Wednesday, November20, 2019 L-36.com

Dsm 400 Installation Instructions 87092 2 En



Note:

This is the new page for displaying documents. It allows documents to display on devices without pdf viewers specifically mobile devices, a new Google requirement. Note also that some documents have blank pages. Just click on "Next Page" if that happens.
Previous Page    Next Page Go to page number Note: Page number may not agree with index page numbers


Previous Page    Next Page
Go to page number
Note: Page number may not agree with index page numbers

PDF to Text.

DSM400
Digital Sounder
Module

Installation Guide
Trademarks and registered trademarks
Autohelm, HSB, RayTech Navigator, Sail Pilot, SeaTalk and Sportpi-
lot are UK registered trademarks of Raymarine UK Limited.
Pathfinder and Raymarine are UK registered trademarks of Rayma-
rine Holdings Limited. 45STV, 60STV, AST, Autoadapt, Auto GST,
AutoSeastate, AutoTrim, Bidata, G-Series, HDFI, LifeTag, Marine
Intelligence, Maxiview, On Board, Raychart, Raynav, Raypilot, Ray-
Talk, Raystar, ST40, ST60+, Seaclutter, Smart Route, Tridata and
Waypoint Navigation are trademarks of Raymarine UK Limited.
All other product names are trademarks or registered trademarks of
their respective owners.

 Raymarine UK Ltd. 2008




Document number: 87092-2
Date: November 2008
Contents
Contents ..................................................... 3                       Non-Diplexed transducer cables................... 19
Safety notices ............................................. 5                     Custom transducer configurations...................... 19
                                                                                   Ultrasonic speed/temperature transducer .......... 21
Important information.................................. 7
                                                                                   DC power connection ......................................... 21
    Introduction ...........................................................7
    Intended use .........................................................7        Ground connection ............................................. 22
    EMC conformance ................................................7                  Power input cable ......................................... 22
    Declaration of conformity ......................................7                  Transducer cable .......................................... 22
    WEEE Directive ....................................................7           Display connection ............................................. 23
    RoHS Directive .....................................................7              Connecting to an E-Series display................ 23
    Conventions..........................................................8             Connecting to multiple E-Series displays ..... 24
    Warranty ...............................................................8          Connecting to a G-Series system ................. 24
    Handbook .............................................................8     Maintenance and troubleshooting ............ 25
Installation .................................................. 9                  Introduction......................................................... 25
    Introduction ...........................................................9      Maintenance ....................................................... 25
    EMC installation guidelines...................................9                    EMC servicing and safety guidelines............ 25
    Cable suppression ferrites ..................................10                    Routine checks ............................................. 26
                                                                                       Cleaning........................................................ 26
    Planning the installation......................................12
        Location of the sounder module....................12                       Resetting the system .......................................... 27
    What's in the box ................................................13           Troubleshooting.................................................. 28
                                                                                       Common problems and their solutions ......... 28
    Installing the unit.................................................13
                                                                                   DSM400 Thermocline Troubleshooting .............. 29
    Cable runs ..........................................................14
                                                                                       Thermocline Troubleshooting ....................... 29
        Power cable ..................................................15
        Transducer cable ..........................................15              Warnings and errors ........................................... 30
                                                                                   Contacting Raymarine ........................................ 31
System and transducer connections ........ 17                                          Using the website ......................................... 31
    Introduction .........................................................17           In the US....................................................... 31
    Unit connections .................................................17               Worldwide ..................................................... 32
    Transducer connections .....................................18                     In Europe ...................................................... 32


                                                                                                                                                              3
Specifications ........................................... 35
    General............................................................... 35
    Features ............................................................. 36




4
Safety notices                                  Warning: Sources of ignition
                                                This equipment MUST NOT be installed
     Warning: Product installation
                                                in hazardous/flammable atmospheres
     This equipment must be installed and       such as an engine room.
     operated in accordance with the
     Raymarine instructions provided.           Warning: Transducer cable
     Failure to do so could result in poor
                                                Removing the transducer cable(s) from
     product performance, personal injury,
                                                the unit while powered ON can cause
     and/or damage to your boat.
                                                sparks. Only remove a transducer
                                                cable after the unit has been powered
     Warning: High voltage
                                                OFF.
     This equipment contains high voltages.
     DO NOT remove the covers or access         Warning: Operation
     internal components unless instructed      NEVER operate the sounder with the
     to do so within the product handbook.      boat out of the water.
     NEVER remove the DSM400 cover when         NEVER touch the transducer face when
     power is connected.                        the sounder is powered on.
                                                SWITCH OFF the sounder if divers are
     Warning: Power supply
                                                likely to be within 25 ft (5 m) of the
     Make sure the boat's power supply is set   transducer.
     to OFF before starting to install this
     product. Unless stated otherwise only      Caution: Mounting the unit
     connect or disconnect this equipment       Due to the weight of the unit, it must be
     with the power supply set to OFF.          mounted using the bolts supplied. DO
                                                NOT use self-tapping screws as these
     Warning: Heavy object                      will not support the weight.
     The DSM400 Digital Sounder Module
     weighs 27 lbs (12.25 kg). Ensure that      Caution: Service and
     the chosen location for the unit is able   Maintenance
     to support the weight.                     This product contains no user service-
     Take care when lifting or moving the       able parts.
     unit.



                                                                                            5
6   Raymarine DSM400 Digital Sounder Module
Important information
Introduction                                                            The original Declaration of Conformity certificate may be viewed
                                                                        on the relevant product page at www.raymarine.com
Your Raymarine DSM400 is a 'black box'
digital sounder module that provides full
function fishfinding and sonar capabilities
                                                                        WEEE Directive
to Raymarine E-Series and G-Series                                                 The Waste Electrical and Electronic Equipment (WEEE)
systems.                                                                           Directive requires the recycling of waste electrical and
                                                                                   electronic equipment. Whilst the WEEE Directive does
                                                                                   not apply to some Raymarine products, we support its
Intended use                                                 D1
                                                               096
                                                                  7-1
                                                                                   policy and ask you to be aware of how to dispose of this
                                                                        product.
The intended use for your Raymarine DSM400 Digital Sounder
                                                                        The crossed out wheelie bin symbol, illustrated above, and
Module is for leisure marine boats and workboats not covered by
                                                                        found on our products, signifies that this product should not be
International Maritime Organisation (IMO) and Safety of Life at
                                                                        disposed of in general waste or landfill.
Sea (SOLAS) Carriage Regulations.
                                                                        Please contact your local dealer, national distributor or
                                                                        Raymarine Technical Services for information on product
EMC conformance                                                         disposal.
All Raymarine equipment and accessories are designed to the
best industry standards for use in the leisure marine market.
                                                                        RoHS Directive
The design and manufacture of Raymarine equipment and                                  This product uses components that comply with the
                                                                                       Restriction of the use of certain Hazardous
accessories conform to the appropriate Electromagnetic                     RoHS
Compatibility (EMC) standards, but correct installation is
                                                                           COMPLIANT   Substances (RoHS) Directive 2002/95/EC.
required to ensure that performance is not compromised.

Declaration of conformity
Raymarine plc declare that the DSM400 Digital Sounder Module
is in compliance with the essential requirements of EMC
Directive 2004/108/EC.


                                                                                                                                           7
Conventions
Within this handbook the following conventions are used:


                 This symbol indicates a hint or tip.



                 This symbol indicates a note.



Warranty
To register your Raymarine DSM400 Digital Sounder Module
ownership, please take a few minutes to fill out the warranty
registration card found in the box, or visit www.raymarine.com
and register on-line.
It is important that you register your product to receive full
warranty benefits. Your unit package includes a barcode label
indicating the serial number of the unit. You should stick this
label to the warranty registration card.

Handbook
To the best of our knowledge, the information in this handbook
was correct as it went to press. However, Raymarine cannot
accept liability for any inaccuracies or omissions it may contain.
In addition, our policy of continuous product improvement may
change specifications without notice. As a result, Raymarine
cannot accept liability for any differences between the product
and the handbook.




8                                                                    Raymarine DSM400 Digital Sounder Module
                                                                                                                          1
Chapter 1: Installation
1.1 Introduction
This chapter deals with the installation of the DSM400       Their design and manufacture conforms to the
Digital Sounder Module and covers the following:             appropriate Electromagnetic Compatibility (EMC)
                                                             standards, but correct installation is required to ensure
     EMC installation                 - refer to page 9     that performance is not compromised. Although every
      guidelines                                             effort has been taken to ensure that they will perform
                                                             under all conditions. It is important to understand what
     Planning the installation        - refer to            factors could affect the operation of the equipment.
                                       page 12               The guidelines given here describe the conditions for
                                                             optimum EMC performance, but it is recognized that it
     What's in the box                - refer to
                                                             may not be possible to meet all of these conditions in all
                                       page 13
                                                             situations. To ensure the best possible conditions for
     Installing the unit              - refer to            EMC performance within the constraints imposed by any
                                       page 13               location, always ensure the maximum separation
                                                             possible between different items of electrical equipment.
     Cable runs                       - refer to               Place equipment at least 5ft (1.5 m) from any
                                       page 14                   equipment transmitting or cables carrying radio
     Extending cables                 - refer to                signals, e.g. VHF radios, cables and antennas. In
                                       page 15                   the case of SSB radios, the distance should be
                                                                 increased to 7ft (2 m).
Connections to the unit are dealt with in "System and           Place equipment more than 7ft (2 m) from the path
transducer connections" on page 17.                              of a radar beam. A radar beam can normally be
                                                                 assumed to spread 20 degrees above and below
                                                                 the radiating element.
1.2 EMC installation guidelines
                                                                The equipment is supplied from a separate battery
All Raymarine equipment and accessories are designed             from that used for engine start. Voltage drops below
to the best industry standards for use in the recreational       10 V and starter motor transients can cause the
marine environment.                                              equipment to reset. This will not damage the


     Installation                                                                                                         9
     equipment, but may cause the loss of some information and
     may change the operating mode.
    Cables are not cut or extended unless doing so is detailed
     in the installation manual.

Remember
Where constraints on the installation prevent any of the above
recommendations:
    Always allow the maximum separation possible between
     different items of electrical equipment. This will provide the
     best conditions for EMC performance for the installation.

1.3 Cable suppression ferrites
The DSM400 is supplied with a pack of suppression ferrites.
These must be fitted correctly to ensure optimum EMC perfor-
mance and to comply with applicable EMC regulations.
Fit the ferrites to the cables supplied as shown overleaf.
Additional cables and ferrites
Additional cables fitted to the system will also require ferrites.
Use only ferrites of the correct type, supplied by Raymarine
authorized dealers.
Connection to other equipment
If Raymarine equipment is to be connected to other equipment
using a cable not supplied by Raymarine, a Raymarine suppres-
sion ferrite MUST always be attached to the cable in a position
near the Raymarine unit.




10                                                                    Raymarine DSM400 Digital Sounder Module
Cable suppression ferrite pack installation



                                                                                                                               DSM400




                                                                                                   70 mm (2.76 in)
                                                                                                                     Cable tie

                                                                                                                     Ferrite

                                                                                                                     Cable tie




                                                                                                                     Cable clip




     Ethernet            Power           Speed/Temp             Transducer 1        Transducer 2                                        D11046-1




 Note: Cable ties are not required for the Transducer 1 or Transducer 2 ferrites.




  Installation                                                                                                                                     11
1.4 Planning the installation                                 Location of the sounder module

            Warning: Product installation                     The unit should be mounted where it will be:
            This equipment must be installed in                  protected from physical damage and excessive vibration.
            accordance with the instructions contained in        protected from prolonged exposure to rain, salt spray and
            this handbook. Failure to do so may result in         direct sunlight.
            poor product performance, personal injury,           well ventilated.
            and/or damage to the boat.
                                                                 as close to the transducer as possible.
            Warning: Sources of ignition                      When choosing a location for the sounder module, consider the
            This equipment must NOT be installed or used      following points to ensure reliable and trouble free operation.
            in hazardous/flammable atmospheres such as           Access - there must be sufficient space below the unit to
            an engine room.                                       enable cable connections to the unit, avoiding tight bends.
                                                                 Interference - the unit should be mounted far enough away
            Warning: Heavy object
                                                                  from any device that may cause interference such as
            The DSM400 Digital Sounder Module weighs 27           motors, generators and radio transmitters/receivers. See
            lbs (12.25 kg). Ensure that the chosen location       "EMC installation guidelines" on page 9.
            for the unit is able to support the weight.
                                                                 Magnetic compass - mount the unit at least 3 ft. (1 m)
            Take care when lifting or moving the unit.
                                                                  away from a magnetic compass.
            Caution: Mounting the unit                           Vertical surface - the unit must be mounted in an upright
            Due to the weight of the unit, it must be             position.
            mounted using the bolts supplied. DO NOT use
            self-tapping screws as these will not support     DO NOT mount the unit:
            the weight.
                                                                 in an engine room.
                                                                 on the main console.
Before installing the unit, consider the following:
                                                                 on a horizontal surface
    Location of the sounder module.
    Cable runs.
    Transducer selection.


12                                                                                   Raymarine DSM400 Digital Sounder Module
1.5 What's in the box                                                              1.6 Installing the unit
Unpack the unit and associated components carefully to prevent
damage. Save the box and packing in case the unit needs to be                      Having selected a suitable location, install the unit using the
returned for service.                                                              supplied hardware.

Check that all the correct system components are included as                       To install the unit:
shown in the drawing below.
                                                                                   1. Using tape, secure the mounting template in the required
                                                                                      location.
                      DSM400



                                                                                                                      DSM
                                                                                                                         40
                                                                                                                           0m
                                                                                                                             ou
                                                                                                                               ntin
                                                                                                                                      g te
                                                                                                                                          mpl
                                                                                                                                              ate



                                                                                                          34
                                                                                                             mm
                                                                                                         (1.3
                                                                                                              4 in)




                                                                                                                                                    UP




                                                             Manual

                                                                                                         33
                                                                                                            mm
                                                                                                         (1.3
                                                                                                              in)




                                                                                                                                                                                                    34
                                                                                                                                                                                                       mm
                                                                                                                                                                                                   (1.3
                                                                                                                                                                                                        4 in)




                                                                                                                                                                      398
                                                                                                                                                                            mm
                                                                                                                                                                                 (15
                                                                                                                                                                                       .67
                                                                                                                                                                                             in)



                                                                                                                                                                      415
                                                                                                                                                                            mm
                                                                                                                                                                                 (16
                                                                                                                                                                                       .34
                                                                                                                                                                                             in)




                                                                                                                                                         306
                                                                                                                                                             .5
                                                                                                                                                         (12 mm
                                                                                                                                                            .06
                                                                                                                                                                in)




                                                                                                                                                                                                    33
                                                                                                                                                                                                       mm
                                                                                                                                                                                                   (1.3
                                                                                                                                                                                                        0 in)




                                                                                                                                                                                                                D10979-1
     Screw,       Plain washer,   Spring washer,    Nut,   Self tapper screw,
 M6 x 60mm (x8)      M6 (x8)         M6 (x8)       M6 (x8)     No.12 (x8)
                                                                        D10978-1

                                                                                   2. Drill a 9/64" pilot hole at each of the eight marked locations
                                                                                      on the template.
            Not all cable glands are supplied fitted to the unit as shown
            above, but will be found loose in the components bag.




   Installation                                                                                                                                                                                                            13
                                                                        Drill 9/64" pilot hole
                                                                        in 8 positions                                                                                             6
                            DSM
                               40
                                 0m
                                   ou
                                     ntin
                                         g te
                                             mpl
                                                ate



                 34
                    mm
                (1.3
                    4 in)




                                                      UP




                33
                   mm
                (1.3
                     in)




                                                                                                      34
                                                                                                         mm
                                                                                                     (1.3
                                                                                                         4 in)




                                                                           398
                                                                                 mm
                                                                                      (15
                                                                                         .67
                                                                                               in)



                                                                           415
                                                                                 mm
                                                                                      (16
                                                                                         .34
                                                                                               in)




                                                           306
                                                              .5
                                                           (12 mm
                                                              .06
                                                                  in)
                                                                                                                                                                                   4

                                                                                                      33
                                                                                                         mm
                                                                                                     (1.3
                                                                                                         0 in)




                                                                                                                                                DSM
                                                                                                                                                   400
                                                                                                                                                       SOU
                                                                                                                                                          ND
                                                                                                                                                            ER
                                                                                                                                                                 MO
                                                                                                                                                                   DU
                                                                                                                                                                     LE            5

                                                                                                                 D10980-1
          Unit MUST be mounted in an upright position
                                                                                                                                                                                        4

          For fiberglass mountings, countersink each of the pilot
          holes to prevent damage to the gelcoat when driving in the
          bolts.                                                                                                                                                                       D10987-1


                                                                                                                            6. Tighten the bolts to secure the unit in position.
3. Fix the mounting bolts into the eight holes.
4. Place the unit onto the mounting bolts.
5. Press the module downwards to engage the key slots in the
                                                                                                                            1.7 Cable runs
   unit.
                                                                                                                            Before installing the system cables, consider the following
                                                                                                                            points:
                                                                                                                               Power, transducer and network cables need to be attached
                                                                                                                                to the unit.



14                                                                                                                                                Raymarine DSM400 Digital Sounder Module
    Cables should be adequately secured, protected from
     physical damage, and protected from exposure to heat.                     1. The figures assume a constant current of 7A,
                                                                                  regardless of input voltage.
    Avoid running cables through bilges or doorways, or close
     to moving or hot objects.                                                 2. Cable length is the distance between the power source
                                                                                  and the unit.
    Avoid sharp bends.                                                        3. These wire sizes give a total drop of about 0.5 V
    Use a watertight feed-through wherever a cable passes                        between the power source and the unit, achieving a
     through an exposed bulkhead or deckhead.                                     minimum voltage at the unit of 10.5 V with a fully flat
                                                                                  battery at 11V.
    Secure cables in place using tie-wraps or lacing twine. Coil
     any extra cable and tie it out of the way.
                                                                    Transducer cable
Power cable                                                         Raymarine does not recommend extending the transducer
The power cable should be run as a single length of cable from      cable. However, if this is unavoidable contact your local dealer
the unit to the boat's battery/distribution panel.                  for assistance.
Please refer to the following table to ensure that the correct
gauge of cable is used for the required cable length.

          Cable length                       Wire size

      Feet           Metres           AWG                mm2

       10                3              14               2.1

       15              4.6              14               2.1

       20                6              12               3.3

       25              7.6              12               3.3

       30                9              10               5.3




    Installation                                                                                                                        15
16   Raymarine DSM400 Digital Sounder Module
                                                                                                                                   2
Chapter 2: System and transducer connections
2.1 Introduction
This chapter deals with connecting the DSM400 Digital                            Ultrasonic speed/depth      - refer to page 21
Sounder Module to the system and transducers to the                               transducer
unit and covers:
                                                                                 DC power connection         - refer to page 21
    Unit connections                - refer to page 17                          Grounding the display       - refer to page 22
    Transducer connections          - refer to page 18                          Connecting to a display     - refer to page 23
    Custom transducer               - refer to page 19
     configuration



2.2 Unit connections
The unit connectors are located at the base of the unit as shown below:


                               Ethernet            Speed/Temp
                                          Power                Transducer 1            Transducer 2




                                           POWER      SPEED/TEMP   TRANSDUCER 1           TRANSDUCER 2




                                                                                                            D10981-1


System and transducer connections                                                                                                  17
2.3 Transducer connections
           WARNING: Transducer cable
           Removing the transducer cable(s) from the unit while powered ON can cause sparks. Only remove a
           transducer cable after the unit has been powered OFF.

The following diagram shows the layout of the transducer connections within your DSM400 Digital Sounder Module:

                    CUSTOM CONFIG.
                     TRANSDUCER 2 HIGH
                                                                                             Watertight bungs supplied with your unit
                                                                                            should be fitted to any unused connectors
                     TRANSDUCER 2 LOW             2
                     TRANSDUCER 1 HIGH                                                                                                                                                                          Earth/
                     TRANSDUCER 1 LOW                                                                                                                                                                           Ground
                                                                                                               1
                                         Screen




                                                                                                               Screen




                                                                                                                                        Screen




                                                                                                                                                                                                     Screen




                                                                                                                                                                                                                                  Screen
                                                                           Screen + Brown




                                                                                                                                                               Screen + Brown
                                                          Screen + Brown




                                                                                                                                                  Yellow




                                                                                                                                                                                                                                             Yellow
                                                  Black




                                                                                                      Black




                                                                                                                               Black




                                                                                                                                                                                           Black




                                                                                                                                                                                                                         Black
                                                                                                                        Blue




                                                                                                                                                                                                              Blue
                                Red




                           4                                   3




                                                                                            Orange




                                                                                                                                                                                Orange
                                      POWER                                                          TRANSDUCER 1 HIGH TRANSDUCER 1 LOW                                                   TRANSDUCER 2 HIGH          TRANSDUCER 2 LOW


                                                          Green




                                                                                            White




                                                                                                                                                                                White
                                                          White
                                      GROUND                                                                  SHIELD                   SHIELD                                                      SHIELD                        SHIELD




                                                          Red
                                                          Br Gr Wh Re       G               T Id                                                              G                T Id




                                                                                                                                                           5




                                                                                              Speed
                                                                                              Transducer                                         Depth 1                                      Depth 2                                      D10982-2




18                                                                                                                                                                                      Raymarine DSM400 Digital Sounder Module
The numbers within the drawing refer to the detailed illustrations within this chapter.
Note: Only one temperature wire should be connected. (To
      either the speed/temperature or non-diplexed transducer                                         Bundle                             Function
      input as appropriate.)
                                                                                                      Blue/black/shield                  High frequency +/-/shield
Non-Diplexed transducer cables
                                                                                                      Yellow/black-and-white/shield      Low frequency+/-/shield
Non-Diplexed transducer cables contain wires bundled as
detailed and should be connected within the sounder module as                                         Brown/white/shield                 Ground/temp/ground
shown in the following diagram:
:
                                                                                                      Orange/shield                      Transducer ID/Ground

                                     1                                                               The overall screen must be connected to the unit earth bolt
                                                        Screen




                                                                                 Screen
                    Screen + Brown




                                                                                           Yellow
                                                                                                     using the ground spur cable supplied - refer to "Ground
                                               Black




                                                                        Black
                                                                 Blue
                                                                                                     connection" on page 22.
                                     Orange




                                              TRANSDUCER 1 HIGH TRANSDUCER 1 LOW
                                     White




                                                       SHIELD                   SHIELD



                     G               T Id                                                           2.4 Custom transducer configurations
                                                                                                     If the cable connections for the transducer you are using with
                                                                                                     your DSM400 do not include an `Orange ID' wire, you will need
                                                                                                     to configure the sounder unit manually to match the power and
                                                                                                     frequency of the transducer. To do this, use one of the four
                                                                                                     override rotary switches located on the left of the sounder unit
                                                                                                     printed circuit board (PCB).



                                                                                                                           2
                                                                                                                                CUSTOM CONFIG.
                                                                                                                                 TRANSDUCER 2 HIGH

                                                                                                                                 TRANSDUCER 2 LOW

                                                                                                                                 TRANSDUCER 1 HIGH
                                                                                          D10988-1                               TRANSDUCER 1 LOW
                                                                                                                                                     D10990-1




    System and transducer connections                                                                                                                                19
It is important that when you make a manual override to the
configuration settings, make sure that you match the power and       High Frequency                  Low Frequency
frequency settings exactly or you may damage the transducer.
                                                                 0   Override OFF (use Orange        Override OFF (use Orange
The rotary switches have the following settings:                     ID)                             ID)

                                                                 1   Disconnected (use Orange        Disconnected (use Orange
                                                                     ID cable, but channel is dis-   ID cable, but channel is dis-
                                                                     connected)                      connected)

                                                                 2   Reserved                        Reserved

                                                                 3   Reserved                        Reserved

                                                                 4   200 KHz/ 100 W                  50 KHz/ 600 W

                                                                 5   200 KHz/ 300 W                  50 KHz/ 1 kW

                                                                 6   200 KHz/ 600 W                  50 KHz/ 2 kW

                                                                 7   200 KHz/ 1 kW                   50 KHz/ 3 kW

                                                                 8   200 KHz/ 2 kW                   38 KHz/ 600 W

                                                                 9   185 KHz/ 100 W                  38 KHz/ 1 kW

                                                                 A   185 KHz/ 300 W                  38 KHz/ 2 kW

                                                                 B   185 KHz/ 600 W                  38 KHz/ 3 kW

                                                                 C   185 KHz/ 1 kW                   28 KHz/ 600 W

                                                                 D   185 KHz/ 2 kW                   28 KHz/ 1 kW

                                                                 E   Reserved                        28 KHz/ 2 kW

                                                                 F   Reserved                        28 KHz/ 3 kW



20                                                                                  Raymarine DSM400 Digital Sounder Module
2.5 Ultrasonic speed/temperature trans-                             2.6 DC power connection
ducer
If you are installing a separate ultrasonic speed/temperature                  WARNING: Power supply
transducer, you should connect it to the sounder unit as shown                 Make sure the boat's power supply is set to OFF
in the following diagram:                                                      before starting to install this product. Unless
                                                                               stated otherwise only connect or disconnect
                     3                                                         this equipment with the power supply set to
                                                                               OFF.




                         Screen + Brown




                                          Screen + Brown
                                                                    Your DSM400 Digital Sounder Module is intended for use on DC


                         Green




                                                           Orange
                         White



                                                           White
                         Red
                                                                    power systems rated from 10.7 V to 32V.
                          Br Gr Wh Re      G               T Id
                                                                    The power connection to the sounder unit should be made at
                                                                    either the output of the battery isolator switch or at a DC power
                                                                    distribution panel. Power should be fed directly to the sounder
                                                                    unit on a dedicated cable system and protected by a 5 amp
                                                                    thermal circuit breaker or quick-blow 10 amp fuse installed in the
                                                                    red ((positive) wire. The thermal circuit breaker or fuse should be
                                                                    connected as close to the power connection as possible.
                                                                    There is no power switch on your sounder unit. The unit is
                                                                    powered when the power cord is attached to the boat's power
                                                                    Locate the unit so that the power cord can be accessed and
                                                                    removed easily if necessary. If this is not possible, Raymarine
                                                                    strongly recommend that an ON/OFF switch is installed in the
                                                                    power cord where it can be easily accessed.
                                                                    The DC power connections are shown in the following drawing:
 Red                                    Positive

 White                                  Temperature

 Green                                  Speed signal

 Screen and brown                       Negative


System and transducer connections                                                                                                     21
                                                              2.7 Ground connection
            4
                                                              Power input cable




                         Screen
                                  Black
                  Red
                                                              Your DSM400 Digital Sounder Module is designed for use on
                        POWER
                        GROUND                                boat's with a `negative' ground system and is not intended for
                                                              use on boat's with a `positive' ground system.
                                          Br Wh Gr
                                                              It is important that an effective RF ground is connected to the
                                                              system. A single ground point should be used for all equipment.
                                                              You can ground the sounder unit by connecting the drain wire
                                                              (shield) of the power input cable to the boat's RF ground.
                                                              If you need to extend the wire, the extension wire should be an 8
                                                              mm braid or AWG 10 multi-stranded cable. If your boat does not
                                                              have and RF system, connect the drain wire to the negative
                                                              battery terminal.
                                                              The boat's DC power system should be either:
                                                                 Negative ground, with the negative battery terminal
                                                                  connected to the boat's ground, or,
                                                                 Floating, with neither battery terminal connected to the
                                                 D10992-2




                                                                  boat's ground.

                                                              Transducer cable
 Terminal       Function                      Color           To ensure an efficient ground for the transducer cable(s) you
                                                              should carry out the following:
 +              Battery positive              Red
                                                              1. Gather the external shield wires from the transducer cable(s)
 Ground         Shield (drain wire)           No insulation      and twist the free ends together.
 -              Battery negative              Black           2. Insert these twisted ends into the connector of the ground
                                                                 spur.
                                                              3. Using a suitable tool, crimp the twisted ends into the ground
                                                                 spur connector.


22                                                                                Raymarine DSM400 Digital Sounder Module
4. Attach the ground spur to the ground screw on the body of           Connections for both E-Series and G-Series displays are shown
   the sounder unit.                                                   in the following diagrams:

                                                                       Connecting to an E-Series display

                                                                                 DSM400                                                        GPS
                                                                                                         E series display                     antenna
                                                                                                                                       PAGE


                                                                                                                            ACTIVE

                                                                                                                                       WPTS
                                                                                                                                       MOB

                                                                                                                            DATA


                                                                                                                                      MENU




                                                                                                                                      OUT
                                                                                                                                     RANGE
                                                                                                                                      IN




                                                                                                                            OK       CANCEL




                                                                                          Power




                                                                                                                                                D10983-1

                                                            D10994-1




2.8 Display connection
Your DSM400 Digital Sounder Module can be connected to
either E-Series or G-Series display units.
How you configure the sounder module depends on the type of
display to which it is going to be connected. Full details will be
found in the relevant documentation for your display.



System and transducer connections                                                                                                                    23
Connecting to multiple E-Series displays                                                              Connecting to a G-Series system

        DSM400                                                                             GPS         GPM 400 (Central processor)
                                          E series display                                antenna
                                                                                   PAGE


                                                                  ACTIVE

                                                                                   WPTS
                                                                                   MOB

                                                                    DATA


                                                                                  MENU




                                                                                                                                      SeaTalkhs switch
                                                                                                                                                            DSM digital sounder
                                                                                  OUT
                                                                                 RANGE
                                                                                  IN




                                                                  OK             CANCEL




                                                                                                                                                                   C/lines for plugs/sockets




                  Power                                                                                                   SeaTalkhs


                                          E series display                                                                                           SeaTalkhs
                                                                                                                                                                   Transducer
                                                                            PAGE


                                                             ACTIVE

                                                                            WPTS
                                                                            MOB




           SeaTalkhs switch                                  DATA


                                                                           MENU
                                                                                                                                                                                               DXXXXX-1


                                                                           OUT
                                                                       RANGE
                                                                           IN




                                                             OK        CANCEL




      SeaTalkhs           SeaTalkhs

      SeaTalkhs               SeaTalkhs
                                                                                           D10984-1




24                                                                                                                           Raymarine DSM400 Digital Sounder Module
                                                                                                                         3
Chapter 3: Maintenance and troubleshooting
3.1 Introduction                                            3.2 Maintenance
This chapter deals with maintenance and
troubleshooting for the DSM400 Digital Sounder Module,                 WARNING: High voltage
and covers the following:                                              This equipment contains high voltages.
                                                                       Unless otherwise instructed in this
     Maintenance                      - refer to page 25              handbook DO NOT remove the covers or
                                                                       access internal components.
     Resetting the system             - refer to page 27
                                                                       CAUTION: Service and Maintenance
     Troubleshooting                  - refer to page 28              This product contains no user
                                                                       serviceable parts.
     Warnings and errors              - refer to page 30

     Thermocline troubleshooting      - refer to page 29   EMC servicing and safety guidelines
                                                               Raymarine equipment should be serviced only by
     Contacting Raymarine             - refer to page 31
                                                                authorized Raymarine service technicians. They will
                                                                ensure that service procedures and replacement
Adjustments to this equipment requires specialized              parts used will not affect performance. Raymarine
service procedures and tools only available to qualified        products do not contain any user serviceable parts.
service technicians. There are no user serviceable parts
                                                               Some products generate high voltages. Never
or adjustments.
                                                                handle cables or connectors when power is being
                                                                supplied to the equipment.
                                                                When powered all electrical equipment produces
                                                                electromagnetic fields. These can cause adjacent
                                                                items of electrical equipment to interact with one
                                                                another, with consequent adverse effects on
                                                                operation. To minimize these effects and enable
                                                                best possible performance from the equipment
                                                                guidelines are given in the installation instructions,
                                                                to ensure minimum interaction between different

Maintenance and troubleshooting                                                                                          25
     items of equipment, i.e. ensure optimum Electromagnetic         prevent the build-up of sea growth, coat the transducer with a
     Compatibility (EMC).                                            thin layer of paint.
    Always report any EMC related problem to a Raymarine            Use only water-based antifouling paint, or a water-based paint
     dealer. Such information is used to improve quality             specifically designed for transducers. Apply the paint with a
     standards.                                                      brush.
    In some instances it may not be possible to prevent the         If the transducer becomes fouled or stops working because of
     equipment from being affected by external influences. In        sea growth or sand, use a stiff brush to clean it. The surface can
     general this will not damage the equipment but can lead to      also be sanded with a fine-grit wet or dry sandpaper (#320 grade
     spurious resetting action, or may result in momentary faulty    or finer), but this will affect the performance of the unit when the
     operation                                                       boat is moving at higher speeds.
Routine checks                                                       The paddle wheel mechanism may become jammed by dirt, grit
The DSM400 Digital Sounder Module is a sealed unit.                  or barnacles. Work the contaminant out of the mechanism, then
Maintenance is therefore limited to the following periodic checks:   clean the unit with soap and water or IPA.
    Examine all of the cables for signs of damage, such as          Cleaning the hull
     chafing, cuts or nicks.
                                                                     Take care when cleaning the outside of the hull near the
    Check that all cable connectors are firmly attached.            transducer as harsh cleaning solvents such as acetone may
Cleaning                                                             damage the transducer.

Cleaning the unit
The sounder module is a sealed unit and does not require
regular cleaning. If it necessary to clean the unit, follow these
basic procedures:
    Ensure the power is set to OFF.
    Wipe the module using a damp cloth.
    If necessary, use isopropyl alcohol (IPA) or a mild detergent
     to remove grease marks.

Cleaning the transducer
Sea growth can collect quickly on the bottom of the transducer
which can reduce its performance in just a few weeks. To

26                                                                                        Raymarine DSM400 Digital Sounder Module
3.3 Resetting the system
Using the reset function will return your DSM400 Digital Sounder
Unit to its factory default values. The reset function also clears
any sonar depth offset and speed and temperature calibrations
that have been set.

To perform a factory reset:
1. On the display, make the Fishfinder window active.
2.   Press Menu.
3.   Select Fishfinder Setup.
4.   Select DSM Settings.
5.   Select DSM Reset.
6.   The message Reset DSM? appears.
7.   To confirm the reset, select soft key YES, or press OK.
      DSM powers OFF and ON, the LED will go from blinking
     green to solid orange (1 sec.)., the System Data Alarm will
     sound showing that connection to the DSM is lost.
8. Press the ACKNOWLEDGE soft key.
   After approximately 10 seconds the DSM will re-acquire
   data.
9. To complete the reset, read the warning and press OK.

To cancel the reset, either:
Before pressing YES (Step 7 above), either, press NO softkey,
or, CLEAR button. The screen changes to show the Fishfinder
DSM Settings.
Press CANCEL three times to return to the fishfinder
application.



Maintenance and troubleshooting                                      27
3.4 Troubleshooting                                                             table to identify the most likely cause and the corrective action
                                                                                required to restore normal operation.
All Raymarine products are, prior to packing and shipping,
subject to comprehensive test and quality assurance programs.                   If there is still a problem after referring to the table, contact your
However, if the unit develops a fault please refer to the following             local Raymarine dealer, national service agent or Raymarine
                                                                                Technical Services for further advice. Always quote the product
                                                                                serial number which can be found on the back of the unit.

Common problems and their solutions

                       Problem                                                                         Solution

 Display freezes                                   1. Check that the scroll speed is not set to zero.
                                                   2. Check the transducer cable for damage. If damaged the cable and transducer must be replaced as a
                                                      unit.

 Sounder does not display fish                     1. Fish arches are not displayed if the boat has stopped - fish will appear on the display as a straight line.
                                                   2. Ensure the transducer is within 10 degrees of vertical.
                                                   3. Check that the gain is not set too low.

 Sounder does not see bottom or fish               1.   Check that the gain is not set too low.
                                                   2.   Ensure the transducer is within 10 degrees of vertical.
                                                   3.   Check that the transducer face is not covered or fouled - If necessary clean the transducer.
                                                   4.   Check the voltage from the power source. If it is too low it can affect the transmitting power of the
                                                        sounder.

 Sounder displays a lot of background noise        1. Check that the gain is not set too high.
                                                   2. Check that the transducer is mounted correctly and is clean.

 Sounder temperature readings are wrong            If necessary, adjust the TEMP CALIBRATE parameter.

 Sonar display is unreliable at high boat speeds   Turbulence around the transducer may be confusing the unit. Check the transducer location.




28                                                                                                         Raymarine DSM400 Digital Sounder Module
3.5 DSM400 Thermocline Troubleshooting                                                                                                     Thermocline
                                                                                                                                           A thermocline looks like a
                                                                                                                                           thick speckled band on the
Thermocline Troubleshooting                                                                                                                display. The debris and
                                                                                                                                           marine life found in the
This section describes how to troubleshoot incorrect depth                                                                                 thermocline cause the sonar
                                                                                                                                           to mis-interpret it as the
readings caused by "thermoclines" in certain areas of water.                                                                               bottom, giving inaccurate
                                                                                                                                           depth readings.
                                                                                               Zoomed Area
Thermocline Overview                                                                           The scale for this part of the
                                                                                               display is not relevant in
                                                                                               this particular example.
In temperature terms, oceans can be thought of in different
layers; a mixed layer and a colder deep layer, separated by a                                                                              Actual Bottom
                                                                                                                                           This is the actual bottom
thermocline layer, where there is an abrupt change in                                                                                      depth (2289 ft).
temperature. The thermocline attracts additional marine life and                                                                           False Depth Reading
small particles of debris, reducing the accuracy of fishfinder                                                                             The thermocline causes an




                                                                                                                                                                         D11152_1
                                                                                                                                           incorrect depth reading.
sonars, as shown below:
                                                                                            This problem occurs when fishfinder sonars (including the
                    0
                                                                                            DSM400) interpret the thermocline as the bottom of the seabed,
                                                                                            returning an incorrect depth reading. To overcome this problem,
                                                     ((((
                                 Depth Detected by                                          you must configure the DSM400 to operate in a different
                                 Sonar (1100 feet)
                                                            Mixed Layer                     frequency range, using your Raymarine Multi-Function Display.
                                                                                            This is described in the following procedures.
  Depth (feet)




                        Actual Depth
                                                     ((



                 1000
                        (2000 feet)
                                                                                            Using Low and High Frequencies
                                                            Thermocline
                                                                                            Before performing any of the procedures detailed on this page, it
                                                                                            is important to understand the difference between low and high
                                                            Deep Water
                                                                      D11138_1
                                                                                            frequencies. The DSM400 features both low and high frequency
                 2000
                                       Temperature                               D11138_1
                                                                                            transducers, enabling you to view low or high frequencies (or
                                                                                            both) in the fishfinder display. Low frequencies (less than 100
                                                                                            Khz) scan a wide area and penetrate water well, and are
                                                                                            suitable for displaying a large area below your boat, or in deep
                                                                                            water. High frequencies (100 to 200 Khz) scan a narrow area but
                                                                                            produce more detail, especially at high boat speeds. High
                                                                                            frequencies are well-suited to shallow waters up to 1000 feet.




Maintenance and troubleshooting                                                                                                                                              29
Achieving Accurate Sonar Readings                                                           If you are using the DSM400 at depths greater than 100 feet,
If you are using the DSM400 at depths of less than 100 feet,                                and displaying high frequencies only, the Range Shift function
thermoclines are always penetrated correctly by the sonar,                                  has no impact, as the high frequencies mean that it is less likely
providing accurate depth readings. If you are using the DSM400                              that a thermocline will be detected as a bottom in any range.
at depths greater than 100 feet, and displaying low frequencies                             However, in the event that a thermocline is mis-interpreted as
only:                                                                                       the bottom, you must adjust the fishfinder display to show low
                                                                                            frequencies only, and then use the Range Shift function to
                                                                                            penetrate the thermocline. This procedure is described in the
1. Press the RANGE IN or RANGE OUT button to open the                                       steps above.
   Range Adjust toolbar.
                                                                                            If you are using a combination of the low and high frequencies
2. Toggle the RANGE softkey to the MAN option.                                              (for example, using the split display function and/or one of the
3. Press OK.                                                                                dual-frequency preset modes), you may be able to see the
4. In the main fishfinder view, press the RANGE SHIFT softkey.                              bottom correctly by range-shifting the low frequency part of the
5. Using the rotary control, adjust the range so that the true sea                          display. If the correct bottom depth is not returned, you may
   bottom and the thermocline return are displayed. Continue to                             need to switch to low frequencies only, and then use the Range
   adjust the range until the thermocline is shifted off the top of                         Shift function to penetrate the thermocline, as described above.
   the screen, while the true bottom remains on the screen. The
   correct depth is then displayed, as shown in the following                               3.6 Warnings and errors
   diagram:
                                                                                            The status Light Emitting Diode (LED) on the top casing of the
                                                 Thermocline                                sounder module provides information on the status of the
                                                 Here, the bottom of the
                                                 thermocline can still be                   sounder module and notifies you of any problems within the unit.
                                                 seen, as it was range-shifted
                                                 to the top of the display.
                                                                                            The LED blinks the following colors:
                                                                                               Green - shows the unit is operating normally.
     Zoomed Area
     The scale for this part of the              Actual Bottom                                 Amber - warns of a problem in the unit.
     display is not relevant in                  This is the actual bottom
     this particular example.                    depth (2289 ft).                              Red - shows that there is an error in the unit.
                                                                                            The number of times the LED `blinks' is a code which represents
                                                                                            the errors or warnings shown in the table below. If there are
                                                 True Depth Reading
                                                 The DSM400 sonar has                       multiple warnings or errors, the codes are given in a sequence
                                                 penetrated the thermocline,
                                                 and is now displaying the                  with a 1.5 second pause between sequence strings.
                                                 correct depth reading.
                                                                                 D11151_1




30                                                                                                              Raymarine DSM400 Digital Sounder Module
For example, if the transducer sense fails and the network is not
detected, the LED blinks amber once, pauses 1.5 seconds,                       * After 30 seconds of no network activity, the
blinks amber twice 0.5 seconds apart, pauses 1.5 seconds and                   sounder unit enters Standby mode; No sonar pings
then repeats the sequence until the problems are resolved or up                are emitted and no warnings or errors are output on
to 10 minutes elapse.                                                          the Status LED. Instead the LED will blink GREEN
                                                                               once every 10 seconds.
                                                       Cleared
                 No. of
   Color
                 blinks
                                  Warning/error        every 10     3.7 Contacting Raymarine
                                                        mins
                                                                    Using the website
 Amber       Solid        DSM has rebooted            No
                                                                    For the latest information on Raymarine products visit the
 Amber       1            Transducer sense failure    No            website at www.raymarine.com.
                                                                    Click on the region that you are located in and go to the
 Amber       2            Network not detected *      No
                                                                    Customer Support page for links to:
 Amber       3            High temperature warning    Yes              Finding the location of the nearest factory service and
                                                                        authorized dealer for your area.
 Amber       4            Contact Raymarine
                                                                       Register Raymarine products.
 Amber       5            Contact Raymarine
                                                                       Accessing handbooks in Adobe Acrobat TM format.
 Amber       6            Contact Raymarine                            Downloading software updates.
 Amber       7            Contact Raymarine                            Accessing the Raymarine solution database.
                                                                    Click Find Answers to use the searchable solution database, or
 Amber       8            Contact Raymarine                         click Ask Raymarine to submit a question to Raymarine
                                                                    technical support staff. A reply will be sent by e-mail.
 Red         1            Contact Raymarine           Yes

 Red         2            Check Voltage Supply        Yes           In the US
 Red         3            Contact Raymarine                         Parts and accessories
 Red         4            Contact Raymarine                         Many Raymarine parts and accessories can be obtained from
                                                                    your local authorized Raymarine dealer.
 Red         5            Contact Raymarine

Maintenance and troubleshooting                                                                                                   31
However, if you are not able to obtain your requirements from      All products returned to the Repair Center are registered upon
the dealer, contact Raymarine Technical Services at:               receipt. Should you wish to enquire about the repair status of the
   1-603-881-5200 ext. 2333                                        unit, contact the Product Repair Center at:
Technical Service is available Monday through Friday 4.00AM to         1-603-881-5200 ext 2118
6.00PM Eastern Time.                                               Please have the unit serial number ready when you call. We will
Please have the Raymarine item or part number ready when           do everything possible to make the repair and return your unit as
calling if placing an order. If you are not sure which item is     quickly as possible.
appropriate for your unit, you should contact the Technical
Support Department to verify your requirements.                    Worldwide
                                                                   Please contact the authorized dealer in the relevant country as
Technical Support                                                  listed on the website at www.raymarine.com
For technical support, call:
    1-603-881-5200 ext 2444                                        In Europe
Raymarine Technical Support Specialists are available to           In Europe, Raymarine support, service and accessories may be
answer questions about installing, operating and troubleshooting   obtained from your authorized dealer or by contacting:
all Raymarine products.                                               Raymarine plc
                                                                      Anchorage Park
Product repair and service                                            Portsmouth
In the unlikely event that your Raymarine unit should develop a       Hampshire
problem, please contact your authorized Raymarine dealer for          England
assistance. The dealer is best equipped to handle your service        PO3 5TD
requirements and can offer timesaving help in getting the
equipment back into normal operation.                                 Tel: +44 (0) 23 9269 3611
In the event that repairs cannot be obtained locally, product         Fax: +44 (0) 23 9269 4642
service may also be obtained by returning the unit to:
   Raymarine Inc.                                                  Technical Support
   Product Repair Center
                                                                   Raymarine Technical Services Department handles enquiries
   21 Manchester Street
                                                                   concerning installation, operation, fault diagnosis and repair.
   Merrimack, NH03054-44821
The Product Repair Center is open Monday through Friday 8.15       To contact the Technical Helpdesk:
AM to 5.00 PM Eastern Time.                                           Tel; +44 (0) 23 9271 4713

32                                                                                     Raymarine DSM400 Digital Sounder Module
   Fax: +44 (0) 23 9266 1228

Parts and accessories
Raymarine parts and accessory items are available through your
authorized Raymarine dealer. Please refer to the lists of
component part numbers and optional accessories in the
Installation chapter of this handbook and have the numbers
ready when speaking with your dealer.
If you are uncertain about what item to choose for your
Raymarine unit, please contact the Customer Services
Department prior to placing an order.




Maintenance and troubleshooting                                  33
34   Raymarine DSM400 Digital Sounder Module
Appendix A: Specifications
General

Approvals
CE - conforms to      2004/108/EC (EMC)
                      EN60945:2002

Size                  16.36" x 12.07" x 4.92"
                      (415.5 x 306.6 x 125 mm)

Weight                27 lbs (12.25 kg)

Mounting              Eight keyholed mounting tabs, mounting bolts
                      Mount below decks, but not in engine compartment

Power
Voltage               12 or 24 V DC - nominal
                      10.7 - 32 V - absolute range
Current               8 A peak (pinging), 0.5 A idle
Fuse                  5A

Environmental
Waterproofing         Splash proof enclosure
Operating range       -10oC to + 50oC
Storage range
                      -20oC to +70oC
Humidity
                      up to 95% @ 35oC non-condensing

Connections           Power
                      2 x depth transducer 1
                      2 x depth transducer 2
                      Speed/temperature transducer
                      RJ-45 SeaTalk HS

                                                                         35
Features

 Output power               selected manually or automatically up to 2 KW RMS @ 185 KHz/200KHz
                            selected manually or automatically up to 3 KW @ 50/38/28 KHz
                            (depending upon connected transducers)

 Frequency                  28/ 38/ 50/ 185/ 200 KHz

 Pulse length               100  sec. up 4 msec.

 Maximum transmit rate      1580 pulses/min. @ 50' range

 Gain                       Auto or manual

 Range scales               36 (at 10,000ft/3 km using 28/38 KHz transponder of 3 kW)

 Range control              Auto, manual, range shift, dual range

 Zoom size                  x2, x3, x4, xR (User selectable)

 A-Scope                    Yes

 Bottom lock                Yes

 White line                 Yes

 Background color options   Classic-blue, classic-black, classic-white, sunburst, greyscale, copper, night vision

 Scroll speed               Selectable (0-100%)

 Variable range marker      Yes

 Alarms                     Anchor, arrival, battery, deep depth, MOB, off track, fish, shallow depth, temperature




36                                                                         Raymarine DSM400 Digital Sounder Module
Raymarine plc                 Raymarine Inc.
Anchorage Park, Portsmouth,   21 Manchester Street, Merrimack,
Hampshire PO3 5TD,            New Hampshire 03054-4801,
United Kingdom.               USA.

Tel: +44 (0) 23 9269 3611     Tel: +1 603.881.5200
Fax: +44 (0) 23 9269 4642     Fax: +1 603.864.4756
www.raymarine.com             www.raymarine.com


Ad by Google

Cookie Policy:
This webiste uses cookies to store settings on the weather pages so that you return to the same settings when you click the weather pages. This is necessary to save your setup information. There are also cookies used if you click the save location button.
Privacy Policy:
I do not sell or share any user data period. I do log page view information to monitor the health of the site and to block abusive actors. I also host ads from Google. They may or may not sell your data. Please adjust your account settings with them if you wich. This site does not fall under the terms of the CCPA or GDPR due to its size and target audiance.
Disclaimer:
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 L-36.com. 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 L-36.com 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.