The LCR-100 Gyrocompass AHRS is a north finding attitude and heading reference system based on a state-of-the-art fibre-optic gyro and micro-electromechanical (MEMS) accelerometers.
A gyrocompass or astrocompass can be used to find true north, while being unaffected by stray magnetic fields, nearby electrical power circuits or nearby masses of ferrous metals.