[GPSNavX]

iNavX can use marine instrumentation NMEA-0183 data via WiFi. This is in place of the built in "Location Services" If one doesn't want to carry a Mac/PC aboard to serve (broadcast) the data, but instead just wants to have an iPod/iPhone/iPad then there is an answer: The Digi Connect Wi-SP creates a stand alone Ad-Hoc network that iNavX can connect to. You can connect a GPS receiver, AIS transponder or other marine instrumentation to the Wi-SP serial port. The port accepts RS232 (most common) and RS422 input.

Marine Instrumentation NMEA-0183 Data -> Wi-SP -> [WiFi] -> iPod/iPhone/iPad -> iNavX

Configuration Guide..

http://www.gpsnavx.com/pdf/Wi-SPConfigOSX.pdf

For a bare-wire connection to the Wi-SP or a Keyspan USB to serial adapter we offer this adapter..

http://www.gpsnavx.com/html/datacable.html