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loran
Loran-C
The Oxford Companion to Ships and the Sea
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2006
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© The Oxford Companion to Ships and the Sea 2006, originally published by Oxford University Press 2006. (Hide copyright information)
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Loran-C. Loran is an acronym for long-range
navigation, a
hyperbolic navigation system first proposed in the 1930s and implemented as the British Gee system in the early days of the Second World War (1939–45) to home bombers onto their targets. It was further developed by the radiation laboratory of the Massachusetts Institute of Technology, and by 1943 a chain of transmitters was in operation under the control of the
US Coast Guard. This became known as Loran-A, which was phased out in the USA in 1980. It is anticipated that in due course all Loran-A stations will be replaced by Loran-C ones. The system probably provides the best combination of accuracy and coverage area of any system yet devised for fixing a position by means of earth-based transmitting stations. It is favoured in some quarters as a possible earth-bound back-up for
GPS. There are some 30 Loran-C/Chakya chains, operated jointly by the Americans and Russians, each made up of three to five transmitter stations comprising one master and two secondary transmitters. Four Loran-C chains cover much of north-west Europe. As with all hyperbolic navigation systems the position is plotted by means of a lattice
chart and transferred to the nautical chart in use. See also
consol;
decca;
omega.
Mike Richey
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Loran gets a witness.(Radio Technical Commission for Maritime Services contracts with Loran Inc.)
Magazine article from: GPS World; 3/1/2007; ; 700+ words
; ...in responding to the request for comments on Loran. See http://dms.dot.gov. RTCM comments...adopted a position in support of maintaining the Loran-C system, and its modernization to e-Loran standards. Loran provides an important backup...
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Loran is reborn as backup to GPS: Si-Tex's new sensor sidesteps the risk of signal jams.(Product roundup)
Magazine article from: National Fisherman; 7/1/2008; ; 700+ words
; ...Coast Guard has wanted to get rid of loran C for some time now--which is probably...number of electronics companies dropped loran receivers from their product line. And just when you thought well, yes, loran is history, the government reversed...
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Loran repeatability better than GPS. (Global Positioning System receivers)
Magazine article from: Trailer Boats; 4/1/1994; ; 700+ words
; ...mariners are beginning to think that the lowly Loran set is nothing more than an outdated box...transistors. Wrong! Did you know that Loran repeatability--the capability of memorizing...we lost our Rolex overboard as close as Loran will. It is the Department of Defense...
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GPS + LORAN-C: performance analysis of an integrated tracking system.
Magazine article from: GPS World; 7/1/2006; ; 700+ words
; ...provided by a system that integrates GPS with enhanced LORAN-C (eLORAN) and dead reckoning (DR). An important issue for the integrated GPS/LORAN system is how well LORAN and DR systems can supplement GPS when the GPS signal...
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Count on loran for accuracy.
Magazine article from: Trailer Boats; 5/1/1993; ; 700+ words
; ...that GPS is "in," some mariners may think that Loran is "out." Not so. Excellent Loran coverage is found throughout the United States...several hundred miles offshore. Despite rumors of Loran turnoff, the federal radio navigation plan calls...
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A strong case for Loran.(marine navigation electronics)
Magazine article from: Trailer Boats; 3/1/1996; ; 700+ words
; ...positioning system (GPS) is here, many mariners are pulling off their older Loran equipment and giving it away. If someone wants to give you an old Loran set, take it! A Loran receiver operated for "repeatability" of a past position or run for precise...
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The rebirth of LORAN.
Magazine article from: Interavia Business & Technology; 2/1/1999; ; 700+ words
; ...possibly longer Reports of the death of LORAN-C as an aviation navigation aid appear...for the operation and maintenance of the LORAN system in the USA. Of the $10 million...said it would need in FY00 to fully update LORAN, or the single year amount it would need...
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The rebirth of LORAN
Magazine article from: Interavia; 2/1/1999; ; 700+ words
; ...possibly longer Reports of the death of LORAN.C as an aviation navigation aid appear...for the operation and maintenance of the LORAN system in the USA. Of the $10 million...said it would need in FY00 to fully update LORAN, or the single year amount it would need...
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Editor's Note: E-Loran Time?
Magazine article from: Avionics Magazine; 11/15/2006; 700+ words
; ...GPS, has singled out this candidate--Loran--in referring to the need for a GPS...160 million for the modernization of Loran as a possible GPS backup. In their report...sending a message. The opposite of GPS, Loran is a low-frequency, relatively high...
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 "Post-Tribune (IN)")
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VIDEOTAPE TAKES MYSTERY FROM LORAN-C OPERATION
Newspaper article from: Post-Tribune (IN); 2/6/1988; 700+ words
; ...to use LOPs or longitude-latitude for Loran-C navigation. (Chart by National Oceanic...Administration) New for 1988 is the Si-Tex 790 Loran-C. It has 99 waypoint memory, five...boaters who have heard of the marvels of Loran-C. And believe me - they are marvels...
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Loran
Encyclopedia entry from: The Gale Encyclopedia of Science
Loran LORAN (Long Range Navigation) is a radio-based navigational aid first used...with greater accuracy than could be achieved with conventional techniques. LORAN determines location by comparing accurately-synchronized powerful radio...
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Loran-C
Book article from: The Oxford Companion to Ships and the Sea
Loran-C. Loran is an acronym for long-range navigation , a hyperbolic navigation system...operation under the control of the US Coast Guard . This became known as Loran-A, which was phased out in the USA in 1980. It is anticipated that...
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loran
Book article from: The Columbia Encyclopedia, Sixth Edition
loran , long-range, accurate radio navigational system used...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...
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Lowrance Electronics, Inc.
Book article from: International Directory of Company Histories
...advanced features, such as Advanced Signal Processing (ASP) and Loran-C circuitry, as well as 18 interchangeable transducers...boaters. Lowrance also designs, manufactures, and markets Loran-C receivers and sonar accessories, such as mountings. Since...
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Radar
Book article from: American Decades
...aircraft for patrol along critical American coastal sea lanes. Loran By March 1942, B-18 bombers and naval destroyers equipped...from the coast. During 1942 Rad Lab physicists also developed loran (long-range navigation) radar for in-flight navigation...
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