Global Positioning Systems (GPS)

JOFUUM Marine Boat Car GPS Speedometer Digital with GPS Antenna for Motor Yacht TFT Screen Waterproof Odometer White & Silver Can freely switch kont, mph, km/h speed unit Battery voltage: 9-32V Navigation pointer: 8 directions. : Speed over the ground. TRIP: Single mileage, reset after power failure. ODO: Accumulated mileage, save when power off. COG: heading, clockwise... JOFUUM Marine Boat Car GPS Speedometer Digital with GPS Antenna for Motor Yacht TFT Screen Waterproof Odometer White & Silver