You have one of two types of GPS antennas in your product box. Use the illustrations to identify the included antenna and follow the correct
installation procedures.
GPS 17
•
Can be surface mounted or pole mounted. See
•
Uses a separate template for surface mounting. See
•
Connects to the chartplotter using NMEA 0183. See
CAutIoN: Be sure to follow the correct mounting directions and the correct wiring directions for the antenna included with your chartplotter.
Choosing a location for the GPS antenna
You can surface mount the GPS 17 and GPS 17x antennas, attach them to a standard 1 in. OD pipe-threaded-pole marine mount (14 threads-
per-inch—not included), or even install a GPS 17x antenna under fiberglass.
Select a suitable location for the GPS antenna on your boat. To ensure the best reception,
mount the GPS antenna in a location that has a clear, unobstructed view of the sky in all
directions.
•
Avoid mounting the GPS antenna where it is shaded by the superstructure of the boat, a
radome antenna, or mast.
•
On a sailboat, avoid mounting the GPS antenna high on the mast, to prevent inaccurate
speed readings caused by excessive heeling.
•
The GPS antenna provides more-stable readings when located nearer to water level.
Mount the GPS antenna at least 3 ft. (1 m) away from (preferably above) the path of
•
any radar beam or a VHF radio antenna.
•
Temporarily secure the antenna in the preferred mounting location and test it for correct
operation. If you experience interference with other electronics, try a different location.
When you verify correct operation, permanently mount the antenna.
GPSMAP 4000/5000 Series Installation Instructions
Mounting the GPS Antenna
GPS 17x
page
6.
•
page
23.
•
page
9.
•
Can be surface mounted, pole mounted, or mounted under a
fiberglass surface. See
page
Does not use a separate template for surface mounting. See
Connects to the chartplotter using NMEA 2000. See
EMI
EMI
EMI (Electromagnetic Interference)
EMI (Electromagnetic Interference)
Above - best
Above - best
GPS 17x Placement Considerations
GPS 17x Placement Considerations
7.
page
Better
Better
Good
Good
from engine components
from engine components
Below - OK
Below - OK
Radar
Radar
VHF Radio Antenna
VHF Radio Antenna
page
7.
10.
Best
Best
ft.
ft.
(1 m)
(1 m)
5
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