[rom]

Mírate esta app.

http://www.inavx.com/

Aún no la he probado pero

"Using the iPhone's, iPod touch's and iPad's WiFi connection, iNavX™ can act as a repeater for popular marine navigation software that supports NMEA data over TCP/IP such as MacENC and Coastal Explorer. This includes GPS, AIS receivers & transponders, and Instruments (Depth, Speed, Wind, Engine, Batteries, etc.)"