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Two additional chambers, located below the gunwale on either side and called "speed skags," provide cushioning for the boat's occupants and additional buoyancy in case of pressure loss in the hull. The final chamber is an inflatable keel tube which runs the length of the craft and gives the bottom of the hull a "V" shape, imparting directional ...
Tanks listed as suitable for outdoor service are protected from UV attack by: coloring or pigmenting and/or adding internal stabilizers which preferentially absorb or dissipate the UV energy. Shading tanks from the sun will also prevent deterioration. Tanks must be free to expand or contract, avoid excessive tension on the tank.
A composite overwrapped pressure vessel (COPV) is a vessel consisting of a thin, non-structural liner wrapped with a structural fiber composite, designed to hold a fluid under pressure. The liner provides a barrier between the fluid and the composite, preventing leaks (which can occur through matrix microcracks which do not cause structural ...
Absolute pressure: At sea level the atmosphere exerts a pressure of approximately 1 bar, or 103,000 N/m 2. Underwater, the pressure increases by approximately 0.1 bar for every metre of depth. The total pressure at any given depth is the sum of the pressure of the water at that depth (hydrostatic pressure)and atmospheric pressure. This combined ...
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.
Anti tank (LAV-AT) 106 Self-propelled mortar (LAV-M) 65 Light Nuclear, Biological, and Chemical Reconnaissance (LAV-JSLNBCRS) 31 AAV-7: United States: Armoured personnel carrier: Amphibious armoured personnel carrier (AAV-7A1) 1,200 To be replaced by ACV. Recovery (AAVRA1) 60 Self-propelled artillery M142 HIMARS: United States: Rocket artillery
Tank classification is a taxonomy of identifying either the intended role or weight class of tanks.The classification by role was used primarily during the developmental stage of the national armoured forces, and referred to the doctrinal and force structure utility of the tanks based on design emphasis.
Bathyscaphe Trieste before its only dive into the Mariana Trench The Trieste in 1958. A bathyscaphe (/ ˈ b æ θ ɪ ˌ s k eɪ f,-ˌ s k æ f /) is a free-diving, self-propelled deep-sea submersible, consisting of a crew cabin similar to a Bathysphere, but suspended below a float rather than from a surface cable, as in the classic Bathysphere design.