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A localizer is a form of radio beacon used in instrument landing systems for aircraft. It is located about 230 metres beyond the stop end of an airfield runway and radiates two signals of different frequencies from two aerials whose polar diagrams overlap in such a way that their signals are of equal strength along the centre of the runway. In the receiving equipment fitted in the aircraft the two signals are applied to a centre-zero instrument. When the indicating pointer of the instrument is in the centre (zero) position the pilot knows that he is correctly aligned with the runway.
 Research Localizer
LOC is an abbreviation for Localizer
LOC is an abbreviation for Launch Operations Centre
LOC is an abbreviation for Limitation of Cost
LOC is an abbreviation for Limited Operation Capability
LOC is an abbreviation for Lines Of Code
Research LOC
RAPLOC is an abbreviation for Rapid Acoustic Passive Localizer
Research RAPLOC
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The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
©1993 - 2009 The Probert Encyclopaedia
Southampton, United Kingdom
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