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25 FEBRUARY 30 feet Access to U.S. Administration National Technical air cylinder Air embolism air flask apparatus is easily average person BLOCKNICK breathing resistance capable swimmer COMMERCE Technology Administration conscious effort conventional diving demand regulating valve demand valve depth of 30 detachable life line DETERMINATION OF CHARACTERISTICS diaphragm diver's lungs DIVING AND SWIMMING DIVING UNIT WASHINGTON Documents doffed easily easily donned electronic download Experimental Diving Unit FRENCH DESIGN ft3 per minute hydrostatic pressure inches of water inder Information Service Springfield lbs/in2 magnetic tape maximum vacuum microfiche and paper moderate MOLUMPHY mouthpiece is lost multimedia National Technical Information naval aviators Navy Experimental Diving NTIS collection OUTFIT OF FRENCH oxygen person at rest possible to swim qualified diver related business information Securi1y Classifica1ion SELF-CONTAINED DIVING shallow water surface SWIMMING OUTFIT Technical Information Service Technology Administration National THOMAS N U.S. DEPARTMENT U.S. Government Information U.S. Navy Submarine Unclassified vacuum required www.ntis.gov