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Swimfins, swim fins, diving fins, or flippers are finlike accessories worn on the feet, legs or hands [1] and made from rubber, plastic, carbon fiber or combinations of these materials, to aid movement through the water in water sports activities such as swimming, bodyboarding, bodysurfing, float-tube fishing, kneeboarding, riverboarding, scuba diving, snorkeling, spearfishing, underwater ...
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This is a fin stroke for maintaining position and attitude at the surface, particularly while waiting for a pickup or taking a compass bearing. The fins are sculled from side to side using opening and closing motions of the legs, and the ankles rotated as best suited to the thrust needed to turn or hold the diver steady.
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.
Wall diving is reef diving where the main characteristic of the site is that the terrain is predominantly near vertical. It is basically an underwater cliff. The height of the wall can vary from a few metres to hundreds of metres. The top of the wall must be within diving depth, but the bottom may be far below or reasonably close to the surface.
Regional competition started in 1985. [1] The major areas for finswimming in the United States are Texas and California.In Texas, the following suburbs of Houston are claimed to have the largest concentration of finswimmers in the USA: Pasadena and Deer Park while in California, the area around the national headquarters for USA Finswimming in San Francisco is a centre of activity.