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A snorkel is used to allow the user to breathe atmospheric air when their face is immersed in water while swimming or floating at the surface. [1] To work effectively, the snorkel must allow the user to inhale and exhale comfortably over an extended period, and provide a sufficient volume of air with appropriate oxygen and carbon dioxide content to maintain a sufficient and comfortable ...
Dive RAID International (formerly RAID) is a dive training organization which was founded in 2007 to support diver training for the Poseidon Mk VI Discovery Rebreather.It has since extended its scope to include open circuit scuba training and training for both recreational and technical diving sectors as well as snorkeling and freediving.
The National Association of Underwater Instructors (NAUI Worldwide) is a nonprofit association of scuba instructors founded in 1960 by Albert Tillman and Neal Hess. [2] [3]NAUI primarily serves as a recreational dive certification and membership organization, providing international diver standards and education programs.
A trial course was run during the late 1954 and early 1955 by YMCA of the USA using this outline. The material used in the course was then published in The Science of Skin and SCUBA Diving (or The New Science of Skin and SCUBA Diving as some sources suggest) during 1957. YMCA of the USA then developed its own program of underwater diving ...
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 ...
Snorkeling is an activity in its own right, as well as an adjunct to other activities, such as breath-hold diving, spearfishing and scuba diving, [27] and several competitive underwater sports, such as underwater hockey and finswimming. In all cases, the use of a snorkel facilitates breathing while swimming at the surface and observing what is ...
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Fins and a diving mask are often used in free diving to improve vision and provide more efficient propulsion. A short breathing tube called a snorkel allows the diver to breathe at the surface while the face is immersed. Snorkelling on the surface with no intention of diving is a popular water sport and recreational activity. [38] [44]
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