After World War II, Very-high frequency Omni Range (VOR) technology merged highly accurate crystal oscillators (timers), based in remotely operated ground stations, with high. TOOLS: Radio Direction Finding (RDF) stations, radio compasses, radio range, Very High Frequency Omni Range (VOR), YE-ZB, radar, Gee, Decca, LORAN, GPS.ĪDVANTAGE: Works when out of sight of the ground and/or sky.ĭISADVANTAGE: Requires complex and heavy equipment in the aircraft and a complex array of ground and/or space-based equipment and infrastructure.ĬHALLENGES: Subject to natural or manmade interference. This mid-1950s era VOR receiver helped usher in a new era of all-weather navigation capability for light aircraft at moderate cost. This allowed less experienced users to achieve the same results as highly trained celestial navigators and eventually decreased the need for professional navigators. When war broke out, new military equipment revolutionized air navigation. ![]() Each system of radio navigation uses time in a slightly different way and each requires its own type of navigational charting.īy World War II, a web of air navigation radio stations and beacons connected by “airways” began to cover the globe. A VOR transmitter produces signals for 360 radials that an airborne receiver uses to indicate the aircraft’s location in relation to the VOR station regardless of the aircraft’s direction of flight. The invention of timekeeping technologies, such as the crystal oscillator, led to a new era of systems that could fix position accurately and were easier to use. Radio navigation became the most important air navigation technology.īefore World War II, radio navigation could only provide a course or a bearing to a station.
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