direction finder, electronic device used to determine the position of a ship or aircraft. In a simple direction finder a radio receiver is equipped with a revolving directional antenna. The antenna receives the strongest radio signal when it is pointing directly at a transmitter. By determining the direction of two land-based transmitters, a navigator may plot his position by triangulation. Direction finders have been replaced in many applications with more accurate systems, such as radar and satellite navigation systems (see satellite, artificial).
"direction finder." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (February 19, 2018). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/direction-finder
"direction finder." The Columbia Encyclopedia, 6th ed.. . Retrieved February 19, 2018 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/direction-finder
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di·rec·tion find·er • n. a special radio receiver with a system of antennas for locating the source of radio signals, used as an aid to navigation.
"direction finder." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (February 19, 2018). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/direction-finder
"direction finder." The Oxford Pocket Dictionary of Current English. . Retrieved February 19, 2018 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/direction-finder