In 1961 Hannes Keller demonstrated within 14 days in Toulon and Washington two dives to a depth of 215 m and one to 300 m. These exposures to high pressures with their lack of effect on mental and physical competence indicated a break through for deep diving with helium, with which difficulties had arisen during decompression in earlier trials. The specialists were impressed less by the depths reached than by the rapid decompression without unpleasant sequelae for the diver.
KeywordsDecompression Sickness Physical Competence Deep Diving Rapid Decompression Gradual Compression
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