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minesweeper

 
Dictionary: mine·sweep·er   (mīn'swēp'ər) pronunciation
 
n.

A ship equipped for detecting, destroying, removing, or neutralizing explosive marine mines.

minesweeping mine'sweep'ing n.
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n. a warship equipped for detecting and removing or destroying tethered explosive mines.

See the Introduction, Abbreviations and Pronunciation for further details.

 

Naval vessel used to clear submarine mines from an expanse of water. In naval warfare, they are used to clear mines from sea-lanes to protect merchant shipping as well as to clear paths for warships to engage in battle or amphibious warfare. The earliest examples used sweeping wires with sawlike projections to cut the cables anchoring submarine mines and allow them to rise to the surface, where they would be destroyed by gunfire. The wide use of magnetic mines (set off by the magnetic field of steel ships) in the Korean War led to wood-hulled minesweepers.

For more information on minesweeper, visit Britannica.com.

 
US History Encyclopedia: Minesweeping
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Minesweeping, the systematic clearance of mines from an area where submarines, surface ships, or aircraft have planted them. Most minesweeping involves towing various devices behind a ship: serrated wires to cut the mooring lines of contact mines to bring them to the surface; noisemakers to detonate acoustic mines; and cables with a pulsating current to set off magnetic mines. No method for sweeping pressure mines exists, but generally they are set to sterilize themselves after a certain period, when they become harmless.

Minesweeping is a tedious and dangerous operation. During the Civil War, Union forces dragged for Confederate mines with chains strung between boats but failed to make mined areas completely safe. After World War I, during which the United States and Great Britain laid some 56,000 mines in a stretch of the North Sea 230 miles long and from fifteen to thirty-five miles wide, minesweepers spent months incompletely clearing the mines.

During World War II, combatants laid an estimated 500,000 mines in all the world's oceans. In European waters alone, more than 1,900 minesweepers spent approximately two years clearing mines. American minesweepers cleared some 17,000 square miles of water in the Japanese area.

No extensive mining operations have been conducted since World War II, although the North Koreans laid mines off both Korean coasts during the Korean War, and the U.S. Air Force dropped mines in Haiphong harbor during the Vietnam War. Minesweepers subsequently cleared both areas. Helicopters, which are faster, safer, and more efficient than ships, have virtually taken over minesweeping.

Bibliography

Lott, Arnold S. Most Dangerous Sea; A History of Mine Warfare and an Account of U.S. Navy Mine Warfare Operations in World War II and Korea. Annapolis, Md.: U.S. Naval Institute, 1959.

Marolda, Edward J., ed. Operation End Sweep: A History of Minesweeping Operations in North Vietnam. Washington, D.C.: Naval Historical Center, Department of the Navy, 1993.

 
Military Dictionary: minesweeping
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(DOD) The technique of clearing mines using either mechanical, explosive, or influence sweep equipment. Mechanical sweeping removes, disturbs, or otherwise neutralizes the mine; explosive sweeping causes sympathetic detonations in, damages, or displaces the mine; and influence sweeping produces either the acoustic and/or magnetic influence required to detonate the mine. See also minehunting.

 
Wikipedia: Minesweeper (ship)
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US Navy Admirable-class minesweeper USS Pivot in the Gulf of Mexico for sea trials on 12 July 1944

A minesweeper is a small naval warship designed to counter the threat posed by naval mines. Minesweepers generally detect then neutralize mines in advance of other naval operations. The dedicated, purpose-built minesweeper first appeared during World War I with the Flower-class minesweeping sloop.

Contents

Operation and requirements

Siegburg, a modern Ensdorf-class minesweeper of the German Navy

Minesweepers are equipped with mechanical or influence sweeps to detonate mines. The modern minesweeper is designed to reduce the chances of it detonating mines itself; it is soundproofed to reduce its acoustic signature and often constructed using wood, glass-reinforced plastic (GRP) or non-ferrous metal, or is degaussed to reduce its magnetic signature.

Mechanical sweeps are devices designed to cut the anchoring cables of moored mines, and preferably attach a tag to help the subsequent localization and neutralization. They are towed behind the minesweeper, and use a towed body (e.g. oropesa, paravane) to maintain the sweep at the desired depth and position. Influence sweeps are equipment, often towed, that emulate a particular ship signature, thereby causing a mine to detonate. The most common such sweeps are magnetic and acoustic generators.

There are two modes of operating an influence sweep: MSM (mine setting mode) and TSM (target setting mode or target simulation mode). MSM sweeping is founded on intelligence on a given type of mine, and produces the output required for detonation of this mine. If such intelligence is unavailable, the TSM sweeping instead reproduces the influence of the friendly ship that is about to transit through the area. TSM sweeping thus clears mines directed at this ship without knowledge of the mines. However, mines directed at other ships might remain.

The minesweeper differs from a minehunter; the minehunter actively detects and neutralises individual mines. Minesweepers are in many cases complementary to minehunters, depending on the operation and the environment; a minesweeper is, in particular, better suited to clearing open-water areas with large numbers of mines. Both kinds of ships are collectively called mine countermeasure vessels (MCMV), a term also applied to a vessel that combines both roles. The first such ship was HMS Wilton, also the first warship to be constructed from glass-reinforced plastic.

Minesweeping aircraft

A US Navy MH-53E minesweeping helicopter of HM-15 on USS Nassau

Aircraft can also be used for minesweeping. During World War II, fifteen British Vickers Wellington bombers were modified to carry a large magnetic induction loop and an electrical generator. The 'Directional Wireless Installation' (DWI), a cover story for the true purpose of the magnetic loop, was used successfully on May 10 1940 to sweep a path for the escape of the Dutch Royal Family to the UK. The DWI was used most successfully in the Mediterranean theatre, particularly over the Suez Canal and Alexandria Harbour. Their use revealed the limitations of the technique, in that it only works effectively in very shallow water (such as canals and harbours). From about 1943, German Junkers Ju 52 transports were similarly converted.

The MH-53E Sea Dragon helicopter, which tows a minesweeping sled, is used by the United States Navy for minesweeping.

Notable minesweepers

See also

External links


 
Translations: Minesweeper
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Dansk (Danish)
n. - minestryger

Nederlands (Dutch)
mijnenveger

Français (French)
n. - dragueur de mines

Deutsch (German)
n. - Minensuchboot

Ελληνική (Greek)
n. - (ναυτ.) ναρκαλιευτικό σκάφος

Italiano (Italian)
dragamine

Português (Portuguese)
n. - caça-minas (m)

Русский (Russian)
минный тральщик

Español (Spanish)
n. - dragaminas, barreminas

Svenska (Swedish)
n. - minsvepare

中文(简体)(Chinese (Simplified))
扫雷舰

中文(繁體)(Chinese (Traditional))
n. - 掃雷艦

한국어 (Korean)
n. - 소해정

日本語 (Japanese)
n. - 掃海艇

العربيه (Arabic)
‏(الاسم) كاسحه ألغام‏

עברית (Hebrew)
n. - ‮שולת-מוקשים‬


 
 

 

Copyrights:

Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2007. Published by Houghton Mifflin Company. All rights reserved.  Read more
US Military Dictionary. The Oxford Essential Dictionary of the U.S. Military. Copyright © 2001, 2002 by Oxford University Press, Inc. All rights reserved.  Read more
Britannica Concise Encyclopedia. Britannica Concise Encyclopedia. © 2006 Encyclopædia Britannica, Inc. All rights reserved.  Read more
US History Encyclopedia. © 2006 through a partnership of Answers Corporation. All rights reserved.  Read more
Military Dictionary. US Department of Defense Dictionary of Military and Associated Words, 2003.  Read more
Wikipedia. This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Minesweeper (ship)" Read more
Translations. Copyright © 2007, WizCom Technologies Ltd. All rights reserved.  Read more

 

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