What is the question. It is pretty easy to use an NMEA multiplexer to combine the output from three instruments and a
GPS to talk to a PC.
BTW, NMEA 0183 protocol is actually a RS-422, rather than RS-232 IIRC.
There are several navigation packages that are free, but none that I know of that are open source. Are you trying to run the software on Linux or Windows? The platform would help me suggest something.
There is also a very nice NMEA Multiplexer that has Bluetooth capability, which means you can use a PDA or Laptop that is Bluetooth equipped to connect, without running a wire.
__________________
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.