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ATNA is a new designed diving equipment for non professional people to underwater walking, it is composed by three main parts: diving helmet(glass helmet), cuirass joined with neoprene and the oxygen cylinder. Unlike the usual one, ATNA also isolates the water till the chest with the cuirass, that prevent water from directly contacting the body. That made people to breath more comfortable underwater. The oxygen cylinder inserts into the cuirass and hitch up. The whole diving equipment is just like a soap bubble, diver can freely breath and easy walk underwater in it. The sphericity Helmet also offers an unbounded viewing under water.