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・ Omedu
・ Omega
・ Omega (Alyson Avenue album)
・ Omega (Asia album)
・ Omega (audio drama)
・ Omega (band)
・ Omega (barque)
・ Omega (camera)
・ Omega (comics)
・ OMEGA (counterterrorism unit)
・ Omega (Cyrillic)
・ Omega (disambiguation)
・ Omega (Doctor Who)
・ Omega (film)
・ Omega (Marvel Comics)
Omega (navigation system)
・ Omega (novel)
・ Omega (singer)
・ Omega (TeX)
・ Omega (video game)
・ Omega 28.9 chronograph
・ Omega 7
・ Omega Aerial Refueling Services
・ Omega Airport
・ Omega and agemo subgroup
・ Omega Andromedae
・ Omega Aquarii
・ Omega Aquilae
・ Omega Arcane
・ Omega Aurigae


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Omega (navigation system) : ウィキペディア英語版
Omega (navigation system)

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.
==History==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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