Re: NMEA 2K Network Problems (Garmin GMI 10/Airmar DST800/GPS 19X (NMEA0183))
I'm not convinced that there is a problem, at least with the depth transducer. They are not intended to work in air - if it ever did, that was a fluke.
It DOES sound like there is something funky about the NMEA 0183 wiring, but that might be fixed by re-wiring to the latest wiring diagram.
Bristol 31.1, San Francisco Bay