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Life SciencesMarine SciencesPhysiologyEnvironmental PhysiologyMarine PhysiologyVentilationAir-sea Gas ExchangeDiving PhysiologyDiving SafetyGas ExchangeRespiratory PhysiologyDecompression ExperimentsDecompression PhysiologyDecompression TheoryDive PhysiologyDive TimingDiver PhysiologyOxygen Saturation ModelingSaturation
Abstract : This report presents the theoretical basis for calculation of decompression schedules for nitrogen-oxygen and heliumoxygen mixtures used in diving. It includes definitions, theory of exponential saturation and desaturation, and theory of limiting values of excess saturation permitted at various ambient pressures with helium and nitrogen. An attempt has been made to simplify the presentation of the calculation procedure to implement the theoretical method. The necessary tables and worksheets used in calculations are presented, together with sample calculations of dive schedules. The discussion describes and appraises other methods of calculation developed in recent years.