eruptn 74 Posted February 15, 2014 Share Posted February 15, 2014 My trusty old VHF has died so I have replaced it with a Uniden UM380. I also have Garmin 421 GPSMAP and reading the handbooks it appears in can create a NMEA 183 connection between the two so the VHF gets the GPS data an can transmit it in a distress situation etc. The Garmin manual says; Black ground to NMEA ground on the device and Blue( out) to NMEA Rx/A(+) on the device. Uniden manual says; Bare wire to Ground on GPS, Green GPS data IN + Sounds easy only two wires involved, so I have done this and no GPS data appears on the radio and after 30 mins it complains about no GPS data. Should I have also connected the NMEA out as well on the radio to the GPS in ? The GPS is configured for NMEA on serial port 1, standard, not high speed. Anyone been in this dark space care to advise? Thanks Link to post Share on other sites
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