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These include certification in cave diving, commercial diving, recreational diving, technical diving and freediving. Diver certification agencies are organisations which issue certification of competence in diving skills under their own name, and which train, assess, certify and register the instructors licensed to present courses following the ...
Scuba gas planning is the aspect of dive planning which deals with the calculation or estimation of the amounts and mixtures of gases to be used for a planned dive profile, and can be critical to the safety of the dive. The scuba diver by definition is independent of surface supply and, in general, must carry all gas needed for the dive, though ...
A fourth, logistical reason, is availability of cylinders of suitable capacity. The largest capacity cylinders in general use for scuba diving are 18 litre 232 bar steel cylinders, and they are relatively uncommon. Multiple cylinders may be chosen simply to provide sufficient capacity for the planned profile and specific gas.
Drift diving – Scuba diving where the diver is intentionally transported by the water flow; Inland diving – Diving in waters inland of the coastal high water mark. Reef diving – Recreational diving on a reef Artificial reef – Human-made underwater structure that functions as a reef
A scuba diving emergency is an incident while scuba diving, in which there is a high probability of death or severe injury if the problem is not resolved quickly. [149] A diving emergency may be related to life-support, [1] decompression stress and barotraume, [1] incapacitation or inability to cope, [150] or an acute medical problem. [118]
Diving disorders are medical conditions specifically arising from underwater diving. The signs and symptoms of these may present during a dive, on surfacing, or up to several hours after a dive. The principal conditions are decompression illness (which covers decompression sickness and arterial gas embolism ), nitrogen narcosis , high pressure ...