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Nitrox and drysuit use, greater frequency of diving in the past year, increasing age, and years since certification were associated with lower risk, possibly as indicators of more extensive training and experience. [1] Statistics show diving fatalities comparable to motor vehicle accidents of 16.4 per 100,000 divers and 16 per 100,000 drivers.
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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] Maintaining a steady ascent rate at less than 60 feet per minute is challenging to scuba divers without an accurate depth reference.
The current no-limit world record holder is Herbert Nitsch with a depth of 214 metres (702 ft) set on 9 June 2007, in Spetses, Greece, [6] however, in a subsequent dive on 6 June 2012 in Santorini, Greece to break his own record, he went down to 253.2 metres (831 ft) and suffered severe decompression sickness immediately afterwards [7] and subsequently retired from competitive events.
One of the standard ways to help the diver to manage an emergency is to provide another diver ready to assist. In professional diving this is known as the stand-by diver, and in the case of bell diving, the bellman. [14] [75] In technical diving, similar roles may be filled by support divers.
Live-boating: Diving operations from a manually controlled vessel under way, which may use the propulsion system to maneuver during the dive, with associated hazards to the diver. The risk is greater with surface-supplied equipment as the umbilical is at risk during the whole dive, whereas a scuba diver is clear of the hazard zone when ...
Technical diver during a decompression stop. There is some professional disagreement as to what exactly technical diving encompasses. [10] [11] [12] It is an arbitrary distinction, and the line has been drawn in different places by different organisations, and has shifted on a few occasions.
A recreational diver may have a duty of care to another diver if one of these conditions occurs: [1]. The diver is the instructor of the other diver. [1] This is usually established by a contract or other agreement to teach the other diver how to dive, or some part of the skills and knowledge required for certification as a competent diver.
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