Can anyone tell me what the Humminbird 767 GPS/Chartplotter NMEA 0183 "TALKER ID" is?  Is it $GP or something else.
A customer wants to repeat the 767 0183 NMEA sentences on a NMEA 0183 data repeater such as Depth Below Transduce (DBT) but doesn't know what the TALKER ID is.  Should he be specifying $GPDBT  

Regards,
Bert van den Berg
New Zealand