TRUENAUTE

Marine gyrocompass systems comprised of marine heading and vertical reference equipment, namely, gyroscopes, accelerometers, level sensors for measuring Earth rotation and gravitational force, electronic computing devices, namely, calculator for north direction and operating software for regulation, recalibration and error correction of ship heading and vertical reference information, and digital repeaters for transmission and displaying the direction to the bridge of the ship; marine heading and vertical reference systems comprising gyroscopes, accelerometers, level sensors, for measuring Earth rotation and gravitational force, electronic computing devices, namely, calculator for north direction, operating software for regulation, recalibration and error correction of ship heading and vertical reference information, and digital repeaters for transmission and displaying the direction to the bridge of the ship