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radio compass

noun
1.
a radio receiver with a directional antenna for determining the bearing of the receiver from a radio transmitter.
Origin
1915-1920
1915-20
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for radio compass

radio compass

noun
1.
any navigational device that gives a bearing by determining the direction of incoming radio waves transmitted from a particular radio station or beacon See also goniometer (sense 2)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for radio compass

automatic direction finder

radio receiver and directional antenna system used to determine the direction of the source of a signal. It most often refers to a device used to check the position of a ship or aircraft, although it may also direct a craft's course or be used for military or investigative purposes.

Learn more about automatic direction finder with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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