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Chapter 3: Installing the GPS Antenna
The RS12 package contains the following items:
1. Low profile GPS Receiver, with 10 m (33 ft) cable
2. Flush mount gasket
3. Mounting studs (x2) and thumb nuts (x2)
4. Pole mount kit *
Note:
* If you intend to mount the receiver on a pole, you will need to obtain a suitable
pole with 1 inch 14 TPI thread.
3.1 Selecting the Mounting Location
The RS12 can be mounted on a pole or flush mounted on a suitable horizontal
surface.
Receiver Location
The RS12 receiver is designed to receive the signals emitted from satellites in a
direct path. It should be mounted:
• On a horizontal surface.
• In a location that is open and clear of any obstructions (such as masts, search
lights, or other structures) that could block line-of-sight reception of signals.
• As low as possible: the height of the receiver is not as important as it 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 more effectively it will track satellites low to the hori-
zon.
Note:
Do NOT mount the receiver up a mast, as the receiver will swing with the boat,
leading to significant COG/SOG errors.
• As far as possible from any sources of interference: the receiver should be sep-
arated by at least 1 m (3 ft) from other antennas and electronic equipment. It
should not be mounted in the direct path of a radar’s beam.
When mounting the receiver flush to a surface:
• select an area that allows access to the underside of the mounting surface
• avoid areas where the receiver might be stepped on or tripped over
87081.book Page 19 Wednesday, December 20, 2006 2:43 PM