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