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loran

The Columbia Encyclopedia, 6th ed. | 2011 | Copyright

loran , long-range, accurate radio navigational system used by a ship or aircraft to confirm or to determine its geographical position. The term loran is derived from the words lo ng- ra nge n avigaton. Loran, operating in the 1,700-kHz range, measures the time-of-arrival difference between two signals transmitted from two geographically separated ground stations. The pulse from the first station, called the master, triggers the second station, called the slave, into transmitting a similar pulse after a set time delay. Knowing the elapsed time difference, the navigator refers to a loran chart and selects his line of position. The chart contains groups of hyperbolic curves of constant time differences between particular station pairs. The position of the receiver (ship or airplane) will be somewhere along the curve that corresponds to the measured time difference. By taking a similar time-difference reading from a second pair of stations whose curves intersect those of the first pair, a definite geographic fix may be obtained.

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loran

World Encyclopedia | 2005 | Copyright

loran (Long range navigation) Radio system of navigation for ships and aircraft. Pairs of transmitters emit signal pulses that are picked up by a receiver. By measuring the difference in time between the signals reaching the receiver, the vessel's position can be plotted.

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loran

The Oxford Essential Dictionary of the U.S. Military | 2001 | Copyright

loran also Loran n. a system of long-distance navigation in which position is determined from the intervals between signal pulses received from widely spaced radio transmitters.
1940s: from lo(ng-)ra(nge) n(avigation).

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loran

Oxford Dictionary of Rhymes | 2007 | Copyright

loran •Aran, Arran, baron, barren, Darren, Karen, Sharon, yarran •Biafran, saffron •plastron • Saharan • Sumatran •heron, perron •rhododendron • chevron •Aaron, Charon, Dáil Eireann •apron •matron, patron •Libran •decahedron, dodecahedron, octahedron, polyhedron, tetrahedron •children • citron • grandchildren •stepchildren • godchildren •schoolchildren •Byron, Chiron, environ, Myron, siren •sporran, warren •squadron • Cochran •Andorran, Doran, Lauren, loran •cauldron •Kieran, Madeiran, schlieren •Honduran, Van Buren •Aldebaran • Auberon • Acheron •Cameron, Decameron •cateran, Lateran •veteran •dipteran, hemipteran •lepidopteran • Lutheran

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LORAN

The Oxford Dictionary of Abbreviations | 1998 | | Copyright

LORAN (ˈlɒræn) long-range navigation

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FRAN ALEXANDER , PETER BLAIR , JOHN DAINTITH , ALICE GRANDISON , VALERIE ILLINGWORTH , ELIZABETH MARTIN , ANNE STIBBS , JUDY PEARSALL , and SARA TULLOCH. "LORAN." The Oxford Dictionary of Abbreviations. 1998. Encyclopedia.com. 29 May. 2012 <http://www.encyclopedia.com>.

FRAN ALEXANDER , PETER BLAIR , JOHN DAINTITH , ALICE GRANDISON , VALERIE ILLINGWORTH , ELIZABETH MARTIN , ANNE STIBBS , JUDY PEARSALL , and SARA TULLOCH. "LORAN." The Oxford Dictionary of Abbreviations. 1998. Retrieved May 29, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O25-LORAN.html

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Free newspaper and magazine articles

	The rebirth of LORAN. Magazine article from: Interavia Business & Technology; 2/1/1999
	Football: Loran puts in the hours in battle to reclaim place.(Sport) Newspaper article from: Daily Post (Liverpool, England); 10/13/2004
	Court halts company's use of unapproved product from Russia. (Loran Medical... Magazine article from: FDA Consumer; 3/1/1998