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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]
These may be worn with a full-face mask or half mask to provide impact protection when diving under an overhead, and may also be used to mount lights and video cameras. [3] [4] 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 ...
A prescription mask contains lenses mounted in the scuba mask frame or bonded to the original viewports. Diving helmets are often used for surface-supplied diving. They provide the same benefits as the full face mask but provide a very secure connection of the gas supply to the diver and additionally protect the head.
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 ]
The diver wears a full-face mask or helmet, and gas may be supplied on demand or as a continuous free flow. More basic equipment that uses only an air hose is called an airline or hookah system. [52] [50] [53] This allows the diver to breathe using an air supply hose from a high pressure cylinder or diving air compressor at the surface ...
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.
Samantha Cristoforetti demonstrating the use of the Valsalva device in the Sokol space suit. The Valsalva device is a device used in spacesuits, some full face diving masks, and diving helmets to allow astronauts and commercial divers to equalize the pressure in their ears by performing the Valsalva maneuver inside the suit without using their hands to block their nose.
The diver generally carries an emergency scuba gas supply connected to the helmet or bandmask at the bailout valve, or to the full-face mask via a bailout block. If the main gas supply fails, the diver opens the bailout valve and emergency gas is supplied through the same final delivery system that provides breathing gas under normal circumstances.
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