Ok... after researching my options, decided to go the way with a usb generic gps and a laptop to get started with gps navigation.
Installed SeaClear II and everything is running fine now.
Care to share how you got that generic USB GPS to talk to Seaclear? I've done half a dozen things and I still get "cannot open COM PORT X" in Seaclear.
Yes, I've got and have installed the serial port emulator. No dice.
The USB GPSes give me accurate lat/lon with their rudimentary software, but I can't get Seaclear to recognize their NMEA 183 output.