Lorann.

1942 (title) Development of airborne receiver model LRN-1: report on project 191. (Radio Corporation of Amer. License Div. Lab. Rep. No. 207 (PB 32732), 9 Sept.).]

1943 (title) Development of Loran receiver trainer: report on project 191 (extension). (Radio Corporation of Amer. License Div. Lab. Rep. (PB 23321), 17 Mar.)

1945 Tuscaloosa (Alabama) News 18 Oct. 5 In the airplane, a loran receiver measures the difference in radio wave travel time in millionths of a second.

1945 Electronics Nov. 94/1 Loran..is one of a family of systems known as ‘hyperbolic navigation systems’, which measure the relative time of arrival of two or more radio signals sent synchronously from known points.

1946 J. P. Baxter Scientists against Time ix. 151 The beauty of Loran for wartime use was that the ship or plane which used it emitted no signal that might give away its position.

1960 M. Sharcott Place of Many Winds i. 6 We passed Spring Island, where there is a Department of Transport Loran station.

1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) VII. 585 The distance at which reliable loran fixes are generally obtained is about 800 nautical miles over water from the pair of transmitting stations during daytime and about 1500 miles at night.

1972 K. Campbell Thunder on Sunday 11 ‘Get a Loran fix.’.. Peter Spence had his face glued into the rubber eye~piece of the Loran... He counted the jumping electric lines and the long number blips... He then transferred his eyes to the Loran map.