GB/T 24955.2-2010

This standard specifies the requirements for transmitting heading devices (THDs) that operate on geomagnetic principles, defining performance, testing, and accuracy criteria for equipment that determines a vessel's heading by sensing the Earth's magnetic field. It is applied in the shipbuilding and marine technology industries for the design, manufacture, and type approval of magnetic compass-based heading sensors used on commercial ships, yachts, and other maritime vessels. The standard ensures reliable heading data for navigation systems, autopilots, and radar integration, particularly in contexts where electronic fluxgate or magnetometer-based THDs are installed.