Thanks Clinton and Plankbender for excellent posts. Had been thinking along similar lines but wasn't sure how to proceed. I'm also really interested in utilising the excellent Airnav software in the cockpit.
Wondered if you could spell out for me how you do it wrt bluetooth.
What kind of GPS are you using? Is it 1 with its own screen/Jepp data base (eg Garmin Aera 500) or simple bluetooth GPS mouse like thing (eg Garmin GPS10)?! How easy was set up with Airnav?