My tablet has no built-in GPS (e.g. iPad Wifi only devices). Can I use it when at sea ?

From Version 3.6 onwards, it is possible to use a non-cellular (i.e; without a GPS chip) iPad in navigation and still be able to display your boat position. You have just to use another (cheap) tablet or phone as a GPS repeater. The repeater can be an iOS or an Android device with Avalaon Offshore.

On your “navigation” iPad, you need to go to the navigation screen settings and activate “Repeat GPS/AIS/NMEA over UDP”.


This function has several advantages:

  • Cost savings: No need to buy a cellular iPad (100 € over the non cellular one)
  • Battery savings: Using GPS on  Cellular iPad unload quickly the battery.
  • If your wifi router only supports TCP and therefore accepts only one device at a time, this solution will enable to connect several devices to the repeater as this repeater will broadcast GPS, AIS and NMEA data in UDP mode.