Omega (navigation system)
![based on NASA Worldwind-globe [1] - location of Omega-transmitter A in Norway (distances)](/Images/godic/202501/31/OmegaStationADistances0417.png")
![Omega could determine position to a precision of ±2.2 km (1.4 mi). Later radio navigation systems were more accurate.](/Images/godic/202501/31/Accuracy_of_Navigation_Systems.svg0417.png")
![The Communications Control Link building of the Naval Radio Station at Haiku, part of the Kaneohe Omega Transmitter, 1987](/Images/godic/202501/31/Kaneohe_Omega_Transmitter_with_CH-53_19870417.JPEG")
![Omega Tower Paynesville, Liberia](/Images/godic/202501/31/OmegaTowerLiberia-ctr0417.jpg")
OMEGA was the first truly global-range radio navigation system, operated by the United States in cooperation with six partner nations. It enabled ships and aircraft to determine their position by receiving very low frequency (VLF) radio signals in the range 10 to 14 kHz, transmitted by a network of fixed terrestrial radio beacons, using a receiver unit. It became operational around 1971 and was shut down in 1997 in favour of the Global Positioning Satellite system.