Installing The Chartplotter - Raymarine Raychart 425 Owner's Handbook Manual

Chapter 5: Installation

5.4 Installing the Chartplotter

When planning the installation of your Raychart 425, the following
points should be considered to ensure reliable and trouble free operation:
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The dimensions of the unit, including the bracket, are shown in
Figure 5-4.
1. National Marine Electronics Association (NMEA) 0183 interconnection standard, Version 2.3
April 1998.
Convenience: The unit should be installed in a convenient position
where it can be viewed straight on or with a viewing angle of less than
35°. You may wish to apply power before you install the unit, to deter-
mine the best viewing angle prior to fixing. The mounting location
should be easily accessible to allow operation of the front panel con-
trols.
Access: There must be sufficient space behind the display unit to
allow cable connections to the rear panel connectors, avoiding tight
bends in the cable. At least 4cm should be allowed at the right of the
chartplotter to enable chart cards to be inserted and removed.
Interference: The selected location should be far enough away from
devices that may cause interference, such as motors and generators
(see the EMC guidelines earlier in this section).
Power Source: The unit should be located near a DC power source.
The power cable supplied is 1.5m, but a longer cable can be used if
required. Power must be supplied via a 1A quick blow fuse or circuit
breaker. Refer to Section 5.5, Cable Running.
Interconnections: The unit transmits navigation and waypoint data
on NMEA and, therefore, can be connected to an NMEA
autopilot or compatible instrument repeater(s). The navigation data
transmitted by the chartplotter is detailed in Appendix C to this hand-
book.
Environment: The unit should be protected from physical damage,
heat sources and excessive vibration. Although the unit is waterproof,
it is good practice to mount it in a protected area away from prolonged
and direct exposure to rain and/or salt spray.
When surface mounting the unit to an enclosed compartment, make
sure that the compartment is ventilated and drained. Failure to meet
this requirement may lead to excessive build up of moisture within
the unit, leading to condensation on the screen.
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compatible