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decompression tables 136179
io SELFCONTAINED AND ARMOURED DIVING APPARATUS 204213B
THE SUBMARINE OBSERVATION CHAMBER 214220
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60 feet absorbent Admiralty air supply air-lock air-pipe armoured ascent atmospheres boat bottom breast-rope breathing apparatus buoyancy cable Captain carbon dioxide carried charge cofferdam compartment compressed air compressors connected corselet crew cubic feet cylinders Davis deck Decompression Chamber decompression tables deep diving depth designed diameter diver diving apparatus diving bell diving dress diving pump diving-bell diving-dress equipment escape apparatus explosive fathoms fitted floating flooded frogman gauge Gorman & Co.'s hatch helium helmet hole Human Torpedo injector inside J. B. S. Haldane joints lamp lifting lower lungs metal method mins minutes mixture Navy nitrogen observation chamber operations oxygen poisoning pipe plate pontoons position pressure pump reducing valve Royal Navy rubber salvage screwed sea-bed self-contained ship ship's shot rope side Siebe square inch steel stop submarine submerged sunk surface tank telephone tide tons torpedo tube underwater vessel watertight weight wire wreck