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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. List of diving hazards and precautions - Wikipedia

   en.wikipedia.org/wiki/List_of_diving_hazards_and...

   Use of a full face mask or diving helmet to protect the airway. [6] Use of surface-supplied diving equipment with voice communications. [7] [5] Adequate swimming skills and fitness for the circumstances. [8] Use of snorkel when appropriate. [8] Lifejackets that hold the wearer's face above the water may be worn when appropriate.

4. Diving mask - Wikipedia

   en.wikipedia.org/wiki/Diving_mask

   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. The half-mask is described here. [8]: 4–17 Diving masks may have a single, durable, tempered glass faceplate, or two lenses in front of the eyes ...

5. 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 ...

6. Snorkeling masks for your next underwater adventure - AOL

   www.aol.com/lifestyle/snorkeling-masks-next...

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7. Snorkeling - Wikipedia

   en.wikipedia.org/wiki/Snorkeling

   The 1950s US Divers "Marino" hybrid comprised a single snorkel mask with eye and nose coverage and a separate snorkel for the mouth. [4] Full-face snorkel masks use an integral snorkel with separate channels for intake and exhaled gases theoretically ensuring the user is always breathing untainted fresh air whatever the respiratory effort.