Radar Beacon


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radar beacon

[′rā‚där ‚bē·kən]
(navigation)
A radar receiver-transmitter that transmits a strong coded radar signal whenever its radar receiver is triggered by an interrogating radar on an aircraft or ship; the coded beacon reply can be used by the navigator to determine his own position in terms of bearing and range from the beacon. Also known as racon; radar transponder.

Radar Beacon

 

a transponder used as an aid to navigation that works in conjunction with the radar sets on aircraft and ships. Activated by the signals sent out from a radar set on board a ship or plane, the beacon responds with coded signals, which enable the radar set to determine the beacon’s direction and distance. Radar beacons are used in radio navigation to determine the position of an object with respect to the known position of the beacon and to provide for an accurate approach by these objects to the beacon’s site.

radar beacon system

radar beacon systemclick for a larger image
A radar system in which the object to be detected is fitted with cooperative equipment in the form of a radio transponder (receiver/transmitter). Radio pulses are transmitted from the searching interrogator (transmitter/receiver) site, received in the cooperative equipment, and used to trigger a distinctive transmission from the transponder. This latter transmission rather than a reflected signal is received full strength back at the interrogator site. Also called a radar beacon transponder or a radar beacon.
References in periodicals archive ?
(51) It was during this period that Berlin considered an unusual countermeasure to Allied radar beacon sites.
(4.) For example, in January 1945 the OSS London office only made local distribution of the aforementioned German directive, and the document apparently failed to draw attention to German familiarity with the Eureka radar beacon.
OSS commands remained unaware that in September 1944 the CCB had approved the release of all radar beacon technology to each member of the Alliance including resistance groups.
Among the Allied radio and radar beacon systems Berlin targeted were the larger "Gee" and "Oboe" stations moved to Europe after the Normandy landings.
Recently declassified OSS records show the regular employment of Eureka radar beacons in clandestine drop zone (DZ) operations.
Using flares and radar beacons, this first wave of men marked landing fields, paving the way for other airborne troops to control strategic bridges and road junctions.
They also inspect and maintain automatic navigational aids, radar beacons and light buoys.

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