Using a Garmin portable GPS as a position source for the GNC 255

Some functions, including searching for nearest frequencies, require a GPS input. Garmin® portable devices can be used to provide this information. An appropriate bare wires cable would need to be installed by your avionics technician. Once properly connected, the Garmin portable GPS will need to be correctly interfaced. Please see the Pilot’s Guide of your GPS for further details on the interface setting.