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Parbuckling a cask up an incline. While the mechanical advantage used by a laborer to parbuckle a cask up an incline is 2:1, parbuckling salvage is not so limited. Each of the 21 winches used to roll the Oklahoma used cables that passed through two 17-part tackle assemblies (17:1 advantage).
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.
Mine warfare consists of: minelaying, the deployment of explosive naval mines at sea to sink enemy ships or to prevent their access to particular areas; minesweeping, the removal or detonation of naval mines; and degaussing, the process of decreasing or eliminating a remnant magnetic field in a ship's hull to prevent its detection by magnetic mines.
In the early 1980s, the U.S. Navy began development of a new mine countermeasures (MCM) force, which included two new classes of ships and minesweeping helicopters.The vital importance of a state-of-the-art mine countermeasures force was strongly underscored in the Persian Gulf during the eight years of the Iran–Iraq War, and in Operations Desert Shield and Desert Storm in 1990 and 1991 when ...
A US Navy work diver is lowered to the sea bed during a dive from the USNS Grasp off the coast of St. Kitts. Preparing to raise a mine from the seabed. A clearance diver was originally a specialist naval diver who used explosives underwater to remove obstructions to make harbours and shipping channels safe to navigate, but the term "clearance diver" was later used to include other naval ...
As 1919 drew to a close, the onset of winter forced the suspension of sweeping for moored buoyant mines, but the Royal Navy resumed minesweeping operations the following spring, continuing to clear sunken mines from fishing grounds, and maintaining a destroyer patrol to track down mines that had broken free of their moorings and gone adrift. [19]
A Trawler Section of the Royal Navy Reserve became the predecessor of the mine sweeping forces with specially designed ships and equipment to follow. These reserve Trawler Section fishermen and their trawlers were activated, supplied with mine gear, rifles, and uniforms, and paid as the first minesweepers. [ 4 ]
The M58 mine-clearing line charge (MICLIC) is a rocket-projected mine-clearing line charge used to provide a "close-in" demining capability for maneuver forces of the United States Army and Marine Corps. [1] [2] [3] First fielded in 1988 with United States Army Europe, [4] the MICLIC is a cable fitted with explosive charges.