radar beacon

radar beacon

noun
a radar device at a fixed location that, on receiving a radar signal, automatically transmits a particular radar signal in reply, identifying itself and enabling navigators of ships and aircraft to determine their distance and direction from it.
Also called racon.


Origin:
1940–45

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World English Dictionary
radar beacon
 
n
Also called: racon a device for transmitting a coded radar signal in response to a signal from an aircraft or ship. The coded signal is then used by the navigator to determine his position

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