a compass consisting of a motor-operated gyroscope whose rotating axis, kept in a horizontal plane, takes a position parallel to the axis of the earth's rotation and thus points to the geographical north pole instead of to the magnetic pole
"gyrocompass." YourDictionary, n.d. Web. 15 October 2018. <http://www.yourdictionary.com/gyrocompass>.
gyrocompass. (n.d.). Retrieved October 15th, 2018, from http://www.yourdictionary.com/gyrocompass
A compass with a motorized gyroscope whose angular momentum interacts with the force produced by the earth's rotation to maintain a north-south orientation of the gyroscopic spin axis, thereby providing a stable directional reference.