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Tag Archive: hpns


Deep Diving Maladies – High-Pressure Nervous Syndrome by Andy Davis HPNS or High-Pressure Nervous Syndrome (also called High-Pressure Neurological Syndrome)  can onset beyond a depth of 150m/500ft when using heliox or trimix breathing gasses. The severity of High-Pressure Nervous Syndrome is determined by the speed of descent (rate of compression), depth attained (absolute pressure) and […]

Scuba World Depth Records – Science versus the Human Factor – Perspective on the future of scuba world depth records; the issue of human versus scientific & technological limitations on extreme diving depth.  by Andy Davis The way I see it, there are two ‘types’ of serious world records; those primarily dependent on human factors […]