84Appendix HAntenna InstallationInstalling the GPSMAP 182/182C/232The GPSMAP 182/182C/232 must be properly installed according to the following instructions toget the best possible performance. If you have the GPSMAP 182/182C/232 with the built-in internalbail mount antenna, you may skip this section and proceed to the next page. For unit’s purchased withthe remote GA 29 antenna, follow the instructions below. To complete the installation, you’ll need theappropriate fasteners and a 1” x 14-thread marine antenna mount available at most marine dealers.When in doubt, seek professional assistance.Mounting the GPS AntennaThe antenna should be mounted in a location that has a clear, unobstructed view of the sky in alldirections to ensure the best reception. Avoid mounting the antenna where it will be shaded by theboat’s superstructure, a radome antenna, or mast. Sailboat users should avoid mounting the antennahigh on the mast to prevent inaccurate speed readings caused by excessive heeling. Most marineVHF and LORAN antennas should not seriously degrade the GPS antenna’s reception. Never paint theantenna or clean it with harsh solvents.The Garmin antenna screws directly onto any standard 1” x 14-thread antenna mount. If youneed to raise the antenna to avoid shading, try using a 1” x 14-thread extension mast available at mostmarine 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 1/4turn clockwise to lock the cable into place.It is possible to route the coaxial cable either through, oroutside the antenna mount. It is possible to remove theBNC connector on the coaxial cable and the coaxial cableshortened to ease installation, however, doing so will void theantenna warranty. If the BNC connector is removed it mustbe replaced with a new solder-on or crimp BNC connector.Suggested locations for mounting the GA 29 antenna.