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2. 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]

3. 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 ...

4. Snorkeling - Wikipedia

   en.wikipedia.org/wiki/Snorkeling

   New-generation snorkel masks are full-face masks covering the eyes, the nose, and the mouth. They enable surface snorkelers to breathe nasally or orally and may be a workaround in the case of surface snorkelers who gag in response to the presence of standard snorkel mouthpieces in their mouths. Some early snorkel masks are full-face masks ...

5. Diving mask - Wikipedia

   en.wikipedia.org/wiki/Diving_mask

   Disassembled components of a single-window, low-volume dive mask Assembled diving half-mask showing the retaining strap. There are two basic categories of diving mask: The half mask covers the eyes and nose, and the full face mask covers eyes, nose and mouth, and therefore includes a part of the breathing apparatus.

6. Underwater diving - Wikipedia

   en.wikipedia.org/wiki/Underwater_diving

   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]

7. Unsolved mysteries: The missing persons cases haunting the ...

   www.aol.com/unsolved-mysteries-missing-persons...

   He "was an advanced certification diver in a full wetsuit, mask, fins, and snorkel so close to the boat," according to the CUE Center. "What happened to him remains a mystery."