Diving Method and Apparatus
"A method and apparatus for carrying out underwater operations with the aid of diving apparatus provided with at least a living compartment, a decompression compartment, a water-lock compartment and a working compartment. The diving apparatus is lowered into the water to an operating depth at which a gas pressure approximately equal to the static water pressure at the operating depth is maintained in the working compartment." 1968
Invented by Frederick J. Chate and Steven A. T. Kapteyn
