"Geoff Schultz" wrote in message
.. .
If you do a google search on this news group, you'll see that I provided a
link to a document that describes the protocol for normal SeaTalk. The
author was very responsive in some questions that I had.

Yep. http://www.thomasknauf.de/seatalk.htm

While I can't tell you if there are differences between normal SeaTalk and
SeaTalk NG, I would bet that they are the same and that main differences
are in the physical and datalink layers.

It is indeed very different, NG is based on NMEA2000.

IMHO, RayMarine has too much invested in lots of software to be making
fundamental changes in the protocol.

Well, since NMEA2000 is based on CAN, it is relatively easy to run NMEA2000
alongside some proprietary protocol on the same CAN bus and call is Seatalk
NG.

Meindert