J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment Shopping Instruments, GPS Data on ST60 Speed display

The ST40 is ancient in the marine electronics world. Raymarine didn't break out NMEA data for a long time and required everyone to interface with their propriety Seatalk bus. The ST60 series got a little better with some units having NMEA built in, but not all of them. A friend with a Catalina has ST60 series stuff and has a multi-display with a NMEA interface he connects to a Furono radar.