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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 […]

Gradient Factor Comparison Using A Simple 60m Trimix Dive Case-Study By Andy Davis. As a follow-up to my previous article, ‘A Logical Application of Gradient Factors Settings for Open-Circuit Tech Divers‘, I have decided to write a comparative case-study that illustrates the effect that three different gradient factor settings can have on the dynamics of […]

TDC-3 technical diving computer

The Best Technical Diving Computers 2019 by Andy Davis Here’s my list of the best open circuit technical diving computers on the market in 2019. Note: I am only including ‘true’ technical diving computers; because there are some awful impostors on the market nowadays.  Manufacturers may simply boast that a computer offers multiple gasses and/or […]