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  1. GARMIN 188c or 298 to VHF UNIDEN UM625c for DSC NMEA Operation

    Greetings, I have both a GARMIN 188C and 298 GPS Charplotter and UNIDEN 625c down in my chart room. Both GARMIN units are the EXACT same wiring harness and diagram in their respective manuals and confirmed by GARMIN Support. I've unsuccessfully been trying to connect either to my Uniden 625C...