Abstract
The article provides information on the performance of diving work using the method of intense dives in marine conditions and defines the role and place of medical and physiological studies of the body functions of aquanauts during a long stay at great depths. Particular attention is paid to the prevention of diving diseases, measures to prevent infectious and inflammatory pathologies are reflected. The work and rest regime of aquanauts in marine conditions has been tested. Based on the experience gained, recommendations are given for the rational organization of the conduct and medical support of diving work at depths that are extreme for humans. The results of experimental diving descents show the reliability and high efficiency of the saturation diving method and the possibility of introducing it into the defense sector, including for rescuing personnel of damaged submarines and carrying out emergency work at emergency facilities.