Information AboutGee |
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LORAN was used by the US Navy and Royal Navy during World War II, and after the war came into common civilian use world-wide for coastal navigation, until GPS made it obsolete. TECHNICAL DETAILS GEE transmitters sent out precisely timed pulses. The aircraft using GEE, Bomber Command 's heavy bombers, examined the time of arrival on an Oscilloscope at the navigator's station. If the pulses from two stations arrived at the same time, the aircraft was an equal distance from both, allowing the navigator to draw a line on his map of all the positions at that distance from both stations. Similarly, a difference in the arrival times indicated that the aircraft was closer to one station than the other; the actual difference denoted a particular Hyperbola along which the aircraft must lie. By making similar measurements with a third station, an additional hyperbola could be produced, leading to a fix at the intersection of the two lines. SERVICE HISTORY GEE entered service in March 1942 and was accurate to about 165 Yard s at short ranges, and up to a Mile at longer ranges over Germany . At its extreme range, which was about 400 miles, it had an accuracy of 2 miles. Unlike the German Beam Systems where the bombers flew to their targets along the beam, the GEE pulses were not directional, so even if detected, they would not reveal the bombers' likely destinations. As the system was passive, unlike H2S , there were no return signals which could give away the bomber's positions to night fighters. However, the system was open to Jamming , which became a routine problem about five months after GEE came into widespread use. However, the jamming was only effective over Europe , so aircraft still used GEE for navigation near their bases. STATIONS Eastern chain The Eastern chain operated from 22 June 1941 . The master station was at Daventry . Other stations included Ventnor and Stenigot . Northern chain The Northern GEE chain operated from late 1942 until March 1946 {Link without Title} . The master and monitor stations were on Burifa Hill on Dunnet Head , in Caithness , Scotland . Slave stations included:
South chain FURTHER READING
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