Navigate your sail boat using Electronic Raster Charts on your SD cart.
Use the internal GPS device or connect to a GPS via TCP bluetooth or serial device via USB-serial adapter.
Includes AIS display if provided by the external device.
Easy waypoint and route creation and modification. Store tracks in gpx format on your SD card. Import and export tracks and routes in standard gpx format.
Master-Slave mode - display on other devices in the same network.
This app is an android port of the Raspberry Pi solution - see http://www.wellenvogel.net/software/avnav/index.php (German).
Charts must be converted into the GEMF format before they can be used (for necessary software follow the above link).
For an online demo see http://www.wellenvogel.net/software/avnav/viewer/avnav_viewer.html?navurl=avnav_navi.php.
The app runs starting from KitKat (4.4).