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Appendix H
Antenna Installation
Installing the GPSMAP 182/182C/232
The GPSMAP 182/182C/232 must be properly installed according to the following instructions to
get the best possible performance. If you have the GPSMAP 182/182C/232 with the built-in internal
bail mount antenna, you may skip this section and proceed to the next page. For unit’s purchased with
the remote GA 29 antenna, follow the instructions below. To complete the installation, you’ll need the
appropriate fasteners and a 1” x 14-thread marine antenna mount available at most marine dealers.
When in doubt, seek professional assistance.
Mounting the GPS Antenna
The antenna should be mounted in a location that has a clear, unobstructed view of the sky in all
directions to ensure the best reception. Avoid mounting the antenna where it will be shaded by the
boat’s superstructure, a radome antenna, or mast. Sailboat users should avoid mounting the antenna
high on the mast to prevent inaccurate speed readings caused by excessive heeling. Most marine
VHF and LORAN antennas should not seriously degrade the GPS antenna’s reception. Never paint the
antenna or clean it with harsh solvents.
The Garmin antenna screws directly onto any standard 1” x 14-thread antenna mount. If you
need to raise the antenna to avoid shading, try using a 1” x 14-thread extension mast available at most
marine dealers.
To install the GPS antenna:
1. Screw the antenna directly onto the 1” x 14-thread mount.
2. Route the cable to the mounting location of the display unit. Use the appropriate tie-wraps,
fasteners and sealant to secure the cable along the route and through any bulkhead or deck.
3. Once the GPSMAP 182/182C/232 unit has been installed, connect the cable to the antenna con-
nector on the back of the display unit. Make sure that you turn the antenna cable connector 1/4
turn clockwise to lock the cable into place.
It is possible to route the coaxial cable either through, or
outside the antenna mount. It is possible to remove the
BNC connector on the coaxial cable and the coaxial cable
shortened to ease installation, however, doing so will void the
antenna warranty. If the BNC connector is removed it must
be replaced with a new solder-on or crimp BNC connector.
Suggested locations for mounting the GA 29 antenna.
182C Manual Part 2.indd 84 6/4/2003, 2:54:30 PM