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Scuba diving is a mode of underwater diving whereby divers use breathing equipment that is completely independent of a surface breathing gas supply, and therefore has a limited but variable endurance. [1] The word scuba is an acronym for "Self-Contained Underwater Breathing Apparatus" and was coined by Christian J. Lambertsen in a patent ...
Tec diving involves accelerated decompression and/or the use of variable gas mixtures during a dive." [20] NOAA defines technical diving as "all diving methods that exceed the limits imposed on depth and/or immersion time for recreational scuba diving. Technical diving often involves the use of special gas mixtures (other than compressed air ...
The science of underwater diving includes those concepts which are useful for understanding the underwater environment in which diving takes place, and its influence on the diver. It includes aspects of physics, physiology and oceanography. The practice of scientific work while diving is known as Scientific diving.
Scuba diver in Panama. Recreational diving may be considered to be any underwater diving that is not occupational, professional, or commercial, in that the dive is fundamentally at the discretion of the diver, who dives either to their own plan, or to a plan developed in consensus with the other divers in the group, though dives led by a professional dive leader or instructor for non ...
Scuba diving education levels as used by ISO, PADI, CMAS, SSI and NAUI Basic diving skills training in a swimming pool. Recreational diver training is the process of developing knowledge and understanding of the basic principles, and the skills and procedures for the use of scuba equipment so that the diver is able to dive for recreational purposes with acceptable risk using the type of ...
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
Routine scuba diving procedures (order may vary slightly, and some are also relevant to surface supplied diving, though details may vary): Dive planning – The process of planning an underwater diving operation. Selection of equipment – A diver is expected to be able select appropriate equipment and check it for fit and function.
The procedures vary depending on whether the diver is using scuba or surface supplied equipment. Scuba divers control their own descent and ascent rate, while surface supplied divers may control their own ascents and descents, or be lowered and lifted by the surface team, either by their umbilical, or on a diving stage, or in a diving bell.