated each time the boat bottom                                                       than 15 degrees, the depthsounder
is painted. First, gently sand off any        - DX-112 - Similar to DX-111               will not operate to full depth when
 previous paint such that only one               except bronze construction.             the yacht is heeled down on the
fresh coat is on the transducer face.                                                    opposite side. In such cases, two
 Paint buildup will reduce perfor-            - DX-130 - Similar to DX-112               transducers can be installed, one on
 mance, as will a fouled transducer.             except chamfered for flush              each side with a gravity operated
 Special "transducer" paint is not               mounting into countersunk hole.         switch (Model A-106) to select the                                                         Figure 10
                                                                                         leeward transducer ~utomatically.         Next, tighten the nut firmly. The
                                                                                               To install the transducer, care-    cable is then routed to the depth-
                                                                                    i    fully choose the best location in the     sounder to complete the installation.
                                                                                         hull. Bore a hole 2-1 I 16" in diameter         The DX-130 transducer installa-
                                                                                               bed the transducer flange and       tion is similar except that the hull .
                                                                                                   area onto the hull using one    must be countersunk to accomo-
                                                                                          of the high grade marine bedding         date the transducer (90" included
                                                                                          compounds. It is recommended that        angle). Datamarine supplies a spe-
                                                                                          a block of 3  ( or 1/2)) plywood be      cia1 tool for this countersinking oper-
                                                             ross sectton of hull

                                                                                    //                /8
                                                                                         drilled 2-1 I 16" in diameter and
                                                                                          bedded between the hull and nut
                                                                                                                                   ation. See Figure 9.
                                                                                                                                         In case of cored hulls (balsa,
                                                                                    '     (see Figure 9). This acts as a locking
                                                                                          device and also provides a com-
                                                                                                                                   foam, etc.), it is important that the
                                                                                                                                   countersink transducer DX-130 be

                                                                                    !     pliant interface to accommodate
                                                                                          variations in the hull inner surface.
                                                                                                                                    properly backed up with a rigid rein-
                                                                                                                                   forcing plate. See Figure I   I.Cut
                                                                                                                                                                                         I I
                                         thru hull fittlng
Figure 8                                                                             1

                                                                                                                                                                   plywood backing block


 Figure 9
            away the inner skin and the core                The transducer should be                  Transom Mounting                                        centerline as possible while avoid-
            material to accomodate the reinforc-      aimed downward to within 10                     - DX-200 - Proper mounting of the                       ing the general engine area. On a
            ing plate while preserving the outer      degrees of vertical.                              DX-200 transducer is extremely                        twin engine installation,the trans-
            hull skin. Pierce the outer skin with a         Once the location is selected               important to the eventual perform-                    ducer may be located between
            pilot hole for later boring location.     following the guidelines, determine               ance of the sounder. Since the                        the engines. Avoid locating the
             Epoxy bond the reinforcing plate to      the local deadrise angle. Saw the                 pulse from the transducer will not                    transducer behind air slots in the
            the outer skin and the surrounding        fairing block in half lengthwise at this          sound through air, the transducer                     boat hull or in line with drains or
            core material. Lay up fiberglass          angle so that the transducer face is              should be located where aeration                      suction-type self-bailers.
            clothlmat over and around the rein-       aimed directly downward. Cut the -                is least likely to occur. Keep the                          Mount the transducer, as
            forcing plate. After resin cure bore a    block for minimum projection into the       ,     transducer as close to the boat                       shown in Figure 15, so that the flat
            2-1 I 16 hole from outside the hull       water for least drag.
            centered on the pilot hole. Counter-
            sink, bed, and install a plywood
                                                            Apply a good quality under-           1                                                                                                                  Figure 13
                                                      water bedding compound on the               1
            backing block as described earlier.       fairing block, leveling block and
            ***** It is recommended that the          transducer stem. Install on hull.
            plywood backing block be cut no                 DO NOT OVERTIGHTEN. A
            larger than the reinforcing plate to      torque of 20 ft. Ibs. is recommended.
            avoid "jack-out" stresses on the                Recessed Mounting - On
            reinforcement.                            some boats, a recessed mounting
                  Faired Transducer Installation       may be preferred for low drag and
            - DX-1 04 - Stem type bronze              minimum projection. (See Figure 13).
               transducer for installation with       Remember, do not install the trans-
               molded fairing block or recessed
               into stem of boat. Best for use
                                                      ducer at an angle greater than 10
                                                                                             @.   0
               where deadrise angles exceed                                                       I
               10". See Figure 12.

                                                                                                                                                       section thru
                                                                                                                                                       ull centerline
                                                                                                                                                        side view
Fiaure 12
                                                                                                                 eimxy   1
                                                                                                             fairing filler
                                                                                                                              1transducer recessed
                                                                                                                                                                                              f o r e l a f t view

                                                                                                                              in counterbored cavity

                                                                                                                                                                                                                     Figure 15

                                                                                                                                                CABLE TO DISPLAY

                                   deadrise angle
                                                                                                                                                        TRANSDUCER ASSEMB

                    F R O M VlEW

                                                                FRONT ViEW

                                                                                                                                              1 AL
                                                                                                                                                                 t     2 D ~ ~ ~      l   ~     ~     ~     ~
                                                                                                                                                                     PRESSURE ANGLE
                                                                                                      1    SIDE VIEW                                                                      REAR VIEW
  face is flush with the boat hull on          Now an electrical check of the               Longer Cable                               Speed Transducer
  the inboard side of the transducer     transducer may be in order. If water
  face and has a positive trim angle     has gotten into the crystal area of                - Long Cable Installation - The            Installation
  of a few degrees to provide a flow     the transducer, it will generally be                 5000 has been specially tuned to
                                                                                              operate with the transducer and          The most important aspect of instal-
  of clean (unaerated)water over         detected by a resistance check.                                                               lation is the proper choice of location
                                                                                       p.     cable supplied with it. In case the
  the face of the transducer. This             Connect either lead of an                                                               of the thru-hull impeller transducer in
  may require some compromise            ohmmeter to the center pin of the                    installation requires a cable longer
                                                                                              than the standard 30', extension         your boat. Operation and accuracy
  since boat attitude will vary          transducer connector. Connect the                                                             of the instrument are largely deter-
  according to boat speed.               other lead to the outer contact of the        1      cables can be used.
                                                                                                                                       mined by the location of the impeller
        Upon trial and error, the most   connector.                                                Datamarine can supply the
                                                                                              A-1 13 10' cable extenders which         with respect to hull flow characteris-
  effective tilt angle of the trans-           The transducer normally                                                                 tics. The following is some detail
  ducer will be found.                   causes an ohmmeter to read "max-                     have connectors allowing multiple
                                                                                                                                       concerning the considerations
                                         imum" resistance (an open circuit).           I      extenders to be strung
                                         Anything less than that, suggests                    end-to-end.
Depth Transducer                         water damage. Again, a check of the                       However, the instrument will               General Considerations -
                                                                                                                                              CAUTION - A bronze trans-
                                                                                              have to be modified to provide for
Troubleshooting                          cabling and connector may locate
                                         the problem. If it doesn't, and the           I      the extra cable capacitance.             ducer must not be installed directly
                                                                                                                                       onto a steel or aluminum hull. Spe-
Visually checking the transducer,         resistance remains, consider the
                                                                                                                                       cial precautions are needed to avoid
cable and connector may not be           transducer defective and in need of           1                                  Figure 7 6
                                                                                                                                       damage due to electrolysis of dis-
enough to determine the trans-            replacement.
ducer's quality. One convincing                Transducer Cabling - The
                                          Link depthsounder uses tranducers
                                                                                                                                       similar metals. (Please request tech-
                                                                                                                                       nical bulletin #10 from Datamarine
method of determining a transduc-                                                                                                      for details).
er's quality is to hang a second          supplied by Datamarine. They have       ''   1
                                                                                                                                              A hull moving through water will
transducer over the edge and see if       a standard 30' of cable which should
                                                                                                                                       create a boundary layer of water
the depthsounder's performance            not be shortened. (Lengthing is
                                                                                                                                       immediately adjacent to the hull
improves. If the performance              covered in the next section.)                                                                which is not still water, but is moving
improves, consider the results of this         Other Transducers - Other                                                               along with the hull because of fric-
test to indicate that the solution to    transducers in the 205 - 210 Khz
                                                                                                                                       tional drag. For this reason, it is
your problem is transducer related.       range may work with the Link depth-
                                                                                                                                       inaccurate to put a tiny paddle wheel
Marine growth, excess bottom paint        sounder. Datamarine cannot be held
                                                                                                                                       impeller a short distance through the
or water flow may be the reasons for      responsible for performance or satis-                                                        hull at any location and expect to
the apparent failure. A visual inspec-   factory operation of your instrument                                                          measure the exact speed of the hull
tion of the transducer face and the       when other transducers are used,                                                             through the water. One must reckon
surrounding hull area may reveal the      and we offer no guarantee of                 I
                                                                                                    Remove the rear panel (4           with the boundary layer of moving
source of the problem. Also check-        success.                                                                                     water.
                                                                                              screws), disconnect the two con-
 ing the cabling and connector for                                                            nectors and withdraw the front                  The boundary layei is defined
any physical and/or electrical prob-                                                          bezel and electronic assembly            as the thickness of water which is
 lems may be helpful.                                                                  C1

                                                                                              from the housing. Locate capaci-         pulled along with the hull due to form
                                                                                              tors C6 and C7 near the center of        or frictional drag. Datamarine
                                                                                              the top circuit board. See Figure 16.    research tells us that the boundary
                                                                                              Carefully clip out one or both           layer effects are related to velocity
                                                                                              according to the number of extra         (boat speed), waterline length or dis-
                                                                                              cable extenders used:                    tance aft of the bow, and the surface
                                                                                               Number of 10'         Remove            condition of the hull (foul or fair), and
                                                                                              Extensions                               angle of the keel.
                                                                                              1 (40' total)        C7 only                    Of these factors, distance aft of
                                                                                              2 (50' total)        C7 only             the bow is by far the most important,
                                                                                              3 (60' total)        C6 and C7           i.e. the further aft, the thicker the
                                                                                              4 (70' total)        C6 and C7           boundary layer. In fact, water flow far
                                                                                               No more than 4 cable extensions         aft is likely to be turbulent, called
                                                                                               should be used.                         "separated flow" by experts. Naturally,
hull shape and steps or strakes are                 Naturally, you should be able to
contributors to flow characteristics,        0bse~e      the installed thru-hull fitting                                                            -   RECOMMENDED LOCATION

but generally, flow aft of midships is       and prudence dictates that it should                                                                         (either side)
                                                                                                                                                        a. Approximately '/3 aft
unreliable for speed measuring               be regularly inspected along with all                                                                         close .lo centerline
                                             the other thru-hull fittings installed in                                                                  b. Forward of keel
purposes.                                                                                                                                               c. Retaining pin aligned
       On fast, deep-vee, planing hulls,     your yacht.
the forward vee sections push water                 It is a good idea to tie the
aside and the resultant flow is not          dummy plug onto the transducer
truly indicative of the forward prog-        with a short lanyard. Whenever the
ress of the hull through the water.          transducer is removed for inspection
Thus, the recommended transducer             or cleaning, the dummy plug will be
location for heavy planing hulls is'dif-     immediately at hand. No need to
ferent than that for displacement            search through lockers or drawers.
hulls.                                              Mounting Recommendations
       Surface conditions of the hull        - Select a location as far forward
will modify boundary layer effects.          and as deep as you can which:                                                                           +BEST

This is difficult to measure exactly,               Keeps the transducer submerged                                                                  LOCATIONS

however, we can predict that a mid-          during all normal boat attitudes and
ships mounted transducer may                  motions, and heel angles.
 measure as much as 5% low when                     Is freely accessible and visible              Figure 7 7- Speed Transducer Recommendation - Displacement Hulls
the hull is badly fouled or rough as         from within the yacht. See Figure 17
compared to the original calibration         or 18.                                        Qf-J
with a smooth hull.                                 A centerline location, if possible,
       Boundary layer effects in the         is best.
 normal ranges of yacht speed are                   The standard speed transducer                                                                                                          RECOMMENDED LOCATION
 directly proportional to speed. This         shipped with the 5000 is the SX-115.
 means that once installed, you can           Other transducers are available as                                        Impeller Transducer                                                b. Inboard of first strake
                                              well.                                                                                                                                        c. Retaining pin aligned
 calibrate at one speed and thereafter                                                                                   should be forward
                                                                                                                         of intakes. shafts
 it should be accurate at all speeds of       SX-115                                                                       struts & props
 interest.                                    Fiberglass reinforced nylon flange                                     7-
       Accessibility - Accessibility is       projects only 3/,,"
 a major consideration in selecting a         SX-125
 hull location for the transducer. This       Bronze version of SX-115
 is vitally important. Be certain to          SX-135
 select a location which allows free          Flush version of SX-125 for counter-
 access to the transducer from within        sunk hole installation
 the yacht. From time to time, you           sx-201
 may want to remove the impeller for         Transom mount transducer for small              Q

 inspection or cleaning. This is a sim-      fast powerboats
  ple and safe operation when the
 yacht is in the water if the fittings are

  easily reached and if space allows
  hand and arm movements. Each
 time the impeller or plug is removed,
 you will take on a quart or two of                                                                                                                    RECOMMENDED
                                                                                                                                                                                            AFT OF ENTERING
                                                                                                                                                                                             BOW SECTIONS
 water. Life is more pleasant if this                                                                                                         (Sufficiently aft to be in maximum
                                                                                                                                              beam section, forward of engines)
  water can drain directly to the bilges
 for pumping.
                                                                                                        18 - Speed Transducer Recommendation - Planing Hulls
                                                                                                                                   Installing the Transom Mount
                                          Installation of the Thru-Hull             Now permanently install the              Transducer - If your unit is a tran-
                                   Fitting -To install the thru-hull fit-    thru-hull fitting, using a small amount         som mount speedometer, it will be
                                   ting, follow these steps: Drill a '/,"    of bedding compound under the                   shipped with an SX-201 speed
                                   pilot hole in the center of the           flange on the outside. Be sure to align         transducer. Your knowledge of wake
                                   selected location. This should be         the fitting so that the holes for the           and wash created by your boat
                                   done from inside to ensure accessi-       retaining pin are pointed fore and aft.  4      should be used to locate the best
i                                  bility. Next, using a hole saw, make      Tighten the nut firmly from the inside
                                                                                                                             mounting position on the transom.
                                   a hole 21/,," in diameter using the       of the yacht. Do not overtighten. Do      ,     Some general recommendations are
                                   pilot hole as center. The body of the      not use a wrench on the plastic         1
                                                                                                                             shown graphically here:                         TWIN 110 DEEP VEE HULL
                                   thru-hull fitting should fit snugly       thru-hull.                               1            Drill pilot holes for the three
                                   through that hole.                               At this point, we urge you to
                                          It is recommended that a block     install either the plug or the impeller
                                                                                                                       /     self-tapping screws provided in the
                                                                                                                             hardware kit. Use a small amount of
                                   of 3/8" or M" plywood be drilled (2lAs"   assembly into the thru-hull fitting as   1      bedding compound on each screw
                                   diameter) and mounted between the         a precaution against launching the
                                   hull and hex nut. This acts as a lock-
                                   ing device on rigid hulls such as
                                                                             yacht with the hole open. The retain-
                                                                             ing pin should be installed to keep
                                                                                                                       /     and attach the SX-201 transducer
                                                                                                                             using a flat and a split lock washer
                                                                                                                             under the screw.
                                   fiberglass. It also provides a com-       the plug or transducer securely in       I            After installing the SX-201
                                   pliant interface to accommodate
                                   variations in hull inner surface (see
                                                                             place. Be sure the arrow on the
                                                                             impeller assembly is pointed forward.
                                                                                                                       '     transducer, tilt the unit downward
                                                                                                                             approximately 2", (figure 22).
                                                                                                                                                                             LOCATE SUCH THAT TRANSDUCER

                                   Figure 19).                               The O-rings provided should be
                                                                             installed in the two grooves of both     '
                                                                                                                       I           Securely tighten the hex head
                                                                                                                                                                               IS OUTSIDE OF PROP WASH

                                                                                                                             bolts which attach the impeller
                                                                             the impeller transducer and the plug. @
                                                                                    The silicone grease provided
                                                                                                                           assembly       to the right angle brackets.                                          Figure 21
                                                                                                                                   With the transducer installed in
                                                                             will help seal the O-rings and ease       I
                                                                                                                             the transom mount bracket, select a                                                Fiaure 22
                                                                             removal of the assembly. Keep the               location well above the waterline to
                                                                             plug handy.                                     feed the 10' cable through the tran-
              REMOVABLE A-120 TRANSDUCER                                            Next the 30' long coaxial cable          som. Drill a 7/16u hole to clear the
                                                                             should be installed in the yacht to             coaxial connector and secure the
                                                                             connect the transducer to the                   loose cable using the clamps pro-
              O-RING SEALS
            KEEPCLEAN8 LU                                                     instrument. Securely position the              vided. It is recommended that the
                                                                             cable connector at the transducer               hole around the cable be sealed
                                                                             end so that the connector will not be           with a flexible bedding compound to
                                                       RETAINING PIN          lying in the bilge water even when             prevent spray from entering your                                CABLE TO DISPLAY
                                                                              heeled.                                        boat.
                                                                                    Once the cable is connected
                                                 ALIGN HOLES FOR              between the transducer and the
                                               ETAINING PIN FORE 8 AFT
                                                                              main unit, the speed transducer is
                                                                              ready to operate.
                                                                                    The Link 5000 main unit is not
          OF HULL
                                                                              designed to operate with any trans-            Figure 20
                                                                              ducer except the one supplied for it
        THRU-HULL FITTING                                                     by Datamarine. Any attempt to mate               SX-201
                                                                              or calibrate to any other type of
                                                                              transducer is at the owner's risk.
                                                                                    Note: For cored hulls (balsa,
        SX-115, SX-125                                                        foam) and the SX-135 countersink
                                                                              thru hull fitting follow the hull rein-
                                                                              forcement and mounting instructions
                                                                              for the OX-130 depth transducer.
                                                                                                                               ,a=lte   a.   LID..   .,...,
                                                                                                                                                       ,   a,e

                                                                                                                                                                 DDlCLE "0
Speed Transducer Maintenance              final positioning. It is a good idea to     I                4           Black                       To complete the installation,
The transducer parts are susceptible      use a thread locking screw sealant          I                 5          Blue                  connect the cable from the junction
to fouling by marine growth or            such as Loctite on all masthead                               6          Yellow                box to the main unit terminals.
organisms as is any other under-          connections. It's surprising how             I                7          Shield                      NOTE: Make sure all wires
water part of your boat. We have          much vibration occurs on the mast                             8          Not Connected         (including the shield) are connected
applied a coat of anti-fouling paint to   truck.                                                    The masthead boom (rotating          in the junction box. This will assure
your impeller assembly. This first              The Link 5000 main unit may                  cups and wind vane) is designed to          proper operation of your Link mast-
coat should last the first season in      be field adjusted to compensate for                mount in the masthead mounting              head unit.
most waters.                              masthead mounting angles up to                     bracket. The boom should be slid                  This completes the wiring
      We urge you to flush the impeller   180' port or starboard. The mount-                 into the grommeted hole until it seats      required to connect the masthead
assembly and its cavity with fresh        ing bracket should be mounted                      firmly over the rear alignment pin          unit to the main unit.
water under pressure whenever the         horizontally (shim as needed) as                   (see Figure 23). At this point the
boat is hauled and renew the anti-        close to the top of the mast as pos-               boom retaining pin should be                                                                    Figure 23
fouling paint as necessary.               sible. An "L" shaped adapter bracket               inserted to its full extent. Make sure
      You may order replacement           is provided for mounting on the side               the wind cups are on the bottom end
parts for the impeller as follows:        of a mast if this is needed.                                                                            INSTAWTION of
                                                                                             of the wind sensor housing when the
- SX-120 - complete impeller                    The remaining section of the           I
                                                                                             boom is mounted.
- P-121 - impeller and shaft only
                                          cable should be installed from the
                                          final location of the main unit and run     I             The masthead cable connector
                                                                                             should now be plugged into the
- P-122 - retaining pin only
- P-123 - O-ring seals
                                          to the estimated location of the wir-       1      receptacle on the mounting bracket.

   (4 included) only
                                          ing junction box. Cable length is not
                                          critical and may be added to or             I      After mating the connector set, rotate
                                                                                             the locking ring until it seats to secure
- A-1 03 - retaining pin and              trimmed if necessary.                       @@     the connection. The cable is
   O-rings only                                  some thought should be given                designed to provide a drip loop, but
                                          to the problem of the masthead               1     this loop must not interfere with any
                                          cables slapping inside an aluminum                 masthead hardware (spinnaker, hal-
Mounting the                              spar. Some spars have an extruded                  yards, blocks, etc.).
                                                                                                                                                                    overall --          --
                                          track or cable raceway which pre-
Wind Sensor                                                                                         The masthead installation is

Masthead Bracket
                                          vents the noise. Sometimes small
                                          sailslide lugs can be found to travel        1     now complete and ready for

and Wiring                                 up an internal groove. The cable can        1            Mount the junction box in a dry,
                                           be run up the inside tied off to a          /     convenient location and, once the
                                          sailslide every few feet. As a last          ,     mast is stepped, run both cut ends
Prior to stepping the mast, lay out                                                    i
                                           resort, the cable can be pulled into              of the wire into it. Generally, there is
the cable and masthead mounting
                                          the spar while a helper goops the                  a good location on a bulkhead, up
bracket to determine the length of
                                           cable with silicone caulk. When the         I1I
the cable needed. Cable length                                                               high, clear of any possible bilge
should allow for running to a con-         cable is pulled into place, the silicone          water. Protect the cable going to and
venient, dry location for the junction    will bond the cable to the spar with               from the junction box from acciden-
box once the mast is stepped. Once        just enough force to prevent slapping,      7      tal damage. Install the spade lugs
                                          yet will permit removal if necessary.       I       provided and connect to the termlnal
the necessary cable length is
determined it should be cut and fed
down the mast from the masthead.
                                                If needed on a particular instal-
                                          lation, Datamarine can provide a
                                                                                        ,     strip (red to red, white to white, etc.)
                                                                                              as shown on Figure 24.
     The bracket should be                cable connector to use in place of                        Boats with masts stepped on
mounted so the grommeted hole             the junction box. Wire color and pin               deck can either run the cable
                                          connections are provided below. A                  through the deck through a gland fit-
and the rear alignment pin line up                                                                                                                                                    JUNCTION BOX DETAIL
                                          120' cable (Model WC-177) is also                  ting and use the junction box, or can
with the forelaft axis of the boat, the
                                          available.                                          use a waterproof connector (avail-
grommeted hole being forward. A
mounting template is provided in the               Pin #         Color                        able from Datamarine) at the base of
                                                                                                                                                                                 CABLE TO INSTRUMENT
back of this manual. The bracket                     1          White                        the mast.
may be moved slightly within the                     2           Red
confines of the adjustment slot for                  3           Green
      Masthead Repairs and                      To install a new wind cup
Replacement - Damaged wind               assembly, line up the set screw with             I       Troubleshooting                            Compass
cups or direction vanes may be
simply replaced without the need of
                                         the flat portion of the shaft and slide
                                         the assembly on the shaft until the
                                                                                                  If your wind functions are not operat-     Installation
                                                                                                  ing properly, the following items
returning the masthead assembly to       shaft is flush with the bottom of the                    should be checked before returning         Shipped with your optional
Datamarine.                              wind cup hub (see Figure 25).                            the wind instrument to the factory:        Datamarine L-500 compass sen-
      Both the wind cups and the         Tighten the set screw securely.                          - Check the mast step junction box
                                                                                                                                             sor is the instruction manual with
wind vane may be removed by              Please note: Individual wind cups                            (or connector) for correct wiring.     detailed installation instructions for
loosening the small set screw in the     are not replaceable,the whole three                      - Check polarity of power connec-
                                                                                                                                             this sensor. Please contact our
side of each assembly and sliding        cup assembly must be changed.                                tion at the main unit.                 LINK System Service Department
the cups or vane off of the shaft.              After changing the cups or the                    - With the masthead unit connected         for information on installing other
Loosen only the lower of the two set     vane, the masthead unit should be                            and the main unit power discon-        compass sensors.
screws on newer wind vane hubs.           reinstalled as directed in the section                      nected, the following resistances
      To replace the wind vane the        entitled "Mounting the Wind Sensor                          may be checked (with an
following steps should be followed:       Masthead Bracket and Wiring."                               ohmmeter) at the main unit rear
- Loosen set screw on vane hub.
- Remove old vane and hub.
                                                                                                      panel terminals or at the junction
- Install new vane and hub on                                                                               If there is an apparent short    The LINK 5000 main unit accepts
    the shaft.                                                                                        or open circuit, the Link wind sys-    LORAN cross-track error and
- Tighten set screw.                                                                                  tem will not work. One should try      distance-to-waypoint information in
- See section entitled "Wind                                                                          to isolate the portion of the system   the NMEA 0180 simple and complex
    Calibration"                                                                                                                             formats. This format is available on
                                                                                                      where the problem is and correct
                                                                                        @ tQ          it before damage to the instrument
                                                                                                                                             the Datamarine Navigator LC
                                                                                                                                             LORAN as well as many other high
                                                                            Fiaure 25                       The masthead unit would          quality Loran viewers. Please refer to
                                                                                                                              - 26
                                                                                                       appear as shown in Fiaure             the owner's manual for vour receiver
                                                                                                      to a D.C. meter.                       for installation instructions.

                                                                                                                                                                                                           Figure 26
                                                                      far                         Masthead Unit                                        Connector
                                                                                                  r - - - - - -1 Shield                          .,,   Terminal        Resistance (+/-I 0%)   Comments
                                                                                                  I                                          +   ,     1 to2        Approximately half        Due to (2) diodes
                                                                                              b                                  I                     4 to I       scale on I x scale.       in transmitter
                    loosen s e t screw                                                                                                                              infinity if meter
                    t o remove vane                                                                                                              6
                                                                                                                                                                    leads are reversed
                                                                                                                                                       2 to 3       8C2                       Transmitter rotor
           REPLACING                                 l o o s e n s e t screw t o                                                                 5     5to6         3Q                        Transmitter stator
                                                     remove windcups                                                                                   4 to 5       311                       Transmitter stator
          COMPONENTS                                                                                                                                   7 to any pin co (infinity)
                                                                                                                                                 4                                            7 = shield

                                          push on'until shaft is
                                          flush with bottom
550 Remote                                                                                   The 550 is nearly non-
                                                                                       magnetic so you don't have to
                                                                                                                                          Figure 27

Installation                                                                           worry about local deviation of the
                                                                                       steering compass. More important
                                                                                       is to not mount the 550 so close
                                                                               r       to the compass that the compass
                                                                                       is hard to use, especially when
                                                                                             First remove the guard by
                                                                                       unscrewing the two bolts at the
                                                                                       deck sockets. Pull the guard up
                                                                                       and off the upper pedestal
                                                                                             Slide the mounting brackets
                                                                                       over the guard base with the cor-
                                                                                       rect orientation for your type of
                                                                                             If you want to run the Link
                                                                                       network cable through the pedes-
                                                                                       tal guard tubing you should drill a
                                                                                       clearance hole for the cable
                                                                                       through the tubing and through
                                                                               $3      the deck at the center of the
                                                                                       guard socket. It is not necessary
                                                                                       to drill a hole large enough for the

The 550 remote instrument can be        simple installation. Also, having
mounted in a variety of different       the instrument at the wheel is the
ways. Its waterproof housing elimi-     most visible and convenient loca-
nates the need for additional instru-   tion for the helmsman.
ment pods or installation hardware.           First ensure that the pedestal
      In choosing a location consider   guard is tall enough to accommo-
visibility and convenience. Is the      date the 550 without interfering
keyboard within easy arms reach?        with the compass. The vertical
Can the displays be seen by every-      location of the 550 should leave a
one in the cockpit? An aft wheel        proper handhold in the top of the
location will make it hard for crew     guard. If the pedestal guard is too
members to use the display informa-     short, longer pedestal guards can
tion. Will a bulkhead or bridge deck    be obtained from the steering
mounted instrument be visible to the    manufacturer. Alternatively,
helmsman with crew and guests in         Datamarine can supply a pedestal
the cockpit?                             guard extension kit (Model L-341)         1
                                        which attaches to the base of the
- Pedestal Guard Mount - The
   550 is perfect for pedestal mount-
   ing. It's designed to accommodate
                                        existing guard and raises up the
                                        top of the guard a sufficient
   nearly all pedestal guards for a      amount to accept the 550.

                                                                                                                              Figure 28
connector as the cable can be                 It is also possible on some                - Overhead Mount - If an over-           kit L-342 may be ordered. Remove
cut for a connection point below        steering systems to run the Link                   head mount is desired the rear         the rear cover as just described
the deck in a dry location. Con-        cable through the pedestal itself.                 panel of the 550 can be rotated        but leave the buzzer in place. Dis-
nectors are provided in the instal-     An entry hole is often provided to                 180° to slant the front surface        connect the connector from the
lation kit. Although the Link cable     pass the cable through, or one                     down towards the operator (see         circuit board. Install the o-ring
is coax, it is not necessary to use     can be drilled. Be certain that the                figure 30). Carefully remove the       provided in the kit into the bracket
coaxial connectors at this point.       cable does not interfere with the            f     eight screws from the rear panel       groove and place the bracket,
The simple connectors provided          moving steering components or                      and open the instrument.The            o-ring up, over the skirt on the
will be totally adequate and are
much easier to make up than
                                        with any engine controls. Securely
                                        fasten it out of the way to avoid
                                                                                     D     buzzer must be removed to allow
                                                                                           the angled rear panel to fit in the
                                                                                                                                  rear panel. Reconnect to the circuit
                                                                                                                                  board and place the housing over
standard coax connectors.               cable damage or jamming the                        reverse orientation. A remote          the rear panel bracket assembly.
      At this point, the cable should   control mechanisms.                                alarm can be driven by the small       While holding the assembly together
be strung through the pedestal               The BNC connector used on                     white connector next to the            turn it over so that the rear panel
guard. Reinstall the pedestal           the remote cable is fitted with a                  installed buzzer. It will be neces-    faces up. Replace the 8 screws
guard with the brackets installed.      weatherproof boot which should                     sary to drill the rear panel to pass   and their sealing washers and
Attach the 550 instrument with the      make this connection point very                    the cable through for the remote       evenly and lightly torque the
four screws to the brackets. Sev-       reliable. Silicone grease should be                buzzer.                                screws to just mate the housing,
 eral holes are provided on the         applied to the mating halves                             Replace the eight case           bracket, and rear panel. Cut an
 rear panel to accommodate dif-         before assembly to keep water                      screws and evenly and lightly          opening in the mounting surface
ferent guard widths. Use the one        out. Dow Corning #4 is excellent                   torque. Apply only enough torque       using the template provided. Apply
 which will fit your guard best.        for waterproofing exposed con-                     to just mate the rear cover to the     bedding around the holes and
                                        nectors like these.                                housing.                               secure the bracket to the mount-
                                              Any exposed runs of cable
                                        should be well secured to prevent
                                                                                $ /Q     - Flush Mounting - If a recessed
                                                                                           flush mount is desired the optional
                                                                                                                                  ing surface with the four screws
                                        accidental damage.
                                        BulkheadMount - The 550 can             ..
                                        be mounted on a vertical bulkhead
                                        by bolting it directly onto the bulk-
                                        head using '/,-28 screws or by
                                        using the optional hinge brackets
                                        (L338). If bolting directly onto the
                                        surface use the molded in
                                        threaded inserts to receive the
                                        screws and the template provided
                                        in the rear of the manual to locate                    r
                                        drilled holes. You may order
                                        optional BNC right angle adapter
                                        Kit L-345 to allow a hidden coax
                                        cable installation.Apply bedding
                                        compound to seal the holes. The
                                        hinge mounts are very flexible and
                                        will provide a variety of mounting
                                        angles as shown in figure 29.

                                                                                                                                            '%   alarm
                                                                                                                                                                         Figure 30
                                                                                                                local conditions. Bottom condi-        of measure next to the value of
                   Operation                                   Depthsounder                                     tions, sea state, transducer instal-   the depth. Successive presses of
                   - System Power - Turn the Link              - General Information - The                      lation, boat speed and the vessel's    this button will change the
                       5000 System on with the toggle            Datamarine Link 5000 depth-                    electrical noise environment are       selection.
                       switch on the main unit lower             sounder is designed to meet the                some of the factors which will                Also, if a function other than
                       right. The ON position applies            demands of racing and cruising                 interact to limit maximum depth        depth is being displayed, pressing
                       power to the main unit and all            sailboats and power yachts. It will            indication. The user should antici-    this button will display depth in
                       remotes on the Link network. The          reliably indicate water depths                  pate a variation in maximum           whatever units were previously
                       LAMP position adds night lighting         between 2.5 and 400 feet (120          I
                                                                                                                depth   performance
                                                                                                                and operating         as location
                                                                                                                                 conditions change.    selected. Additional pushes will
                       to the main and remote instru-            meters, 67 fathoms) and inter-                                                         change the display to the other
                       ments. The lamo intensitv can be          faces with the Datamarine Link         I            The accuracy of the depth          units of depth. When the system is
                                                                                                                measurement is also affected by        turned off and later turned back
                       adjusted by pushingthe   @                network, supplying information to
                                                                 any number of depth or multi-                  several factors external to the         on the last unit of depth selected
                       button until the desired intensity is     function remote units which may                depthsounder. Variations in the         will be remembered and automat-
                       obtained.                                 be connected to that network. The              velocity of sound transmission in       ically selected.
                             On powerup, the unit will           significant features of your new               water caused by salinity, tempera-            NOTE: If an alarm has been
                       briefly display and test all digits       depthsounder are:                              ture and pressure plus penetration      previously set at 12 feet and a
                       and display symbols. The display                                                         of soft bottom layers by trans-         user switches the units to fathoms,
                                                                       Depth - Up to 400 feet, 120
                       should look like this:                                                                   mitted signal can cause errors of       the alarm setting is now 12
                                                                 meters, or 67 fathoms in user-
                                                                 selectable units.                              up to 2% (velocity) and 1 foot          fathoms NOT 2 FATHOMS. Care
                                                                       Display - Low power LCD                  (mud penetration) under worst           should be taken when changing
                                                                 display.                                       case conditions.                        units of measure to check the
DEPTH HEADING                                                          Alarm - 39 position alarm,                    The sounder is calibrated for      alarm settings.
                                                                                                                a sound velocity of: 4800 feetlse-
ALARM A                                                          settable in ft/fm/meters.
                                                                                                                cond, a U.S. standard of
                                                                       Keel Offset - Compensation
T'ME FAULT                                                       is provided to allow depth read-                measurement.
WIND                                                             ings to be displayed and meas-                       The accuracy of the depth
                                                                                                                                                              These upldown controls are
SPEED                                  REL ANGLE                 ured from the waterline or the                  measurement circuitry of the           used to adjust the alarm threshold.
LOG VMG      AVERAGE              MILES DIRECTION                lowest part of the keel.                        depthsounder is within plus/minus
                                                                                                                 0.5% over a temperature range of       Pushing the lr(button will first dis-
                                                                       Network Interface - This
                                                                 depthsounder provides Link depth                0 degrees C. to +55 degrees C.         play the current alarm setting with
                                                                 information for remote instruments              and a voltage input range of 11 to     the "ALARM" symbol. Successive
                                                                  located throughout the boat.                   16 volts, d.c. This corresponds to     pushes will then advance the
                             Next, for a few seconds the                                                         plus/minus 0.5 feet at 100 feet.       alarm setting to greater values.
                       display will show the software                  Ease of Operation - The
                                                                 depthsounder is totally automatic,              Operation                                he lV( button will decrease the
                       revision installed. This revision
                       number will h e l us~ answer anv
                       questions that you may have
                                                                 allowing for "hands o f f operation.
                                                               - Performance - The performance
                                                                                                                m                                       alarm settings. When the button is
                                                                                                                                                        released the last displayed value
                       about your system. The remote             of the Datamarine Link depth-                         This button selects which        will be stored as the alarm limit. If
                       software revision may be different        sounder relies upon a powerful                  unit of measure the depthsounder       the actual depth drops below the
                       than the main unit.                       transmitter used in conjunction                 will operate with. Selecting one of    stored alarm depth tne alarm will
                             Next, the display will change       with a proven transducer and a                  the three will cause the LCD dis-       sound.
                       to the function selected for display      sensitive amplifier to enable oper-        I
                                                                                                                 play to indicate the selected unit
                       before the power was turned off.          ation at great depths. Operation at
                       At this point, any other function         great depths is controlled by
                       may also be displayed.                    many factors; thus, ultimate depth
                                                                 capability is a function of current
       If the depth alarm feature is         convenience, however, any unit's                bottom. First, measure the actual              The display will read feet and will
 not desired, push the muntil                mute control will silence any Link              depth of water accurately using a              either indicate a number to indi-
                                             alarm that may be sounding.                     lead line overside close to the                cate an offset above the trans-
 Alarm "OFF is displayed.                                                                    position abeam the transducer                  ducer (as in reading depths from
                                                   Note that the minimum oper-
       When the alarm sounds, it             ating depth between the trans-                  (not at bow or stern).                         the top of the water) or a number
 may be temporarily muted by                 ducer and the bottom is 2.5 feet.                     Next, if depth below the sur-            with the minus (-) symbol to indi-
 momentarily pushing either (    111 or     The 1 foot alarm setting is useful               face is the desired indication,                cate an offset below the trans-
                                             only when the keel is at least 1.5              remove the black rubber plug                   ducer (as in reading depths from
      . This will disable the audible
                                            feet below the transducer and the                from the front panel labeled                   the vessel's keel).
 alarm, but when the boat returns            keel offset control (see Depth                  "Depth Offset" and adjust the                        A reading of "0" indicates
to water deeper than the alarm               Offset) has been adjusted to indi-              control clockwise (with the small              that depth readings are being cal-
 setting the alarm function will be                                                          screwdriver provided) until the                culated from the transducer and
                                             cate the depth below the keel.
 reactivated and the buzzer will                                                             5000 indicates exactly the mea-                may not take into account keels
                                                   The 5000 may occasionally
 sound again if the boat returns to          detect a false shallow echo as a                sured depth. Replace the rubber                or props which are below the
 shallow water a second time. For                                                            plug.                                          location of the transducer.
                                             result of fish or wake causing the
 example, if you have the setpoint           alarm to sound momentarily in                         Or, instead, if the desired                    The number in the Offset
 at 10' and the depth drops to 8'            error.                                          indication is depth clearance                  display is the number in feet that
while entering a harbor, the alarm                                                           below the keel, you must also                  will be added to or subtracted
                                                   Should the operating condi-
will sound. If adequate water depth                                                          know the exact draft of your ves-              from (if "-") the depth from the
                                            tions be such that the frequency
for the boat's draft is assured, you         of false alarms becomes a nui-                  sel. Subtract the draft from the               transducer.
can mute the alarm by pushing                                                                measured depth and adjust the
                                             sance, the alarm may be disabled                                                             - Shallow Gain Control and Adjust-
either button          .When you leave
the shallow harbor [and the depth
goes over the 10' setpoint] the
                                             by selecting the "OFF" position.
                                            ~l~~ See ..shallow ~~i~ ~~~~~~l~~
                                             in the following section.
                                                                               a   "   "
                                                                                             OFFSE3 counterclockwiseto
                                                                                             indicate the actual depth under
                                                                                             the keel. (See Figure 32).
                                                                                                                                            ment - The shallow gain control
                                                                                                                                            is located behind the small black
                                                                                                                                            plug on the front panel. Removing
alarm will sound again anytime                     The depth alarm setting will            - Offset Display - Holding
                                                                                                   -                                        the pluq will expose a small
the depth gets less than 10 feet.            stay the same numerical value                   the            button then pushing the         screwdriver slot to be used to
Whenever the depth is less than             when the units are switched from                                                                adjust the control.
                                            feet to fathoms or meters. For                   m=on            will display the keel
the setpoint, even if the buzzer is
 muted, the "ALARM" symbol in               example, if the alarm is set to 10               offset amount on the LCD display.
the display will continue to flash,         while in the feet mode and then
indicating that caution is in order.        the display is converted to
       Incidentally, this "mute" func-      fathoms, the alarm setpoint will
tion will also turn off the alarm at         become 10 fathoms (60 feet). Be
the 550 cockpit remote, even if the         aware of this as you could have a
cockpit alarm threshold is different        false sense of security after
than the main unit's. This remote           changing units. Remember to
control function saves running up           reset the alarm whenever the                                                                                         Depth             Offset
and down the companionway!                  unit's calibration is changed.                                                                                      Reading           Reading
       Of course the depth alarm          - Depth Offset - This front panel
may also be turned off by read-             adjustment may be used if it is                                                                               @        standard        @
justing the setpoint to a depth less        desired to have the 5000 indicate
than the current depth or to the            depth below surface or depth
                                                                                                               \                      1                    below transducer
"OFF position.                              clearance below keel. As shipped,
       Remember that the alarm              the 5000 was adjusted to indicate
setting at the main unit can be set         the depth below the transducer. It
to a different depth than the 550
remote's setpoint. This way the
navigator can use his instrument
without affecting any settings the
                                            should not be altered unless the
                                            user is prepared to proceed with
                                            an accurate readjustment.
                                                  To adjust the offset, the ves-
                                                                                                                                                          -below keel

helmsman may have entered. For              sel must be stationary over a flat
      This adjustment is used to
adjust the gain for the best com-
                                       Using Your                                      Depth Sounder                               procedure is to determine if the fault
                                                                                                                                   is with the 5000 system or the
promise between wake rejection         Link Depth Sounder                              Troubleshooting                             installation.
and reliable shallow depth indica-                                                                                                       If it is established that the
                                       Anchoring - Your depth sounder                  In the event the depth sounder              instrument is defective, return it to
tion. In general, the gain should be
                                       should be used to determine the                 should fail to operate properly, the        Datamarine for service with a brief
adjusted high enough to ensure                                                    t
                                       amount of line required to anchor               following section provides some             description of the malfunction.
proper sounding, but not so high
                                       properly. Determine the depth of the            troubleshooting guidelines as an aid        Repairs should not be attempted by
as to produce shallow readings
                                       water, correcting the displayed depth           to the owner and service technician         the owner as further damage may
due to wake. Insufficient gain set-                                               '
                                       if it indicates the depth below the             in isolating and correcting the prob-       result, and the warranty may be
tings may cause loss of echo
                                       transducer or keel. Add the height              lem. The goal of the troubleshooting        voided. See Section "Warranty
("FAULT 01" displayed) and/or
erratic operation. The shallow gain    from the water to the bow chock and                                                         Considerations".
setting is preset at the factory and   then multiply by 5 as a minimum (5:l            OPERATIONAL PROBLEMS
should only need to be adjusted        scope). Don't forget to allow for the
under extreme conditions.              tide. Pay out the necessary amount
       If the display shows "FAULT     of line.
                                               Contour Navigation - By                  Apparent Symptoms                      Probable Causes                      Possible Remedies
 01 " when in shallow water or
 misses the correct depth and dis-      using charts of your area and your
 plays twice the actual depth,         depth sounder, it is possible to rec-            Blank display; no indicators.          Unit defective or power not          Look for backlighting (at max.
 increase the shallow gain in small    ognize and navigate by underwater                                                       being supplied to 5000.              brightness) to test for power.
 increments by turning the adjust-     features. Contour lines generally run                                                                                        Check connections; fuses;
 ment clockwise.                       parallel to the shoreline except for                                                                                         rear panel circuit breaker.
       If the display has a tendency    breaks where channels or passages
 to show erratic numbers, especially    between islands occur. By following
 shallow numbers (3.2',4.1', etc.)     these contours you can locate these              Random, erratic depth indications Transducer in turbulent location          Review location, fairing and hull
 when in deeper water or when in        passages in fog. You can also follow            at higher speeds. Good at lower or cavitating at high speeds.               characteristics. See Installation ol
 wakes of other boats or "FAULT         a winding channel in fog more easily            speeds (under 10 knots).                                                    Transducer Section.
 07" (indicating too much shallow      than steering a compass course.
 gain), decrease the shallow gain              For more information on contour
 in small increments by turning the     navigation refer to the articles: "Nav-         Random, erratic depth ~ndications Excessive electrical interference         Review source of 12 volt power;
 adjustment counterclockwise until      igating in Fog" in Motorboat, October           when engines or auxiliary equip- introduced via power cord or               transducer cable routing. See
 the erratic numbers or the Fault       1978; "How to Use Your Depth                    ment is operating. Good with     transducer cable. Hull-borne               Power and Installation of Trans-
 indicator ceases.                      Sounder for Blind Navigation" in                quiet ship at all depths.         acoustical noise from engine.             ducer Sections. Consider alter-
                                        Rudder, June 1972.                                                                                                          nator noise suppressor, engine
                                               Fishing A Contour - Many                                                                                             vibration mounts.
                                       types of bottom fish are known to
                                        prefer specific bottom depths for
                                        feeding. Note the depth when you                Fault 01 display at moderate to        Power or gain reduced by low         Review power to 5000. Examine
                                        do catch fish. Then use your Link               great depths.                          voltage, improper transducer,        transducer installation and con-
                                        depth finder to follow that depth con-                                                 transducer at excessive angle        nections. Consult charts for
                                       tour along a shoal or bank.                                                             or poor bottom conditions.           unusual bottom conditions.

                                                                                        Fault 01 display all depths.           Acoustic signal not being            Examine transducer connector.
                                                                                                                               received. Unit or transducer         Try another transducer over side
                                                                                                                               may be faulty.                       if available.

                                                                                        Failure to indicate reliably at        Electrical noise interfering at      Review source of 12 volt power;
                                                                                      - ,moderate to great depths.             higher gain levels. Transducer       transducer cable routing. See
                                                                                                                               improperly located or damaged.       Power and lnstallation of
                                                                                                                                                                    Transducers Sections.
                                            units which may be connected to
Special Note To                             that network. The significant features               been calibrated for individual trans-       Average speed is calculated as:
                                                                                                 ducer installation.
Service Technicians                         of your new speedometer are:
                                            - Speed: Display speeds up to 35
                                                                                                      Proper performance of the
                                                                                                                                             Avg Speed =
And Owners                                     knots (40 mph).                                   knotmeter is dependent on good
                                                                                                 transducer location as well as cali-                      Total Time since Reset
                                            - Average Speed: Displays average
All Datarnarine digital depth sounders                                                           bration. This will be discussed later            The distance and time basis for
                                                speed since reset.
were precisely tuned under labora-                                                               in detail.                                  average speed is different than for
                                             - Log: Resettable LCD trip log up to
tory conditions. All Datamarine sup-                                                                  Aside from these considerations,       displayed log and time. For example,
                                                2,000 miles; mechanical total log
plied transducers are tested to                                                                  performance should not be affected          log or time can be independently
                                                up to 10,000 miles.
ensure operation with our sounders                                                               by the boat's environment. For              reset without affecting the average
                                             - Elapsed Time: Resettable for dead                                                             speed.
as factory tuned. Retuning cannot be            reckoning, race starts, etc.                     example, the Link knotmeter is unaf-
satisfactorily done when installed on
a boat. Operational problems cannot
                                             - VMG: Speed made good calcula-                     fected by usual electrical interference.                    -
                                                                                                                                                  To reset average speed, first
                                                                                                                                             push and hold H t h e n momen-
                                                tions, upwind or down.                           Operation
 be corrected by retuning.
                                             - Trend Indicators: Visual indication
                                                of increasing A or decreasing V
                                                                                                                                             tarily pushm.
                                                                                                                                             must be ~ u s h e d
                                                                                                                                                                  The two buttons
                                                                                                                                                                and held in that
                                                speed. Useful in sail and trim                   Push the            button to select the
  SUPPLIED BY DATAMARINE FOR                    change evaluations. Independent                                                              order. W ; have purposely designed
 THE LINK 5000. CHECK POLARITY                                                                   speed functions. A single push dis-         it that way to prevent inadvertent
                                                trend indicators are provided for                plays boat speeds. A second push
          AND CONNECTIONS.                      boat speed as well as VMG.                                                                   resets.
        Service bulletins are provided to                                                        momentarily displays average speed                The first few minutes after reset
                                             - SAT NAV Output: Rear panel ter-                   and then reverts to current boat
 qualified Datarnarine dealers. Many             minals supplying 200 contact                    speed.                                      generally show a large amount of jit-
 field problems are related to power             closures/mile to sat nav systems.                                                           ter in the average speed mode. This
 sources (noisy), fuses, transducer          - Impeller: Transducer, Model SXI 15            -         When in the SPEED mode, the           will
                                                                                                                                                  quickly clear to a very accurate
 cable connectors and improper                                                                   Link knotmeter will display the accu-
                                                 standard, SX125, SXI 35, SX201                  rate speed of the boat through the
 splices, these should be checked                optional. 4.1 hz/ knot standard cali-                                                             Remember that the average
 first. Prompt service is available at                                                           water with the following resolutions:       speed only shows for four seconds,
                                                 bration user adjustable.                        0.00 - 19.99 in .O1 increments
 our factory (U.S.) and foreign distrib-     - Network Interface: Provides speed                                                             and then the display automatically
 utors. Service at the factory is free                                                           20.0 - 35.0 in 0.1 increments               reverts to current boat speed. This is
                                                 and distance information for                           The effects of the damping
  under warranty and inexpensive out             remote instruments located                                                                  to prevent accidental confusion
 of warranty. We highly recommend                                                                control will be very evident in the         between the two functions. When
                                                 throughout the boat.                            speed mode. In rough weather min-
 that a malfunctioning instrument be          - Adjustable Damping: Four steps of                                                            displaying average speed, the
  returned to the factory with a con-                                                            imum damping will result in a very          "SPEED AVERAGE" indicators will
                                                 damping averaging to provide                    jumpy display (as much as 4-8
  cise statement of installation factors         jitter-free display under all operat-                                                       show.
  and failure symptoms.                                                                          tenths). Increasingthe damping rate               The average speed calculation
                                                 ing conditions.                                 will smooth the jitter to little or none.
                                              - Ease of Operation: The Link                                                                  can be used for navigation purposes;
                                                                                                        The "SPEED" indicator will           for example, to advance a dead
                                                  speedometer is totally automatic,               always be in the display whenever
                                                  allowing for "hands off operation.                                                         reckoned fix. Or it can be used to
                                                                                                  speed is selected. In addition to the       help trim the boat for maximum speed.
 General Information - The                                                                        display showing the speed of the
                                             Periormance - The Link knotmeter                                                                 Racers often use it to keep track of
 Datamarine Link 5000 knotmeter is                                                                boat, the speed annunciator
                                             provides an accurate display of boat                                                             average speed during each helms-
 an advanced microcomputer knot-                                                                  will be displayed along with a trend
                                             speed from 0.3 knots to over 35                                                                  man's turn.
 meterllog designed to meet the                                                                   indicator. This trend indicator (A =
 demand of racing and cruising sail-         knots. Alternately, a statute mile cali-             increasing speed, V = decreasing           @
 boats as well as all types of fine          bration may be used for speed in                     speed) will be shown each time the               This is the speed made good to
 motoryachts. It has a precise and           miles per hour. Though the instru-                   instrument detects a change in boat        windward (or downwind) display. It
 accurate speed range of 35 knots            ment is capable of readings of well                  speed.                                     will only operate correctly with both
 and a distance range of 10,000              over the top figure, accuracy is dim-                      When in the speed mode, a            the wind masthead and the speed
 miles. In addition, the Link knotmeter      inishing due to cavitation at the                     second push will show the boat's          transducer inputs to the main unit
 interfaces with the Datamarine Link         impeller. The knotmeter's quartz                      average speed since last reset.           operating. Resolution is as follows:
 network, supplying information to -          crystal time base and microprocessor                                                           00.00 to 19.99 in .O1 increments
 anv number of speed, speed                   guarantee accuracies for all func-         .   i
                                                                                             $ J
                                                                                               9                                             20.0 to 35.0 in 0.1 increments      %,->

 dependent, or multi-function remote         tions provided the instrument has           I
                     VMG is defined as the compo-                        last damping level selected before              Calibration - The accuracy of the                  Calibration of the Link knotmeter
                nent of the boat speed which is                          turning off the main unit is remem-             Link speed log functions, as previously      is done with one adjustment for both
                directly into or with the wind - a                       bered and automatically selected at             noted, is dependent on proper trans-         speed and distance. Your instrument
                detailed illustration and explanation                    next power on.                                  ducer operation as well as calibration.      will be calibrated by comparing the
                is shown below. The damping control
                applies to VMG as it does to speed.
                                                                            l                                      '
                                                                                                                         The system is capable of measuring
                                                                                                                         speed over 0.3 to 35 knot range with
                                                                                                                                                                      speed displayed by the Link knot-
                                                                                                                                                                      meter with the speed calculated by
                     In addition to the display showing                       This function gives the user               an accuracy of 1O/O. The distance            your charted distance and measured .
                VMG, the VMG annunciator will be                         access to the Link knotmeter's                  measurement accuracy is also 1%.             time, or by comparison to a loran
                displayed along with a trend indicator.                  elapsed time, which displays the                      Please note that speed and,            speed readout.
                This trend indicator (A = increasing                     elapsed time since last reset, or               therefore, distance are measurements               To calibrate the Link knotmeter
                VMG, V = decreasing VMG) will be                         since the instrument was turned on.             through the water and not necessarily        in the boat, the following guidelines
                shown each time the instrument                           Time will be displayed as follows:              "over the ground". Current can add           are recommended:
                detects a change in VMG.                                 Minutes and seconds - 00:OO to 19:59            or subtract to give the effective value.     - Select a course of known distance
                     VMG is defined as the compo-                        Hours and minutes - 00:20 to 19:59              Thus, any navigation reckoning                  with markers that can accurately
                nent of the boat's speed that is                              When the Link knotmeter is in              requires that knowledge of the cur-             be sighted. A course of 0.5 to 2.0
                directly upwind or downwind.                             any other mode, the elapsed timer               rents over the course travelled be              miles is sufficient in length to give
                                                                         continues to run until either a time            used to compute final speed and                 accurate results. The course
                                                                         reset is performed or power to the              distance over the ground.                       should be as free as possible
                 u                                                       instrument is shut off. At 1959 (HRS
                      This button selects four discrete                                                                       The calibration control located            from the effects of turbulence and
                damping levels. These damping lev-                       and MIN) the time resets to 0:00                on the front panel is used to adjust            current.
                els reflect averaging methods which                      (MIN and SEC).                                  the instrument's microprocessor to           - Under relatively calm wind and
                                                                              To reset the timer, first push             the particular hull and location of the         current conditions, make timed
                average speed readings over
                increasingly longer intervals. The
                higher the damping the less jitter you
                                                                         and hold the   a     button. then
                                                                                                                       - transducer. As discussed under
                                                                                                                         "Installation", the imoeller in the trans-
                                                                                                                                                                         two-way runs between markers (A
                                                                                                                                                                         & B), steering a true course. The
                will observe in the display (especially                  push the   @button. The display                 ducer does not measure the exact
                                                                                                                         speed through the water because of
                                                                                                                                                                         runs should be at a steady speed
                                                                                                                                                                         which are close to the normal
                true in rough water). The lower the
                damping the faster the display                           will change to "TIME 00:OO"                     boundary layer effects. Fortunately,            operating speed for the boat. (A
                response you will observe when                           m
                                                                                                                         the effect is proportional to speed so
                                                                                                                         that a calibration at one speed is
                                                                                                                                                                         two-way run will help minimize the
                                                                                                                                                                         effects of wind and current and is
           ..   boat speed changes. Damping app-
                                                                               Pressing this button will display         good over the full range. However,              essential if there is much of either
                lies to both speed and VMG. The
                                                                         the trip log distance since the last            calibration should be done at typical           present.) Make sure the boat is up
                                                                         reset. The display will read in hun-            cruising speeds; for example, a dis-            to speed when the runs start.
                                                                         dredths of miles up to 19.99 and in             placement hull should be calibrated                11 Calculate the calibration
                                                                         tenths from 20.0 up to 199.9. From              at somewhat less than hull speed,            speed by averaging the speeds over
                                                                         200 to 1999 miles the display will              while a planing cruiser should be            the ground for each run between the
                                                                         read in whole numbers only. The                 calibrated at the most economical            markers. This method of calculation
                                                                         annunciators "LOG" and "MILES"                  speed on plane.                              will cancel the effect of current dur-
                                                                         will be displayed.                                   This 'instrument was calibrated         ing the opposing runs (while dividing
                                                                               Regardless of which function is           at the factory for a typical installation    total distance by total time will not).
                                                                         being displayed on the main unit the            of the impeller on a typical boat.           This method will require measuring
                                                                         Link 5000 knotmeter log continues               Since the water flow characteristics         the distance on your chart and
                                                                         to accumulate until it is reset. When           may vary from one installation to            recording the time in seconds for
                                                                         power to the unit is turned off the log         another, it is a good idea to check          each run on opposite courses.
                                                                         reading is remembered and con-                  the calibration and recalibrate if
                                                                         tinues to accumulate when the unit                                                           SOG1 = DISTANCE (MILES)
                                                                                                                          necessary when the instrument is
                                                                         is turned back on and the boat is               installed on your boat.                             RUN TIME 1 (SECONDS)                .:,   %-

                                                                         moving. At 2,000 miles the loa will                                                          SOG2 = DISTANCE (MILES)

                                                                         autom~tically   reset to 0.00. "
    I A-        YMG
                       TO WINDWARD
                       COS    60'    =
                                          =   BOAT SPEED COS elT =
                                                                     I         To reset Log, first push and                                                                  RUN TIME 2 (SECONDS)
                                                                                                                                                                                                               -. 3

                              =                                                                                                                                       CALIBRATION SPEED =
                                                                                            push @. The
                6.40   (.5)         3.2   KNOTS
                                                                         hold @then
                                                                                                                                                                            (SOG1 + SOG2) 1800
                                                                             . -  should  show   "LOG 0.00
       If the distance used is in nautical   Knots - MPH Conversion - If you                Tro~lbleshooting      Guide - The                 Note that the instrument cali-
miles then the calibration speed will        calibrated the boat speed to display           Link knotmeter is not designed to          bration will be affected by progres-
be in knots. If statute miles are used       in statute miles per hour, then both           operate with any transducers except        sive fouling of the hull. The boundary
then the calibration speed will be in        boat speed and wind speed should               the one(s) supplied for it by Datama-      layer will effectively increase, and
MPH.                                         use MPH. Calculated functions such             rine. Any attempt to match or cali-        the instrument will indicate lesser
       NOTE: The speed calibration           as VMG and True Wind will be inac-         '   brate to any other type of transducer      speeds than when originally cali-
units (either in knots or mph) should        curate if mixed units are used.                will not work. The unit is designed        brated. The proper remedy is hauling
be kept the same as the units                       To convert to MPH, an internal          and warranted for operation on 12          and cleaning of the boat's hull.
chosen for wind speed or VMG and             jumper must be cut. Remove the             ?   volt battery systems only.                        If the impeller and cable seem
TRUE WIND will be incorrectly cal-           four rear panel screws and open the                  Should your Link 5000 fail to        proper, but the instrument does not
culated. See section entitled "Knots-        rear of the instrument. Locate and             operate at all, check power wiring.        respond to the hand-turned impeller
MPH Conversion".                             carefully cut out the jumper. Remov-           When power is applied in the proper        signals, check further by disconnect-
       21 Set the boat up on the same        ing the jumper will automatically              voltage range and polarity, the            ing the cable and shorting the trans-
point of sail or engine RPM to return        convert wind speed from knots to               numeric display should appear.             ducer input jack. Rapidly and
to the same average speed as before.          MPH. Replace the four case screws.                  Should your knotmeter suddenly       repeatedly shorting the inner con-
       3 1 Push @ for boat speed             (Zero ohm resistor, one black band,            lose its calibration, reading lower        ductor to the outer body of the coax-
                                              left rear corner of middle p.c. board.)       than actual speed, or display only         ial connector should cause the
in the display.                                     The LORAN cross-track error
       41 Adjust the front panel SPEED                                                      0.0 knots when underway, the fol-          speed display to read other than 0.0.
                                             and distance-to-waypoint will also             lowing should be checked:                  If it does, the main unit is probably
 CAL adjustment until the displayed           be converted to statute miles. By
 speed agrees with the calculated                                                           - Transducer Connections - A               not at fault and the impeller and
                                              cutting the jumper and calibrating               small amount of water (especially       cables should again be checked for
 average speed. Use the small screw-         the knotmeter to MPH all displayed
 driver provided to fit the internal con-                                                      saltwater) will effectively short out   faults. The transducer assembly
                                              and network transmitted units will be            the transducer signals. Check           itself contains internal solid-state
trol. Clockwise rotation will increase        based on statute miles. This will
the displayed speed, counterclock-                                                             cables, dry out connections.            components that cannot be field
                                              ensure that all distances (Log, XTE,          - Impeller - Should be removed             repaired. A replacement is required.
 wise will reduce it.                         Range) will be consistent and that all
       51 Replace the rubber plug.                                                             and inspected for non-fouled,                  If the instrument does not
                                              calculated functions (VMG, True                   undamaged, free-turning condition.     respond to the shorting of the trans-
       Alternatively, the actual boat         Wind, Mag Wind Direction, % Reach,
speed can be determined from a                                                                 Keep the thru-hull plug handy at        ducer input, internal problems would
                                              OO Tack, and E3A) will be accurate.
                                               /                                               all times. Spin the impeller by         be indicated. At this point, your dealer
 loran speed readout. However,
 remember that the loran shows                                                                  hand to verifv that o~eration  is      or the factory service department
                                                                                               restored. A I ~ O check that the        should be utilized. See "Warranty
groundspeed, not speed through the
 water. Be sure to calibrate the unit at
                                             Troubleshooting                                   arrow on the transducer ~oints          Considerations" for information on
 a time and location when the wind           Speed unctions                                    forward.
                                                                                                   In saltwater and weed-filled
                                                                                                                                       factory service.
                                                                                                                                              Fuse Blowing: Power problems
 and tidal effects are minimal.
       Also note that the loran ground-      Datamarine is extremely proud of               areas, transducer impeller fouling         resulting in repeated fuse blowing or
 speed is derived from its analysis of       the Link knotmeter and the way it is           can occasionally occur and low             tripping of the rear panel circuit
 the past few minutes' location fixes.       constructed. As with any electronic             speed readings will result. Remove        breaker require servicing of the
 As a result, there is a considerable        equipment, however, many outside                and clean the impeller and cavity         instrument itself if the power lines
  lag between actual boat speed or           factors may influence proper opera-             and renew the antifouling paint if        check out correctly.
 direction changes and the loran's           tion, and there is always a chance of           necessary.                                       Fault 01. This indicates missing
  averaged response. If using the            component failures within the                         If erratic readings are observed    wind data needed for the VMG cal-
  loran speed display, be sure to set        instrument. As a first line of help to          at certain boat speeds, look for faulty   culations. This condition is caused
 the boat up on a particular heading         the owner, we have provided the fol-            connections that may be vibrating or      by the Link wind input not being
  and speed and maintain it for 5 min-       lowing short troubleshooting guide to           an improper transducer installation       installed or operating properly.
  utes or more. Only after 5 minutes of      assist you in isolating certain types           as discussed in the foregoing sections.
  steady heading and speed will the          of problems.
  loran groundspeed display be                     If, at any time, you need the
  accurate.                                  factory's assistance for any problem
                                             whatsoever, please call us. We are
                                              available to assist you in any Link
                                           Operation - The two WlND push                           True wind angle is generally           ful for tactical decisions. "Am I get-
Wind Functions                             buttons are used to choose the type               used for optimizing boat performance.        ting a wind shift, should I tack?" or
General Information - The Link             of wind information to be displayed.              Upwind, each boat in any particular          "When I round the windward mark
5000 wind system contains a multi-         Their functions are as follows:                   wind, sea and sail configuration has         will it be a port or starboard spinnaker
function wind instrument designed to                                                         an optimum true wind angle to main-          set?" By electronically adjusting for
                                                   This display is the appar-
meet the demand of racing and                                                                tain. Also, sail selection is best made      changes in the current boat's head-
                                           ent wind instrument information. It               by reference to true wind strengths          ing, real changes in the prevailing
cruising sailboats as well as all types
                                           indicates the wind that one feels                 and to true wind angles.                     winds can be picked up much more
of power yachts. It gives the user
                                           moving with the boat through the                        True wind direction is very use-       easily.
true wind both relative to the boat's
                                           wind and will not indicate the actual
heading and to magnetic north, as
                                           spe&$sr direction one observes with
well as the usual apparent condi-
                                           the boat at rest.
tions. In addition, the Link wind sys-
                                                 The display will show in the                                                                                                        I Figure 34
tem interfaces with the Datamarine
                                           center the apparent wind angle with
Link network, supplying information
                                           the O indicator as well as the appar-
to any number of wind, wind
                                           ent wind speed above and to the
dependent and multi-function remote
                                           riaht of the anale. When in the
units which may be connected to
                                           apparent windmode the "APPR REL
that network. The significant features
                                           ANGLE" indicator will always be on.
of your new wind instrument are:
- Display: Low power LCD display           @ Will cause data to be dis-
   of wind speed and direction
                                           played which is compensated for the
                                           vessel's speed. This display is equal
                                           to what one would observe if the

   Apparent wind - as observed on          boat was at rest. Actual boat speed
   board                                   affects both speed and direction of
   True wind angle - relative to boat      the apparent wind one would
   True wind direction - relative to       observe while under way. This func-
   magnetic north                          tion calculates this effect and
 - Wind Speed Is user-selectable for       removes it.
   either knots or mph.                          The first push of this button dis-
 - Masthead: Uses Datamarine's             plays the true wind angle, i.e. the true
   WX-175 masthead unit. A proven          wind speed and its angle relative to
   aircraft type synchro design            the boat's current heading.
   weighing less than 16 oz.                     A second push will cause true
 - Compass Input: Interfaces to any        wind direction to be displayed. The
   electronic compass with "N+1"           true wind direction is the actual wind
   output.                                 relative to magnetic north. This will
 - Network Remotes: This wind              only display if an electronic compass
    instrument provides Link network       has been connected to the main
   wind information for remote             unit. The LCD will clearly indicate
    instrument(s) located throughout       which wind function is being
   the boat. The wind instrument also      displayed:
    provides wind information to the       APPR REL ANGLE apparent wind
    knotmeter for VMG calculations.        speed and direction
 - Operation: The wind machine is          TRUE REL ANGLE true wind speed
    totally automatic allowing for         and angle off the bow
    "hands off" operation. As one          TRUE MAG DIRECTION true wind
                                                                                                           APPARENT                        TRUE                         BOAT
    sails, the Link wind instrument will   speed and direction with respect to
                                                                                                             WlND                          WlND                          SPEED
    give continuous wind direction         magnetic north
                                                                                                         14 KNOTS   - 37O              1 0 KNOTS   - 60'            6 . 4 0 KNOTS
    and wind speed readings through
    360 degrees.
      Damping: This control is a push         tape before the mast is stepped.
button that selects four discrete             [Hint: A light li-ped   to the
damping levels. These damping lev-            upper part of the masking tape
els reflect averaging methods which           can be gently pulled after calibra-
average speed and wind readings               tion is complete. This will peel off
over increasingly longer intervals.           the tape and eliminate the need to
The higher the damping level the              go up in a bosuns chair!]
less jitter you will observe in the dis-   3. The instrument can now be
play (especially true in rough water).        aligned to the known vane position.
      The lower the damping level          4 Select         Using the small
the faster display response you will
observe when wind or boat speed              screwdriver provided, rotate the
changes.                                     wind angle calibration control to
      The same damping level is              change the displayed reading.
used for wind functions, speed func-         Moving the control to the full
                                                                                                                                                                               Figure 35
tions and boat heading.                      clockwise position will lock on to
                                             the wind angle in the display at                  A good way to fine tune the          speed is desired in statute miles per
      Pressing the button the first                                                      setting is to note the apparent            hour instead of knots, see the sec-
time will display the current level of       that moment, then will cause the
                                             displayed wind direction to rotate          wind angle on each tack to wind-           tion "Knots-MPH Selection." If wind
damping. Successive presses will                                                         ward. If it is different on either side,   speed is displayed in mph, boat
raise the level of damping until level       to the right by one degree per          (

                                             second. Full counter clockwise will     h)the offset angle probably needs to           speed should also be calibrated in
4 is reached. The next press returns                                                     be calibrated. A likely correction         mph so that computed functions are
to damping level 1. The damping              rotate the displayed wind direction
                                             to the left. When displayed on a            would be half of the difference            accurate.
level is displayed as "3P: " through                                                     between the two apparent angles.
"d:I9   : The display will automatically
          '                                  360' analog meter such as the
                                             550 remote, a clockwise control             For example, if the boat is "in the
 return to the last selected function a                                                  groove" at 40' on port tack and
few seconds after pressing the               rotation establishes a 1O / second
                                                                                         36O on starboard, the setting
damp button. When power to the               clockwise pointer movement. A
                                             counter clockwise adjustment                should be rotated to the right             wind
 main unit is turned off the selected
 damping level is stored in memory           produces a counterclockwise                 (clockwise) by 2" (400- 360).              Troubleshooting
 and will be automatically selected          pointer movement. A short buzzer
                                                                                                              2                     Several diagnostic modes are incor-
 when power is restored.                     beep indicates when each degree
                                             is added or subtracted. The lock            Turn the adjusting screw to the            porated into the 5000 to assist trou-
                                             on feature eases calibration when           right until 2 beeps are heard then         bleshooting. When either apparent or
                                                                                                                                    true wind is selected, fault codes
Wind Calibration                             the boat is swinging at the moor-
                                             ing or the wind is shifting.
                                                                                         center it.
                                                                                               Note: Be sure to leave the           may appear in the display if a prob-
Angle Calibration - The 5000                       When desired alignment is                          adjustment in the center      lem exists.
must be aligned with the masthead            reached move the control to the                          (no beeping) when the               Fault 01: Indicates that no mast-
vane.                                        center of its rotation until the                         calibration is completed.     head wind information is being
1. Remove the small rubber plug              buzzer stops and the display is                          This will load the angle      received by the main unit. This could
   marked "Wind Angle" on the front          stable. The display will then                            offset into the non-          be caused by a number of things
   panel.                                     rapidly change to the current wind                      volatile memory and           including missing or defective mast-
2. Set the boat up on a heading              vane angle with the new offset                           prevent accidental            head, broken or incorrect masthead
   which produces a known appar-             applied.                                                 changes.                      wiring, defective components in the
   ent wind angle. The easiest is 10                                                                                                 main unit, etc. One should carefully
   put the boat head to wind on a                                                                                                    check the wiring and the masthead
   mooring for a 0° apparent angle.                                                      Wind Speed Calibration - As                 (as described in the masthead
   Alternatively, the vane can be                                                        shipped the 5000 is accurately cali-        installation section) to isolate the
   fixed at any particular angle. A                                                   i-'brated to display wind speed in knots.      cause of this fault. This fault will be
   good way to do this is to tape the                                                         Except for the knotslmph               displayed if apparent wind, true wind,
   vane fore and aft with masking                                                        select~on, no further adjustment of         or VMG is selected and the wind
                                                                                         wind speed is necessary. If wind            information is missing.
      Fault 05: This indicates missing
data needed for the calculated func-
                                         Magnetic Compass                              550 Remote
tion MAG (True Wind MAG Direc-           Display QQb                                   Operation
tion) or for MAG-HDG display. This
condition is caused by missing
compass data, or due to the fact a
compass is faulty or not connected
to this instrument correctly. NOTE:
Only N+l format (at 5 volt TTL           This button will display the current
levels) is acceptable as a compass       boat heading in degrees magnetic.
input.                                   The electronic compass input is dis-
      Refer to the masthead installa-    played directly in addition to being
tion section to determine if the mast-   transmitted on the Link network for
head and associated wiring is faulty.    use by other instruments and for
Most wind failures can be traced to      computed functions.
masthead cable and connector                   Remember that this heading
problems.                                display and any function which uses
                                         boat heading is only as good as its
                                         source of data. Be sure the compass
                                         sensor is properly compensated
                                         ("Swung") and is free from varying
                                         sources of local deviation, e.g., tool-
                                         boxes, portable radios. Follow the
                                         compass manufacturers instructions
                                               The damping control also has
                                         influence over the heading displays.
                                         If the heading numbers have too
                                         much jitter. push the            but-
                                         ton to increase the damping level.
                                               The compass functions will only
                                         work when a compatible electronic
                                         compass sensor is installed. If no
                                         sensor is installed or if the data for-       In most ways the operation of the           except that, for convenience sake,
                                         mat is incorrect the 5000 will display        remote is similar to the main unit.         you can mute an alarm ringing at
                                         "FAULT 05." Check for power and               Keyboard arrangement and func-              any other Link instrument. How-
                                         correct operation of the compass              tions are nearly identical.                 ever, be sure you know why the
                                         sensor.                                            Remember that the 550 remote           alarm is sounding before disabling
                                                                                       has its own computer and operates           it. The 550 remote will display
                                                                                       nearly independently of the main            depths to 999 feet or equivalent in
                                                                                   I   instrument.                                 meters or fathoms, has a dedi-
                                                                                       - Depth Functions - The depth               cated alarm mute key and will
                                                                                          units and the depth alarm position       accept alarm settings to 900 feet.
                                                                                          can be set at the remote to differ-      It operates just like the 5100 main
                                                                                          ent values than those at the main        unit otherwise.
                                                                                          unit. Varying these settings at the     - Speed Functions - Again, the
                                                                                          remote will have no effect on the         speed functions are independent
                                                                                          settings at the main instrument. If       of the corresponding ones at the
                                                                                          a depth alarm rings at the remote         nav station. Time, Log and Aver-
                                                                                          ~twill not ring at the main unit (and     age Speed can each be reset at
                                                                                          vice versa). Each is independent,
      the remote without affecting the         1. Depth units - the units most
      information on the main unit. In            recently selected FTIMIFM              Warranty                                  track the Link systems in the future
                                                                                                                                   for update information, product
      each case, the procedure is the             will be remembered and depth          Your Datamarine Link 5000 system           improvement alerts, and the above
      same as on the main: first press            will be displayed in that form        components are covered by a 12-            mentioned users' group. Als?, our
      and hold            then push the           when the unit is turned on            month limited warranty and a sub-          warranty and service programs are
                                                  again.                                sequent 4-year service program. All        an important part of our product.
      function to be reset.
                                               2. Depth alarm settings - will be        repairs are done at the factory or at      We're committed to standing behind
    - Damping - The                control        retained for future use.              one of our service depots. We will         our product, fixing it, and updating it.
      affects the damping level of the         3. The function selected for each        accomplish the repair of your              We need your warranty registration
      wind as well as the speed func-             display will be remembered            instrument within 48 hours.                card to help us serve you best in the
      tions. For proper calculation of            and will reappear automatically              Basically,this warranty will pro-   years ahead. Please respond!
      computed functions, all quantities          when power is reapplied. This         vide for the free repairs of faulty Link
      in the system are damped to the             will prevent possible confusion       instruments returned to us for one
      same extent. As a result, when              in case power is lost tempo-          year from purchase date, except for
      the remote damping is changed,              rarily due to an engine start for     obvious causes like mechanical
-     the main unit damping is changed            example.                              abuse, over-voltage, etc. The service
      as well. Damping level selection         4. The trip log and average speed        program guarantees prompt repair of
      and display operate as on the               basis will be retained for future     instruments beyond warranty at a
      5100 main unit.                             use. Remember to reset these          maximum charge of only 10% of the          Warranty
                                                  at the start of a new trip if you
    - Wind Displays - The central dis-
                                                  do not wish to increment the
                                                                                        list price of the unit. Please consult
                                                                                        the warranty statement for exact
      play of wind gives the apparent
      wind angle and speed. When first            existing log reading or average     ~3details.                                   PLEASE NOTE
      turned on, the pointer will turn            future speeds with past ones.                Upon registration with Data-
      through a self-calibrating 360'          5. Damping level.                        marine, each Link system owner will        Warranty will be voided by:
      swing then immediately advance         - Lighting - The main unit's toggle        receive a service ID card with a           IMPROPER FUSES
      to the correct angle. Wind angle         switch controls system lighting          special 800 telephone number for           OVER-VOLTAGE DAMAGE
      changes will be reported with a          and will turn on the remote lighting      Link system service. In addition, that    PHYSICAL DAMAGE
      112" resolution.                         to mid intensity. Adjust it up or        card will contain data pertaining to       SALTWATER IMMERSION
           Wind speed is displayed in                                                   warranty, service, and contacts at         IMPROPER ATTEMPTS AT REPAIR
                                               down from there with the
      whole numbers in the digital dis-                                                  Datamarine. To receive this quick
                                               button.                                   reference card, please return your        For prompt factory service, mail or
      play. Calibration will be in knots,
      unless the main unit has been          - Weather Cover - An attractive             owner's registration cards as soon        s h i to:
      modified to display statute miles        canvas cover is supplied with             as possible after installation of your
                                                                                                                                   Link System Service
      per hour. Should a wind fault occur      your unit. While the boat is not          equipment.
                                                                                                                                   DATAMARINE INTERNATIONAL,INC.
      and the remote no longer receive         being used the cover will protect               To register your warranty,
                                                                                                                                   53 Portside Drive
      network wind information the             the instrument from U.V. rays and         please fill out and return the enclosed
                                                                                                                                   Pocasset, MA, USA 02559
      pointer will point directly astern       from rain and dirt. It will pay to        postage-paid warranty card. This will
                                                                                                                                   Telephone: (617) 563-71 51
      and two dashes will appear in the        replace the weather cover while           help us serve you better in the future.
      wind speed LCD.                          the boat is idle.                         We at Datamarine hope to establish        (Include return address and symp-
            Wind fault = Pointer South,                                                  a fraternity of Link system users over    toms and as much information as
                                             - Winter Storage - If the boat is
      "--" in LCD.                                                                       the next decade. This group will be       possible about installation factors.)
                                               laid up for any period of time
                                                                                         kept up-to-date on new Link devel-
    - Memory - Both the main unit              especially in extremely cold cli-
                                                                                         opments, Datamarine, and other user       REPAIRS OUT OF WARRANTY
      and remotes have independent             mates, it will be a good idea to
                                                                                         experiences.To do this, it is vitally     WlLL BE PERFORMED AT MODEST
      memorys which retain certain             remove the Link instruments from
                                                                                         important that we receive your            COST FOR LABOR AND PARTS.
      information when the instruments         the boat. Store them in a safe dry
                                                                                         owner's registration ?arb back at the     THE INSTRUMENT WlLL BE
      are turned off. These memorys            location away from the condensa-                                                    RETURNED TO ADDRESS SPECI-
                                                                                         factory. We will not sell your name to
      require no current, no batteries         tion and temperature extremes                                                       FIED WITH A C.O.D. CHARGE FOR
                                                                                         others or use it in any way you might
      and will store this information          which they would experience on                                                      SERVICE AND FREIGHT.
                                                                                         object to. Our main purpose is to
      indefinitely.                            the boat.
      Limited 12 Month Warranty                                                   Four Year Factory Service Program
            Datamarine International, Inc. of 53 Portside Drive, Pocasset,              In consideration of the purchase of this product, Datamarine
      Massachusetts, warrants to the owners of its product that such              shall at any time within 4 years following the expiration of the
      product shall be operative and free of defects in factory-provided          warranty period, repair and recalibrate any product other than one
      material and workmanship for 12 months after original purchase,             which has been altered, damaged by negligent installation,
      however, in the event the attached warranty card endorsed by the            mishandling or improper operation for a nominal charge, not to
      selling dealer is not returned to Datamarine, Inc. at the above             exceed 10% of the original retail price except that components
      address within 30 days of the time of purchase, the full warranty           subject to constant wear, installation and environmental hazards
      period shall be for the 12 months after the date of manufacture. This       such as, but not limited to, flow sensors and transducers, will be
      warranty does not cover damage resulting from negligent                     provided at current published prices. All such charges, plus freight
      installation, improper operation, unauthorized repair andlor                or postage, shall be assessed to the owner by C.O.D. return
      substitution of component parts other than those provided by                shipment of the repaired product. The product must be returned,
      Datamarine. Full performance specifications (expressed or implied)          postage prepaid, to the factory for repair and should be
      which can be adversely affected by installation and operating               accompanied by a legible return address and brief statement of
      environment are not guaranteed under this warranty.                         malfunction. Services under this program will be available at any
            Any defective Datamarine product which is received by                 time of year and will be completed within 48 hours of receipt of
      Datamarine during the warranty period will be repaired or replaced          product.
      free of charge at the option of Datamarine.

1-                                PROCEDURE

             The product must be returned, postage prepaid, to the factory
       for repair and should be accompanied by a legible return address
       and brief statement of malfunction. Services as described above will
       be available at any time of year and will be completed within 48
      ihours of receipt of product. Components, permanently installed and
     ' contributing to the integrity of a hull need not be returned for repair.
       Datamarine will make every attempt to effect repairs when only the
       instrument porlion of the product is returned.

                              LIMITS OF LIABILITY

            The foregoing shall constitute the sole and exclusive remedy
       of any owner of this product for breach of warranty including the
       implied warranties of merchantibility and fitness. IN NO WENT
Datamarine International Inc.   "*,
     53 Portside Drive          .
                                i   <
                                    r   e

 Pocasset, MA USA 02559         &+,S ,
      Telex 940-445

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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.