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Tag Archive: trimix


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 […]

I’m helping to arrange an ANDI Trimix course for later in October. The instructor is very highly regarded (cave pioneer) and will have time to run a Trimix course during a stop-over in Subic Bay. This would be a world-class training opportunity, with a well respected agency and premier league instructor. Prerequisites are: Extended Range […]