The ST60 would be NMEA 0183, since the NMEA 2000 standard is a relatively recent development, and hasn't really been included in hardware older than a year or two old at this point.
It would help if you said what new transducer you are installing and how you're planning on connecting everything. If you're hoping to have an NMEA 0183 datastream go from the
Garmin to the
autopilot, carrying the depth and speed data, via the
autopilot to the ST60 displays, my guess would be it isn't going to work.
I seriously doubt the autopilot acts as an NMEA bridge, so I doubt that it would output the depth and speed information on the Seatalk network.
Even if the autopilot did work as a bridge, I don't believe that the ST60 display heads will display depth and speed data that don't come in via the transducer wires. A repeater display would, but I don't think the primary displays, which were designed to be connected to the transducers, will display speed/depth data that comes in via SeaTalk.
I'd also recommend that you read the post in my signature to get the most out of your time on sailnet.
__________________
Sailingdog
Telstar 28
New England
You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
If you're new to the Sailnet Forums... please read this
POST.
Still—DON'T READ THAT POST AGAIN.