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Cardiac events, hypoxia, and hyperoxia are the main causes of death where it is known with any confidence, and fatality rates have been estimated at 1.8 to 3.8 deaths per 100,000 dives or 1.2 to 2.5 deaths per 100,000 diving hours on rebreathers. [41] The data are limited, and assumed to be underreported, particularly from Asia. [41]
A commonly used system manufactured by Poisk uses three high-pressure composite cylinders filled to 260 Bar at 20 degrees Celsius. The dimensions of the cylinders are 19 inches (480 mm) long, 4.25 inches (108 mm) diameter, and weight under 2.7 kilograms (6.0 lb). At a two-liter per minute flow the cylinders last approximately 6.5 hours each. [7]
Trimix (breathing gas) Trimix is a breathing gas consisting of oxygen, helium and nitrogen and is used in deep commercial diving, during the deep phase of dives carried out using technical diving techniques, [1][2] and in advanced recreational diving. [3][4] The helium is included as a substitute for some of the nitrogen, to reduce the narcotic ...
The diver's mass on a typical dive does not generally change by what seems like much (see above—a typical dive-resort "aluminum 80" tank at 207 bars (3,000 psi) contains about 2.8 kilograms (6.2 lb) of air or nitrox, of which about 2.3 kilograms (5.1 lb) is typically used in a dive, although any air spaces such as in the BC and in diving ...
A rebreather is a breathing apparatus that absorbs the carbon dioxide of a user'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 user. This differs from open-circuit breathing ...
The timeline of underwater diving technology is a chronological list of notable events in the history of the development of underwater diving equipment.With the partial exception of breath-hold diving, the development of underwater diving capacity, scope, and popularity, has been closely linked to available technology, and the physiological constraints of the underwater environment.
British military electronically controlled closed circuit rebreather. The CDLSE ( Clearance Divers ' Life Support Equipment) is made by Divex in Aberdeen, Scotland. [1] It is an electronic closed circuit rebreather designed to be silent and non- magnetic. It allows diving to 60 metres (200 ft) using air as diluent, or up to 120 metres (390 ft ...
Aqualung Group (formerly Aqua Lung International, and prior to that La Spirotechnique) [1] is a manufacturer of self-contained breathing apparatus and other diving equipment. It produced the Aqua-Lung line of regulators, including the CG45 (1945) and the Mistral (1955). From its founding in 1946 until 2016, the company was a division of Air ...