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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. Diving helmet - Wikipedia

   en.wikipedia.org/wiki/Diving_helmet

   An alternative to the diving helmet that allows communication with the surface is the full-face diving mask. These cover most of the diver's face, specifically including eyes, nose and mouth, and are held onto their head by adjustable straps. Like the diving helmet, the full-face mask is part of the breathing apparatus. [5]

4. Diving mask - Wikipedia

   en.wikipedia.org/wiki/Diving_mask

   A diving mask (also half mask, dive mask or scuba mask) is an item of diving equipment that allows underwater divers, including scuba divers, free-divers, and snorkelers, to see clearly underwater. [1] [2] Surface supplied divers usually use a full face mask or diving helmet, but in some systems the half mask may be used. [2]

5. Human factors in diving equipment design - Wikipedia

   en.wikipedia.org/wiki/Human_factors_in_diving...

   The volume of dead space is important for full-face masks and helmets, but not relevant to half masks as they are not part of the breathing passage. For breathhold diving, the mask internal volume must be equalised from the single breath in the diver's lungs, so a small volume is highly desirable, but scuba divers have sufficient air available ...

6. Surface-supplied diving equipment - Wikipedia

   en.wikipedia.org/wiki/Surface-supplied_diving...

   The two types of equipment have different ranges of application. Most full face masks are adaptable for use with scuba or surface supply. The full face mask does not usually have a bailout block fitted, and this is usually attached to the diver's harness, with a single hose to supply the mask from main or bailout gas which is selected at the block.

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