This manual establishes the standardized procedures, safety protocols, and technical requirements for conducting mixed-gas diving operations within the United States Navy. The text serves as a comprehensive operational guide, synthesizing decades of physiological research, decompression theory, and equipment engineering to ensure diver safety and mission success. It provides the authoritative framework for gas management, emergency response, and operational planning for specialized underwater environments.

Experts and professional divers recognize this manual as the definitive technical standard for high-pressure underwater operations. Readers frequently note the extreme density of the technical data and the requirement for specialized training to interpret the provided decompression algorithms correctly.