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USS Regulus hard aground in 1971 due to a typhoon: after three weeks of effort, Naval salvors deemed it unsalvageable.. Marine salvage takes many forms, and may involve anything from refloating a ship that has gone aground or sunk as well as necessary work to prevent loss of the vessel, such as pumping water out of a ship—thereby keeping the ship afloat—extinguishing fires on board, to ...
Vertical transom and stern of a modern cargo ship. In some boats and ships, a transom is the aft transverse surface of the hull that forms the stern of a vessel. Historically, they are a development from the canoe stern (or "double-ender") wherein which both bow and stern are pointed. Transoms add both strength and width to the stern.
The Mil-HDBK-217 reliability calculator manual in combination with RelCalc software (or other comparable tool) enables MTBF reliability rates to be predicted based on design. A concept which is closely related to MTBF, and is important in the computations involving MTBF, is the mean down time (MDT). MDT can be defined as mean time which the ...
A cost estimator is the professional who prepares cost estimates. There are different types of cost estimators, whose title may be preceded by a modifier, such as building estimator, or electrical estimator, or chief estimator. Other professionals such as quantity surveyors and cost engineers may also prepare cost estimates or contribute to cost
Mean time to repair (MTTR) is a basic measure of the maintainability of repairable items. It represents the average time required to repair a failed component or device. [ 1 ] Expressed mathematically, it is the total corrective maintenance time for failures divided by the total number of corrective maintenance actions for failures during a ...
A repair ship is a naval auxiliary ship designed to provide maintenance support to warships. Repair ships provide similar services to destroyer , submarine and seaplane tenders or depot ships , but may offer a broader range of repair capability including equipment and personnel for repair of more significant machinery failures or battle damage.
Ship stability illustration explaining the stable and unstable dynamics of buoyancy (B), center of buoyancy (CB), center of gravity (CG), and weight (W)
Equine ships (馬船; Mǎ Chuán), carrying horses and tribute goods and repair material for the fleet, eight-masted, 37 by 15 zhang, about 103 m (338 ft) long and 42 m (138 ft) wide. Supply ships ( 糧船 ; Liáng Chuán ), containing staple for the crew, seven-masted, 28 by 12 zhang , about 78 m (256 ft) long and 35 m (115 ft) wide.