1. The locating of a radio transmitter by bearings taken from two or more direction finding stations, the site of the transmitter being at the point of intersection.
2. The location of a ship or aircraft by determining the direction of radio signals coming to the ship or aircraft from two or more sending stations, the locations of which are known.
C.f. triangulation.
Source: from Federal Standard 1037C and from the Department of Defense Dictionary of Military and Associated Terms