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Cross section of a vessel with a single ballast tank at the bottom. A ballast tank is a compartment within a boat, ship or other floating structure that holds water, which is used as ballast to provide hydrostatic stability for a vessel, to reduce or control buoyancy, as in a submarine, to correct trim or list, to provide a more even load distribution along the hull to reduce structural ...
6,500 m (21,300 ft) Capacity. 680 kg (1,500 lb) payload. Crew. 3 (1 pilot, 2 scientific observers) Alvin (DSV-2) is a crewed deep-ocean research submersible owned by the United States Navy and operated by the Woods Hole Oceanographic Institution (WHOI) of Woods Hole, Massachusetts. The original vehicle was built by General Mills ' Electronics ...
A deep-submergence vehicle (DSV) is a deep-diving crewed submersible that is self-propelled. [citation needed] Several navies operate vehicles that can be accurately described as DSVs. DSVs are commonly divided into two types: research DSVs, which are used for exploration and surveying, and DSRVs (deep-submergence rescue vehicles), which are ...
A variable-buoyancy pressure vessel system is a type of rigid buoyancy control device for diving systems that retains a constant volume and varies its density by changing the weight (mass) of the contents, either by moving the ambient fluid into and out of a rigid pressure vessel, or by moving a stored liquid between internal and external variable-volume containers.
Retired modern submersible Star III of Scripps Institution of Oceanography. A submersible is an underwater vehicle which needs to be transported and supported by a larger watercraft or platform. This distinguishes submersibles from submarines, which are self-supporting and capable of prolonged independent operation at sea.
Unlike other deep submergence vehicles that use iron ballast to reach the ocean floor, the buoyancy and depth is adjusted by ballast tanks. [1] The Mir submersibles are 7.8 m long, 3.6 m wide, 3.0 m high, and weigh 18,600 kg (maximum payload is 290 kg). The personnel sphere's walls are 5 cm thick, and the inside diameter of the working area is ...
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