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The tank is capped by a vent riser, a pipe coming out of the top of the tank that terminates at a Kingston valve. In the vent riser is a valve that when shut, prevents flooding the tank when the submarine is rigged for surface. When the sub is rigged for dive, this valve is opened and flooding the tank becomes an option. Normally, the tank is ...
Many marine vessels do not provide a way for captain and crew to measure and monitor fuel usage while underway. An optimum system onboard would include the ability to instantaneously monitor fuel burn rates from the wheelhouse. Individual engine and generator burn rates would be included, as well as fuel tank levels.
The vents of the Redoutable are under the casing. The square openings in the casing are limber holes to facilitate draining the superstructure. In submarine technology a vent is a valve fitted to the top of a submarine's ballast tanks to let air escape from the top of the ballast tank and be replaced by water entering through the opening(s) called "flood ports" or "floods" at the bottom of the ...
The fuel tank holds 33 U.S. gallons (120 L; 27 imp gal) and the fresh water tank has a capacity of 90 U.S. gallons (340 L; 75 imp gal). [1] Ventilation consists of four opening ports in the main cabin, plus two in the bow cabin. There is a dorade vent over the head.
The tank is supported around its circumference by the equatorial ring, which is supported by a large circular skirt, known as a data-couple that is a unique combination of aluminum and steel, which takes the weight of the tank down to the ship's structure. This skirt allows the tank to expand and contract during cool-down and warm-up operations.
The vapors which are displaced from the fuel tank by the incoming fuel are routed via the vapor vent line to the canister and are absorbed by activated carbon. These canisters are made of either steel or plastic. The size of this canister is tailored to accommodate expected evaporative emissions.