bounce and saturation limit points; consistent diving protocols for altitude; deep stops for decompression, extended range, and mixed gas diving with overall shorter decompression times, particularly in the shallow zone; use of helium rich mixtures for technical diving, with shallower isobaric switches to nitrox than suggested by Haldanian strategies; use of pure oxygen in the shallow zone to efficiently eliminate both dissolved and bubble phase inert gases. References Decompression algorithms