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Emergency free ascent (EFA) is like a controlled emergency swimming ascent without a regulator in the mouth. It is considered unacceptably hazardous for training purposes by some agencies. [6] [7] Emergency swimming ascent (ESA) is a free ascent where the diver swims to the surface at either negative or approximately neutral buoyancy.
Controlled emergency swimming ascent; D. Diver rescue; E. Emergency air sharing; Emergency ascent; Emergency breathing gas sharing; Emergency buoyant ascent;
Controlled emergency swimming ascent – Ascent where there may be a small amount of breathing gas which becomes available due to ambient pressure reduction. Cut free from entanglement. Ditch weights to establish buoyancy – Removal of some or all ballast weights to establish neutral or positive buoyancy underwater, or to establish positive ...
The procedures are intended to limit risk of barotrauma of ascent and decompression sickness, while maintaining an efficient ascent profile. One of the most important criteria for a controlled ascent is control of the ascent rate, both during the periods of active ascent (pulls), and periods of staged decompression (stops). [5]
The emergency plan, (or emergency action plan), should be specific to the dive plan where applicable, as specific actions should be detailed where possible and depend on the circumstances of the dive plan. As much detail as reasonably practicable can save time during an emergency, when it avoids the need to make detailed plans at the time.
Controlled emergency swimming ascent (CESA) – Emergency procedure for scuba divers when out of air; Coral reef – Outcrop of rock in the sea formed by the growth and deposit of stony coral skeletons; Coral Reef Alliance – Non-profit, environmental NGO focused on protecting coral reefs
Emergency procedure – Plan of action to deal with an emergency; Emergency Response Diving International (ERDI) – American organisation for training and certification of emergency response divers; Emergency response plan – Action to be taken in specific emergencies; Emergency swimming ascent (ESA) – Emergency procedure used by scuba divers
A pony bottle or pony cylinder is a small diving cylinder which is fitted with an independent regulator, and is usually carried by a scuba diver as an auxiliary scuba set.In an emergency, such as depletion of the diver's main air supply, it can be used as an alternative air source or bailout bottle to allow a normal ascent in place of a controlled emergency swimming ascent.