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2. Finswimming - Wikipedia

   en.wikipedia.org/wiki/Finswimming

   Surface finswimming (also known by its acronym, SF) is swimming on the surface of the water using mask, snorkel, and monofins.SF races are held for distances of 50, 100, 200, 400, 800, 1500, 4 × 50 mix relays (2 men's, 2 women's), 4 × 100 relays and 4 × 200 relays (meters) in swimming pools and over various long distances in the open water environment.

3. Full-face diving mask - Wikipedia

   en.wikipedia.org/wiki/Full-face_diving_mask

   A diver in a pool wearing an AGA full face mask A diver wearing an Ocean Reef full face mask Head protection helmet for use with Ocean Reef full face diving mask. A full-face diving mask is a type of diving mask that seals the whole of the diver's face from the water and contains a mouthpiece, demand valve or constant flow gas supply that provides the diver with breathing gas. [1]

4. Snorkel (swimming) - Wikipedia

   en.wikipedia.org/wiki/Snorkel_(swimming)

   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 ...

5. Timeline of diving technology - Wikipedia

   en.wikipedia.org/wiki/Timeline_of_diving_technology

   The timeline of underwater diving technology is a chronological list of notable events in the history of the development of underwater diving equipment.With the partial exception of breath-hold diving, the development of underwater diving capacity, scope, and popularity, has been closely linked to available technology, and the physiological constraints of the underwater environment.

6. Dacor (scuba diving) - Wikipedia

   en.wikipedia.org/wiki/Dacor_(scuba_diving)

   DACOR Corporation was a former American manufacturer of scuba diving equipment which was founded in 1954 by Sam Davison Jr. in Evanston, Illinois as "The Davison Corporation".

7. Underwater sports - Wikipedia

   en.wikipedia.org/wiki/Underwater_sports

   Finswimming is an underwater sport consisting of four techniques involving swimming with the use of fins either on the water's surface using a snorkel using either monofins or bifins (i.e. one fin for each foot) or underwater with monofin either by holding one's breathe or underwater using open circuit scuba diving equipment.