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Weight belts are the most common weighting system currently in use for recreational diving. [17] Weight belts are often made of tough nylon webbing, but other materials such as rubber can be used. Weight belts for scuba and breathhold diving are generally fitted with a quick release buckle to allow the dumping of weight rapidly in an emergency. [7]
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.
Heavy metals are used for ballast in boats, [137] aeroplanes, [138] and motor vehicles; [139] or in balance weights on wheels and crankshafts, [140] gyroscopes, and propellers, [141] and centrifugal clutches, [142] in situations requiring maximum weight in minimum space (for example in watch movements).
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 ...
Tungsten (also called wolfram) [14] [15] is a chemical element; ... Now tungsten is used in many more applications such as aircraft and motorsport ballast weights ...
A shotline with spar buoy to reduce vertical movement near the surface in a seaway. A diving shot line, shot line, or diving shot, a type of downline or descending line (US Navy), [1] is an item of diving equipment consisting of a ballast weight (the shot), a line and a buoy. The weight is dropped on the dive site.
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.
In most racing series, cars have a minimum allowable weight. Often, the actual weight of the car is lower, so ballast is used to bring it up to the minimum. The advantage is that the ballast can be positioned to affect the car's handling by changing its load distribution. This is near-universal in Formula 1. It is also common in other racing ...
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