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Clearing a flooded demand valve is both a routine procedure and an emergency procedure. It is an emergency procedure because if the DV is not cleared, the diver could aspirate water and choke, but it can easily happen, and will happen when a diver switches to a different gas supply delivered through a different DV, and there are two easy ways to deal with it, so it should not be a problem on a ...
Standard diving skills include skills like buoyancy control, finning, mask clearing, pre-dive checks and diver communications. They are used all the time, and are seldom lost due to lack of practice. Usually the diver gets better at these skills over time due to frequent repetition.
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]
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 DIR view is that it is essential that divers master the skills of mask clearing, even if it takes many repetitions, as inability to adequately clear the mask leads to stress and distraction, and the dislodging of the mask during a stressful stage of a dive may then lead to panic. [25]
Visual check of the diver – check that the diver is fully dressed for the dive, with zips closed, weights in place, harness fastened and umbilical connected to helmet and harness, and if applicable, to the hot-water suit. In-water checks include: Breathing gas flow. Helmet or mask leaks. Dry suit leak check. Pneumofathometer bubble test.
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