| 41. | In 1946, he co-founded Offshore Navigation Inc ., a radio navigation business supporting oil exploration in the Gulf of Mexico.
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| 42. | World War II again accelerated development of radio for the wartime purposes of aircraft and land communication, radio navigation and radar.
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| 43. | In recent decades, commercial fishing vessels have been increasingly equipped with electronic aids, such as radio navigation aids and fish finders.
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| 44. | The FAA would like to save money by turning off some ground-based radio navigation equipment as airplanes increasingly use satellite-based navigation.
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| 45. | Trawling has also been a major activity, with the use of radio navigation aids and echo sounders making life easier now.
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| 46. | The Decca Navigator System was a hyperbolic radio navigation system that was installed around the coasts of Britain in the 1940s.
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| 47. | By this point LORAN and GPS systems were falling in cost, and these had replaced most forms of radio navigation by 2000.
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| 48. | Over the years, many radio navigation systems were designed using stable time and frequency signals broadcast on the LF and VLF bands.
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| 49. | Since World War II, commercial fishing vessels have been increasingly equipped with electronic aids, such as radio navigation aids and fish finders.
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| 50. | During World War II, American forces developed a radio navigation system called LORAN, which has been steadily updated and is still widely used.
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