Underwater diving
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Underwater diving, as a human activity, is the practice of descending below the water's surface to interact with the environment. It is also often referred to as diving, an ambiguous term with several
Surface-supplied divers riding a stage to the underwater workplace
Mild barotrauma to a diver caused by mask squeeze
Views through a flat mask, above and below water
Two very different modes of diving: Ambient pressure open circuit scuba diving (left) and atmospheric pressure diving in a pressure resistant suit (right)
Deep diving
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Deep diving is underwater diving to a depth beyond the normal range accepted by the associated community. In some cases this is a prescribed limit established by an authority, while in others it is as
Underwater diving
…disciplines to provide more scope for varied activities for which specialist training can be offered, such as cave diving, wreck diving, ice diving and deep diving. Several underwater sports are available for exercise and competition. There are various aspects of professional diving that range from part-time work…
Wreck diver Trevor Jackson using a rebreather with open circuit bailout cylinders returning from a 180-metre (590 ft) dive.
Technical divers preparing for a mixed-gas decompression dive. Note the backplate and wing setup with side mounted stage tanks containing EAN50 (left side) and pure oxygen (right side).
Closed circuit rebreather (AP Diving "Inspiration").