I have a comon Garmin GPSmap 923xsv plotter/MFD. And I am not able to use this as a GPS with Cerbo. I can see units from my NMEA2k network on the cerbo, but for some reason the GPSmap apears as a “virtual” device (?). And when I use the v1 interface and select GPS, I dont see my unit. This unit is the current GPSmap, and is running the latest Garmin firmware.