Raymarine GPS Plotter - Manual (Page 95)

5-4 Raynav 300 GPS Plotter
5.3 GPS Antenna Installation
The GPS Antenna is designed to receive the signals emitted from the
satellites in a direct path. Ideally, the unit should be mounted horizontally
in a location that is open and clear of any masts or other structures that
could block line-of-sight reception of signals.
The height of the GPS Antenna is not as important as it’s having a clear
view horizon to horizon for optimum signal reception. In fact, the lower
the unit can be mounted and have a clear view to satellites, the better. The
more stable the unit, the easier it is to track satellites lower to the horizon.
Note: Do mount the antenna up a mast as this will cause the antenna to
swing with the vessel, leading to significant errors in COG and SOG
readings.
The GPS Antenna can be mounted on a pole. Alternatively, you can use a
pole mounting bracket or surface mount kit.
When mounting the GPS Antenna flush to a deck surface avoid areas
where the unit will be trodden upon or where it may present a tripping
hazard.
The GPS Antenna should be separated by at least 3ft (1m) from other
antennas and electronic equipment. It should not be mounted in the direct
path of a Radar’s antenna beam.
When planning the location for the unit, consider finding a convenient
pathway for running the interconnecting cable between the GPS Antenna
and the Plotter or to the rest of an integrated system. Ideally the cable
should be run in a manner such that it is hidden from view and, if possible,
be in a direct path to the point of connection. It is important to keep the
cable separated from other cables as far as possible to prevent
interference pick-up.
Note: DO NOT cut the cable; an extension cable is available from your
Raymarine dealer.
Surface Mounting
➤
To surface mount the antenna, referring to Figure 5-2:
1. Select a suitable area which allows access to the underside of the
mounting surface for fixing and, using the template supplied in this
handbook, carefully drill the two 6mm (0.25in) fixing holes marked.
2. If the cable is to pass through the mounting surface drill the 6mm
(0.25in) or 19mm (0.75in) centre hole depending on whether the plug
is to pass through the surface or not.
If the cable is to exit from the side of the GPS Antenna above the
81171_4.BOOK Page 4 Thursday, November 29, 2001 11:34 AM