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carry a gas mask in slung position

Religious symbolism in the United States military — Insignias (left to right) for Christian, Muslim and Jewish chaplains are shown on the uniforms of three U.S. Navy chaplains, 1998. (These were the only insignias in use at that time.) Religious symbolism in the United States military includes the … Wikipedia
Scuba set — A scuba diver in usual sport diving gear A scuba set is an independent breathing set that provides a scuba diver with the breathing gas necessary to breathe underwater during scuba diving. It is much used for sport diving and some sorts of work… … Wikipedia
Diving regulator — and Octopus Other names Demand valve Uses Reduces pressurized breathing gas to ambient pressure and delivers it to the diver Inventor Manuel Théodore Guillaumet (1838), Benoît Rouquayrol (1860) … Wikipedia
Decompression (diving) — Divers decompressing in the water at the end of a dive Decompression in the context of diving derives from the reduction in ambient pressure experienced by the diver during the ascent at the end of a dive or hyperbaric exposure and refers to both … Wikipedia
Goa'uld technology in Stargate — This is a list of Goa uld technologies in the Stargate franchise. The Goa uld are the main adversaries for most of the run of Stargate SG 1 . They scavenged or conquered most of their advanced technologies from other races. However, there are… … Wikipedia