A full Navigation Tool for Android Tablets and Phones and the best Navigation aid Tool for Sailors. Navigation Data Visualize navigation data on your phone or tablet: position, SOG, COG, speed, heading, apparent wind, true wind, ground wind, VMG, Beaufort force, depth, water temperature, UTC time. (A NMEA 2000® or a NMEA 0183 WiFi adaptor is required to receive NMEA data. SeaWi decodes NMEA 2000® and NMEA 0183 data received in TPC, UDP Unicast and Multicast packets). You can also use the bui