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Tag Archive: deep


The Value of Progressive Scuba Training – ‘Putting Another Dollar In’. by Andy Davis When I talk with divers and read the online scuba forums I see a lot of scepticism about progressive scuba training courses. Novice divers often question the value of courses X, Y or Z.  Many intermediate and advanced divers will profess […]

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Scuba Q and A: How Deep Can You Dive Using Air? Q. How deep can someone scuba dive using normal air? Answer:  There are a number of factors that determine the Maximum Operating Depth (MOD) of any gas mixture. These include: Inert-Gas Narcosis Inert gas narcosis using air begins to become debilitating through anaesthetic effect […]

Deep Diving Maladies – Compression Arthralgia by Andy Davis Compression Arthralgia (also called compression pains)  can onset as shallow as 60m/200ft but becomes more significant as depth/pressure increases.The severity of compression arthralgia is determined by the speed of descent (rate of compression), depth attained (significance of compression) and the level of diver exertion or activity. […]

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An abridged version of this deep stops article was originally in DeepTech, 5:64; and the full version subsequently published in Cave Diving Group Newsletter, 121:2-5. The Importance of Deep Stops: Rethinking Ascent Patterns From Decompression Dives by Richard L. Pyle Before I begin, let’s make something perfectly clear: I am a fish-nerd (i.e., an ichthyologist). […]

Deep Diver What You Really Need to Learn to Become a Safer, Capable Recreational Deep Diver by Andy Davis  Deep Diver training is offered by most scuba training agencies and typically qualifies the diver to progress to deeper depths, up to the recreational maximum depth of 40m/130ft.  The purpose of this article is to examine […]