Method to correction course-indicating faults in electronic compasses produced by permanent vertical magnetism of vehicle for vehicle inclination after compensating for course-indicating faults produced by horizontal magnetism

摘要

The method is performed after compensation for course-indicating faults produced by the horizontal magnetism with the aid of the constancy of the vertical, horizontal or overall Earth's magnetic field strength . Several measurements of the magnetometer , as well as from possible measurement of the inclination of the ship, are made. The vertical magnetism (Rs) of the ship is determined for different inclinations, to correct the course reckoning.