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

I just checked the ST60 plus on the Raymarine site. The Wind instrument requires an additional Raymarine E85001 NMEA interface if you want to network with any other non-Seatalk stuff. A single Raymarine ST60 Plus Graphic display can interface with it via Seatalk and provide the NMEA interface to other stuff, but you would need to provide the speed and depth info to it via NMEA 0183.

You could probably verify if the NMEA interface is working on your existing stuff by making temporary connections between one of the NAVMAN display NMEA outputs and another device with NMEA such as a GPS. Some of the Garmin handhelds support NMEA. If you know someone with a display that supports NMEA 0183 ask to borrow it for the testing. That way you can determine how soon you need to spend money, and the potential upgrade paths available to you.