[GPSNavX]

iNavX does have AIS plotting functionality. At this time the only way I know to get AIS NMEA data into iNavX on iPhone/iPod/iPad is via WiFi. That can be accomplished by using a PC or a Mac that is connected to an AIS receiver. Another option is a Wireless WiFi adapter such as this ..

http://www.digi.com/products/serialserve...p#overview

If you go the WiFi route also make sure you have external GPS functionality as iNavX is either in WiFi mode or in Location Services (i.e. built in GPS receiver of iPhone 3G[S] or iPad 3G).

Hopefully Apple will open up the Bluetooth profiles to support more than just keyboards and headsets. If they do then there will be more marine instrumentation connectivity options.