TF640 Tracking Function and Detect Fish Function Combined GPS

TF640 Tracking Function and Detect Fish Function Combined GPS GPS&Compass GPS Data: show Distance to target, Distance to Home,Speed of boat, Time to Boat, Satellite number , Latitude/longitude of boat, Heading, Bear, Course memory ,Time of day ,Main battery,etc Compass indicator of the instant boat heading direction on screen (a red “+” screen indicates the target Indicator of the position and distance to target waypoint and HOME Boat arriving alarm Signal lost alarming