a common example of a static direction sensor, and can be integrated with the GPS receiver in the present invention
a device that tells us what direction is North
A device for determining directions by means of a magnetic needle swinging on a free pivot and pointing to the magnetic North.
instrument indicating directions by a magnetic needle, see article on the compass.
Chinese invention that allowed sailors to determine their position and direction at sea; astrolabe - Muslim instrument enabling navigators to plot latitude or position north and south of the equator. (p. 506)
An instrument showing the direction of magnetic north and compass bearings.