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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 possible meanings, depending on context.
Deep diving is underwater diving to a depth beyond the norm accepted by the associated community. In some cases this is a prescribed limit established by an authority, while in others it is associated with a level of certification or training, and it may vary depending on whether the diving is recreational , technical or commercial .
This is a glossary of technical terms, jargon, diver slang and acronyms used in underwater diving. The definitions listed are in the context of underwater diving. There may be other meanings in other contexts. Underwater diving can be described as a human activity – intentional, purposive, conscious and subjectively meaningful sequence of ...
1. Diving in special submersibles capable of withstanding the pressures of deeper parts of the ocean. The first dive of Otis Barton and William Beebe in their Bathysphere on June 11, 1930, to below 1400ft off Bermuda has been cited as the first deep-sea dive. [11] deep stops. See: Decompression theory#Thermodynamic model and deep stops
Any dive where the diver is decompressed directly after the dive. [25] 2. In recreational diving, a bounce dive is a descent to maximum depth and then a direct ascent back to the surface with minimal bottom time, in a dive profile resembling a spike. BOV. See: bailout valve. bowline. Main article: Bowline
The common term for a place at which one may dive is a dive site (from "dive" and "site", meaning "the place, scene, or point of an occurrence or event". [64]) As a general rule, professional diving is done where the work needs to be done, and recreational diving is done where conditions are suitable.
A noise inside the diver's head associated wth nitrogen narcosis in very deep air dives. [43] wall diving. See: Underwater diving#Diving environment. Recreational scuba diving along the face of a near vertical cliff wall, particularly if the bottom is below the range of the diver's equipment and certification. This requires good buoyancy ...
On June 22, 2012, the Jiaolong submersible set a deep-diving record for state-owned vessels when the three-person sub descended 6,963 meters (22,844 ft) into the Pacific Ocean. [ 7 ] Among the most well-known and longest-in-operation submersibles is the deep-submergence research vessel DSV Alvin , which takes 3 people to depths of up to 4,500 ...