Garmin GPS III Owner's Manual

Also see for GPS III: Declaration of conformity Quick guide Owner's manual Owner's manual

Garmin GPS III Owner's Manual Manual pdf 99 page image

Interfacing formats are selected from the Setup options, described on page 87.The input/output lines on your GPS III Pilot are RS-232 compatible allowing easyinterface to a wide range of external devices, including PCs, differentialbeacon receivers, marine autopilots and/or a second GPS receiver.The NMEA 0183 version 2.0 interface format is supported by theGPS III Pilot and enables the unit to drive up to three NMEA devices:NMEA 0183 version 2.0 Approved sentences:GPGGA, GPGLL, GPGSA, GPGSV, GPRMB, GPRMC, GPRTE,GPWPL, GPBODProprietary sentences:PGRME (estimated error), PGRMM (map datum), PGRMZ(altitude), PSLIB (beacon receiver control)DGPS (Differential GPS) corrections are accepted in RTCM SC-104version 2.0 format through the Data In line. The GARMIN GBR 21 is therecommended beacon receiver for use with the GPS III Pilot. Other beaconreceivers with the correct RTCM format may be used, but may not correct-ly display status or allow tuning control from the GPS unit.The GPS III Pilot may be hard-wired to a vehicle’s electrical system (10-32 VDC) using an optional power/data cable. Consult the wiring diagram tothe right for proper connections. (The male connector on the back of theGPS III Pilot is illustrated.) A cigarette lighter adapter is also available topower your GPS III Pilot without making permanent connections.Additional cables are available to connect your GPS III Pilot to a PC-compatible computer’s serial port (PC Interface Cable) or to connect to asecond GPS III Pilot (Data Cross-Load Cable). Contact your GARMIN deal-er for any of these accessories. 91GARMINGBR 21(+) Power(-) GroundData In Data OutGPS III Pilot Connections (from back of unit)GARMIN GBR 21 Beacon ReceiverAPPENDIX CWiring / Interfacing