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The semi-closed rebreather systems developed by Drägerwerk in the early 20th century as a scuba gas supply for Standard diving dress, using oxygen or nitrox, and the US Navy Mark V Heliox helmet developed in the 1930s for deep diving, circulated the breathing gas through the helmet and scrubber by using an injector system where the added gas ...
A major difference between rebreather diving and open-circuit scuba diving is in fine control of neutral buoyancy. When an open-circuit scuba diver inhales, a quantity of highly compressed gas from their cylinder is reduced in pressure by a regulator, and enters the lungs at a much higher volume than it occupied in the cylinder.
Surface-supplied diving equipment may incorporate rebreather technology either as a gas reclaim system, where the surface-supplied breathing gas is returned and scrubbed at the surface, or as a gas extender carried by the diver. [18] [19] Rebreathers may also be used as self-contained diver bailout systems for either scuba or surface-supplied ...
The Halcyon RB80 is a non-depth-compensated passive addition semi-closed circuit rebreather of similar external dimensions to a standard AL80 scuba cylinder (11-litre, 207-bar aluminium cylinder, 185 mm diameter and about 660 mm long). It was originally developed by Reinhard Buchaly (RB) in 1996 for the cave exploration dives conducted by the ...
Rebreathers are generally used for scuba applications, but are also occasionally used for bailout systems for surface supplied diving. Rebreathers are more complex to use than open circuit scuba, and have more potential points of failure, so acceptably safe use requires a greater level of skill, attention and situational awareness, which is ...
Buoyancy control in scuba diving, also known as buoyancy control (scuba) – Essential safety skill; Buoyancy control equipment – Diving equipment primarily intended to modify buoyancy of the diver; Buoyancy control skills – Skills of maintaining neutral buoyancy on scuba; Buoyancy control with a rebreather – Closed circuit scuba diving skill
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