Great Program, the author might provide source code ???
I switched to Coastal Explorer for it's added features but I reccomend Sea Clear to everyone that wants a great basic program.
SeaTalk=>NEMA: There are some folks out there that have done hobby hacks on seatalk to nema convertion.
Here is some of it.....
http://isaac.phys.um.edu.mt/~lzamm/st_remote/
http://www.thomasknauf.de/seatalk.htm
http://www.voti.nl/seatalk/index.html