An Oropesa is a streamlined towed body used in the process of minesweeping. The role of the Oropesa is to keep the towed sweep at a determined depth and position from the sweeping ship. [1] [2] [3] [4] Oropesa are standard devices used on Avenger-class mine countermeasures ships. [5]
The device derives its name from the ship on which it was developed, HMS Oropesa, a converted British Steam trawler. [6]
A naval mine is a self-contained explosive device placed in water to damage or destroy surface ships or submarines. Unlike depth charges, mines are deposited and left to wait until they are triggered by the approach of, or contact with, any vessel. Naval mines can be used offensively, to hamper enemy shipping movements or lock vessels into a harbour; or defensively, to protect friendly vessels and create "safe" zones. Mines allow the minelaying force commander to concentrate warships or defensive assets in mine-free areas giving the adversary three choices: undertake an expensive and time-consuming minesweeping effort, accept the casualties of challenging the minefield, or use the unmined waters where the greatest concentration of enemy firepower will be encountered.
A minesweeper is a small warship designed to engage in minesweeping. Using various mechanisms intended to counter the threat posed by naval mines, waterways are kept clear for safe shipping.
Minesweeping is the practice of the removal of explosive naval mines, usually by a specially designed ship called a minesweeper using various measures to either capture or detonate the mines, but sometimes also with an aircraft made for that purpose. Minesweeping has been practiced since the advent of naval mining in 1855 in the Crimean War. The first minesweepers date to that war and consisted of British rowboats trailing grapnels to snag the mines.
The paravane, a form of towed underwater "glider" with a warhead that was used in anti-submarine warfare, was developed from 1914–16 by Commander Usborne and Lieutenant C. Dennistoun Burney, funded by Sir George White, founder of the Bristol Aeroplane Company. It was used against naval mines and submarines.
The Aggressive-class minesweepers are a class of US-built minesweepers. They are designated as MSO, distinguishing them from the smaller coastal MSCs and inshore MSIs. Besides the US Navy, this class of vessels has also been used by the Belgian Navy and the Norwegian Navy, among others.
The Ton class were coastal minesweepers built in the 1950s for the Royal Navy, but also used by other navies such as the South African Navy and the Royal Australian Navy. They were intended to meet the threat of seabed mines laid in shallow coastal waters, rivers, ports and harbours, a task for which the existing ocean-going minesweepers of the Algerine-class were not suited.
The North Sea Mine Barrage, also known as the Northern Barrage, was a large minefield laid easterly from the Orkney Islands to Norway by the United States Navy during World War I. The objective was to inhibit the movement of U-boats from bases in Germany to the Atlantic shipping lanes bringing supplies to the British Isles. Rear Admiral Lewis Clinton-Baker, commanding the Royal Navy minelaying force at the time, described the barrage as the "biggest mine planting stunt in the world's history;" but larger fields containing more mines were laid during World War II.
USS Redstart (AM-378/MSF-378) was an Auk-class minesweeper commissioned by the United States Navy for service in World War II. Her task, as a fleet minesweeper, was to clear mines as the fleet proceeded into battle areas.
USS Tanager (AM-385) was an Auk-class minesweeper acquired by the United States Navy for the dangerous task of removing mines from minefields laid in the water to prevent ships from passing.
USS Velocity (AM-128) was an Auk-class minesweeper acquired by the United States Navy for the dangerous task of removing mines from minefields laid in the water to prevent ships from passing. She was the second warship to bear the name.
The Accentor-class minesweeper, sometimes called the Accentor/Acme-class minesweeper, was a small minesweeper used by the United States Navy during World War II. The Accentor-class minesweeper was designed for the sweeping of mines in harbors, bays, and other littoral waters.
USS Tanager (AM-5) was an Lapwing-class minesweeper acquired by the U.S. Navy for the dangerous task of removing mines from minefields laid in the water to prevent ships from passing.
USS Woodcock (AM-14) was an Lapwing-class minesweeper acquired by the United States Navy for the dangerous task of removing mines from minefields laid in the water to prevent ships from passing.
USS Scurry (AM-304) was a steel-hulled Admirable-class minesweeper constructed for the U.S. Navy during World War II. She was crewed by sailors who were trained in minesweeping, and quickly sent to the Pacific Ocean to clear minefields so that Allied forces could invade Japanese-held beaches. For this dangerous work, often under enemy fire, she was awarded four battle stars.
USS Auk (AM-38) was a Lapwing-class minesweeper acquired by the U.S. Navy after World War I for the task of removing mines that had been placed during the war.
The Royal Naval Patrol Service (RNPS) was a branch of the Royal Navy active during both the First and Second World Wars. The RNPS operated many small auxiliary vessels such as naval trawlers for anti-submarine and minesweeping operations to protect coastal Britain and convoys.
Operation End Sweep was a United States Navy and United States Marine Corps operation to remove naval mines from Haiphong harbor and other coastal and inland waterways in North Vietnam between February and July 1973. The operation fulfilled an American obligation under the Paris Peace Accord of January 1973, which ended direct American participation in the Vietnam War. It also was the first operational deployment of a U.S. Navy air mine countermeasures capability.
HMCS Mulgrave was a Bangor-class minesweeper that served with the Royal Canadian Navy during the Second World War. Entering service in 1942, the minesweeper took part in the Battle of the Atlantic and the invasion of Normandy. While sweeping for naval mines off France in 1944, the vessel hit one. The ship was towed back to port where Mulgrave was declared a constructive total loss. Laid up until the end of the war, the minesweeper was broken up in 1947.
Yangyang-class minesweeper is a ship class of minesweepers currently in service on the Republic of Korea Navy.
Vrienden van de Koninklijke Marine. , Mechanical minesweeping
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