GPS 72H Owner’s ManualMarine NavigationConnecting the Power/Data CableThe power/data cable connects the GPS 72H to a 8-35 volt DC system andprovides interface capabilities for connecting external devices. The colorcode in the diagram below indicates the appropriate harness connections. Thereplacement fuse is a AGC/3AG - 2.0 Amp fuse.GPS 72H Power/Data Cable>>ColorRedBlackWhiteBrownFunctionPowerGroundData Out (Tx)Data In (Rx)InterfacingThe following formats are supported for connection of external devices:GARMIN proprietary Differential GPS (DGPS), NMEA 0183 version 2.3,ASCII Text Output, and RTCM SC-104 input (version 2.0).