Japanese oceanographer Noriyuki Nasu (left) shown here assisting a Japanese aqualung demonstrator, Nasu later worked at the University of Tokyo's Ocean Research Institute and he also was a co-chief scientist during Leg 57 of the Deep Sea Drilling Project. "Aqualung" was the original name for the first open-circuit scuba diving equipment; it consists of a high pressure diving cylinder and a diving regulator that supplies the diver with breathing gas at ambient pressure, via a demand valve. 1953
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