[Deep immersion in the light of current scientific knowledge].

Physiological and technical problems related to deep diving are discussed. Starting from a brief summary of fundamental data, the Author deals with breathing mixture, the diver protection, copression rates and other various problems the principal syndromes originated by gases at high pressure in hyperbaric conditions. An analysis of the most important physical factors which can interfere with the tolerability for long period in such artificial athmospheres has been conducted.