Hello, ✓ SailFreeGPS displays current location, course (COG), speed (SOG), max speed, Trip distance, speed average and magnetic compass. ✓ SailFreeGPS displays COG and SOG history (6h) to help you to see trim effect on your sails. ✓ SailFreeGPS filters GPS information for more accuracy (average of an amount of last measures you can set). ✓ SailFreeGPS can share your position, COG, SOG to your friends. ✓ SailFreeGPS helps you during Man OverBoard maneuver (MOB). It stores the location and lead y