Was Loran Long Range Air Navigation..?
Omega LORAN was indeed
LOng
Range
Airborne
Navigation - as fitted to the Shack AEW. The ground stations were a chain of transmitters that the ac receiver used to triangulated the position of the ac relative to the transmitters. It was a successor to the Decca Loran/Loran-C system that used to be used by ships & ac (larger ac) prior to the advent of GPS.
Mac