Choosing The Mounting Location - Furuno GP-330B Operator's Manual

1.3

Choosing the Mounting Location

For a reliable GPS signal, selecting the best location for the receiver is very important. It can be
mounted on a pole, rail, or flat surface. Choose a location that balances the requirements below.
• The GPS receiver must have a clear view of the sky to the horizon in all directions. Note that
frozen water spray may degrade reception.
• Referring to the figure below for distances, mount away from any VHF radio, satellite commu-
nications equipment, radar, or other antennas to avoid mutual interference.
• Mount above or below any radar beam. Do not mount within a radar beam.
• Mount reasonably level with the earth's surface -- not tilted to one side.
• Do not mount on top of a sailboat mast. The sway will cause jitter in the data.
• Do not mount where the GPS receiver could be a tripping hazard or tread upon.
• Be sure there is access to the underside of the mounting surface.
• Be sure the cable(s) can be routed to reduce electrical interference from other electrical wiring
and any equipment with a strong magnetic field such as radar, radio transmitters, engines, gen-
erators, etc. Separate the cables by at least 1 meter (3 feet).
Long-wire
TX MF/HF
antenna
Antenna
insulator
not within
INMARSAT beam
B-, F-type: 25°
C-type: 15°
INMARSAT
antenna GPS receiver
Min. 5 m
Min. 1.5 m
Min. 1 m
Radar
Min. 5 m
Min. 4 m
VHF antenna
or RX MF/HF
whip antenna
Loop
antenna
Min. 3 m
Min. 1 m
Min. 4 m
not within
radar beam
2
1. INSTALLATION
TX whip
antenna
(MF/HF)