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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]
Full-face mask, Swimming goggles. 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 ...
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.
A full-face mask may allow the diver to breathe through the nose or mouth as preferred. The demand valve adds a little respiratory dead space to the airway. The work of breathing is greater due to hydrostatic pressure differences between the depth of the demand valve and the lungs, and due to cracking pressure and flow resistance in the demand ...
Having a small internal orinasal mask inside the main mask, which separates the external respiratory passage from the rest of the mask interior. In a few models of full face mask a mouthpiece like those used on diving regulators is fitted, which has the same function as an oro-nasal mask, but can further reduce the volume of the external dead ...
Aqua-Lung[ 1 ] was the first open-circuit, self-contained underwater breathing apparatus (or "scuba") to achieve worldwide popularity and commercial success. This class of equipment is now commonly referred to as a twin-hose diving regulator, [ 2 ] or demand valve. The Aqua-Lung was invented in France during the winter of 1942–1943 by two ...
Inhaling from a mouthpiece becomes second nature very quickly. The other common arrangement is a full-face mask which covers the eyes, nose and mouth, and often allows the diver to breathe through the nose. Professional scuba divers are more likely to use full-face masks, which protect the diver's airway if the diver loses consciousness. [43]
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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