Garmin GPSMAP 168 Sounder - Manual (Page 104)

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Appendix G
Antenna Installation
Installing the GPSMAP 168 Sounder
The GPSMAP 168 Sounder must be properly installed according to the following instructions to
get the best possible performance. If you have the 168 Sounder with the built-in internal bail mount
antenna (010-00202-00), you may skip this section and proceed to the next page. For unit’s purchased
with the external GA 29 antenna (010-00199-00), 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.
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. The GPS antenna should be mounted about 2.5-3
feet away from the radar dome. 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 168 Sounder unit has been installed, connect the cable to the antenna connector
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. The BNC connector on the
coaxial cable can be removed, and the coaxial cable
shortened to ease installation. If the BNC connector is
removed it must be replaced with a new crimp, compression
or solder-on BNC connector. If you need assistance, please
contact GARMIN Technical Support at 913-397-8200.
Suggested locations for mounting the GA 29 antenna.
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