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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 hogging or sagging ...
The advantage of water ballast is that the tanks can be emptied, reducing draft or the weight of the boat (e.g. for transport on ground) and water added back in (in small boats, simply by opening up the valves and letting the water flow in) after the boat is launched or cargo unloaded.
Ballast, other than cargo, may be placed in a vehicle, often a ship or the gondola of a balloon or airship, to provide stability. A compartment within a boat, ship, submarine, or other floating structure that holds water is called a ballast tank. Water should be moved in and out from the ballast tank to balance the ship.
Ballast is a simple term for weight. When wakeboard boats have ballast tanks, it means that they have room for extra weight to weigh the boat down for larger wakes. For example. If the rider is surfing on the starboard side of the stern. Then you want to activate the starboard ballast in order to give the rider a surf-able wave.
On vintage submarines, Kingston valves are fitted at the bottom of certain ballast tanks, such as safety, negative, and bow buoyancy tanks. The submarine's ballast tank valves are used to admit water when the submarine dives. The valves allow water to enter the ballast tanks, while the enclosed air escapes through the open main vents at the top ...
The saddle tank was formed by moving the ballast tanks outside the pressure hull. [1] Early designs raised the weather deck and casing above the pressure hull, producing a ballast tank that wrapped around the upper part of the pressure hull (diagrams A & B). Following the terminology of steam railway locomotives, this was termed a "saddle tank".
The lower tanks are connected to these ballast tanks by non-return valves. The United States Coast Guard does not allow this design to enter US waters, effectively preventing it from being built. [citation needed] When a lower tank is damaged, the incoming sea water pushes the oil in the damaged tank up into the ballast tank.
The ballast tanks increase the weight of the boat while the waveplates redirect water to create a larger and smoother surf wave on either side of the boat. [9] The exhaust is pointed downward directly in the water path of the propeller, this sends the carbon monoxide exhaust far behind the surfer that is riding behind the boat. [10] [11]