| http://www.w3.org/ns/prov#value | - Rebreather divers often carry a side-slung open-circuit bail out to be used in the event the rebreather fails.In technical diving, the diver may carry different equipment for different phases of the dive; some breathing gas mixes may only be used at depth, such as trimix and others, such as pure oxygen, which only may be used during decompression stops in shallow water.
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