A Diving rebreather is an underwater breathing apparatus that absorbs the carbon dioxide of a diver's exhaled breath to permit the rebreathing (recycling) of the substantially unused oxygen content, and unused inert content when present, of each breath. Oxygen is added to replenish the amount metabolised by the diver. This differs from open-circuit breathing apparatus, where the exhaled gas is discharged directly into the environment. The purpose is to extend the breathing endurance of a limited gas supply, and, for covert military use by frogmen or observation of underwater life, to eliminate the bubbles produced by an open circuit system. A diving rebreather is generally understood to be a portable unit carried by the user, and is therefore a type of self-contained underwater breathing apparatus (scuba). A semi-closed rebreather carried by the diver may also be known as a gas extender. The same technology on a submersible or surface installation is more likely to be referred to as a life-support system.
Diving rebreather technology may be used where breathing gas supply is limited, or where the breathing gas is specially enriched or contains expensive components, such as helium diluent. Diving rebreathers have applications for primary and emergency gas supply. Similar technology is used in life-support systems in submarines, submersibles, underwater and surface saturation habitats, and in gas reclaim systems used to recover the large volumes of helium used in saturation diving.
The recycling of breathing gas comes at the cost of technological complexity and additional hazards, which depend on the specific application and type of rebreather used. Mass and bulk may be greater or less than equivalent open circuit scuba depending on circumstances. Electronically controlled diving rebreathers may automatically maintain a partial pressure of oxygen between programmable upper and lower limits, or set points, and be integrated with decompression computers to monitor the decompression status of the diver and record the dive profile.
A Divingrebreather is an underwater breathing apparatus that absorbs the carbon dioxide of a diver's exhaled breath to permit the rebreathing (recycling)...
Rebreatherdiving is underwater diving using divingrebreathers, a class of underwater breathing apparatus which recirculate the breathing gas exhaled...
mixed gas rebreathers used for diving. Gas injection system failure is also mainly a problem of mixed gas divingrebreathers. Oxygen rebreathers gas injection...
and certification agency Rebreather diver – Scuba diving qualification to use a rebreatherRebreatherdiving – Underwater diving using self contained breathing...
Royal Navy for rebreatherdiving, Hamilton redefined technical diving as diving with more than one breathing gas or with a rebreather. Richard Pyle (1999)...
and designed for use with diving helmets. The first commercially practical scuba rebreather was designed and built by the diving engineer Henry Fleuss in...
Scuba diving is a mode of underwater diving whereby divers use breathing equipment that is completely independent of a surface breathing gas supply, and...
scuba diving – Self contained diving where gas is exhaled directly to the surroundings Rebreatherdiving – Underwater diving using self contained breathing...
registered from 1940 to 1989, was a rebreather and is different from the open-circuit diving regulator and diving cylinder assemblies also commonly referred...
offer mixed gas and rebreather training. TDI specializes in more advanced Scuba diving techniques, particularly diving with rebreathers and use of breathing...
Standard diving dress, also known as hard-hat or copper hat equipment, deep sea diving suit or heavy gear, is a type of diving suit that was formerly...
used for dives below 130 metres in commercial diving. Hydrox, a gas mixture of hydrogen and oxygen, is used as a breathing gas in very deep diving. Neox...
Sea, four divers were in a diving chamber system on the rig's deck that was connected by a trunk (a short passage) to a diving bell. The divers were Edwin...
refreshing in combatant diving with the Draeger LAR V rebreather. Mannequin wearing Finnish Navy combat diver equipment. The chest rebreather is likely a Viper...
Deep diving is underwater diving to a depth beyond the norm accepted by the associated community. In some cases this is a prescribed limit established...
environment Divingrebreather, where the diver carries the gas supply, and exhaled gas is recycled for further use, and Surface-supplied diving equipment...
unencumbered for work. In rebreatherdiving, bailout to open circuit is a procedure where the diver switches from breathing from the rebreather loop to open circuit...
A diving regulator or underwater diving regulator is a pressure regulator that controls the pressure of breathing gas for underwater diving. The most...
New South Wales. Shaw's first rebreather was an Inspiration closed circuit rebreather, with which he eventually dived to depths beyond its purported...
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