LORAN

n. long-range navigational device which uses radio waves

LORAN (LOng RAnge Navigation) is a terrestrial radio navigation system using low frequency radio transmitters that use the time interval between radio signals received from three or more stations to determine the position of a ship or aircraft. The current version of LORAN in common use is LORAN-C, which operates in the low frequency portion of the EM spectrum from 90 to 110 kHz. Many nations are users of the system, including the United States, Japan, and several European countries. Russia uses a nearly identical system in the same frequency range, called CHAYKA. LORAN use is in steep decline, with GPS being the primary replacement. However, there are current attempts to enhance and re-popularize LORAN.
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Loran can refer to one of the following:LORAN, the terrestrial radio-based navigation system.Loran (cassette), a brand of blank audio cassette made out of Lexan plastic.Sir Loran of Trollpyre Keep, a fictional character in the World of Greyhawk campaign setting for the Dungeons & Dragons role-playing game.Loran Cehack, the fictional protagonist of the anime series Turn A Gundam.
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n. loran, navigational device which uses radio waves

loran, long-range navigational device which uses radio waves

Acronym for long-range radio navigation . A long-range radio navigation position-fixing system consisting of an array of fixed stations that transmit precisely synchronized signals to mobile receivers. Note: A loran receiver measures differences in the times of arrival of the signals from the various stations. A fixed difference in the time of arrival of the signals from any two stations will define a hyperbolic arc on which the receiver must lie. Three or more stations are needed to remove ambiguities in the position of the receiver. Synonyms long-range aid to navigation system, long-range radio aid to navigation system.