It sounds like your VHF radios are basically self-sufficient and since you have an AIS transceiver likely already on your NMEA-2000 network there isn't a reason to connect them to the NMEA-2000 network unless there was further integration you're after (like DSC station to station calling via the MFD).Īn external GPS is likley to be more accurate than a patch style GPS antenna burried in the radio at the lower helm. So, if you had a DSC VHF radio that didn't have built-in GPS you could use the 0183 output of your MFD or a dedicated GPS unit to feed it location information. NMEA-0183 was designed for point to point connections between two devices.
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