Patent ID: 6166686
Filing Date: 2000-12-26
Classification: G01C

Abstract:
A directional finding system for providing a corrected compass reading based on true north for a selected location, comprising:a location device for generating a location signal corresponding to the selected location based on a known coordinate system;a storage device including electronically stored deviation data for correlating magnetic north to true north in any location, the storage device being in electrical communication with the location device and operative to generate a deviation signal corresponding to the deviation between magnetic north and true north based on the location signal;a clock in electrical communication with the storage device and operative to generate a time signal based on a current time and date;the deviation data electronically stored within the storage device further correlating magnetic north to true north for current time and date with the deviation signal generated thereby corresponding to the deviation between magnetic north and true north based on the location signal and the time signal; anda magnetic compass device in electrical communication with the storage device, the magnetic compass device being operative to generate a magnetic bearing reading, and a true bearing reading based on a correction of the magnetic bearing reading with the deviation signal.