loran(redirected from GRI (LORAN))
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A long-range navigational system in which position is determined by an analysis involving the time intervals between pulsed radio signals from two or more pairs of ground stations of known position.
(Navigation) a radio navigation system operating over long distances. Synchronized pulses are transmitted from widely spaced radio stations to aircraft or shipping, the time of arrival of the pulses being used to determine position
[C20: lo(ng-)ra(nge) n(avigation)]
lo•ran(ˈlɔr æn, ˈloʊr-)
(sometimes cap.) a navigational system for locating one's position by determining the time displacement between radio signals from two known stations.
[1940–45, Amer.; lo(ng)ra(nge)n(avigation)]
A long-range radio navigation position fixing system using the time difference of reception of pulse type transmissions from two or more fixed stations. This term is derived from the words long-range electronic navigation.