Garmin GPS III Plus - Manual (Page 99)

The GPS III+’s antenna may be removed to allow attachment of an optional
remote-mounted antenna. In some applications, using a remote-mounted antenna
will dramatically increase the number of satellites received. The GPS antenna should
be mounted in a location which provides an unobstructed view of much of the
sky. A minimum of four satellites are needed to determine a three dimensional position. Satellite coverage will vary
throughout the day, but may be checked at any time using the Satellite Status Page (see page 25). If satellite reception is
limited in your particular installation, you may want to consider one of the following options:
Remote Suction Cup Mount – allows you to mount the standard detachable antenna up to 6 feet away from the
GPS III+ unit, using a suction cup mount. This mount should only be used inside a vehicle.
GA 26C Remote Antenna – allows you to mount an amplified antenna outside the vehicle, up to 8 feet away, using
supplied magnetic or suction cup mounts. An optional extension cable allows you to mount the antenna up to 16
feet away. Trunk lip and permanent flange mounts are also available.
GA 29 Remote Marine Antenna - allows you to mount an amplified antenna outside the vehicle, up to 30 feet
away, using a standard 1-inch marine antenna mount (not supplied). An optional extension cable allows you to
mount the antenna up to 60 feet away.
To remove the attached antenna:
1. Rotate the antenna toward the rear of the unit as shown. Note: The
antenna can only be removed or installed in this position.
2. Pull the antenna gently away from the unit.
3. To install an optional external antenna, mate the BNC connector
notches with the mounting posts and turn the knurled knob one-
quarter turn clockwise.
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APPENDIX D
Antenna / Remote Mounting