Oops! It appears that you have disabled your Javascript. In order for you to see this page as it is meant to appear, we ask that you please re-enable your Javascript!

Tag Archive: depth


gradient-factors-use-settings-decompression

The Physics of Diving – Scuba Gas Laws A concise explanation of the critical scuba gas laws for divers by Andy Davis Scuba diving is all about getting gas into your body while you are underwater. What complicates scuba diving is the way gasses behaves at depth, under pressure, in your body and in your […]

scuba-tips-advice-how-to-professional

Scuba Q and A Question:   I was taught that “recreational divers plan all dives to be no stop dives” and also that most agencies consider 40m /130 feet as the maximum depth for recreational deep diving.  That seems inconsistent when my dive computer allows me to dive below 40m/130 feet and still stay inside no-stop limits. […]

gradient-factors-use-settings-decompression

A Logical Application of Gradient Factors Settings for Open-Circuit Tech Divers by Andy Davis As an active technical diving instructor for many years, I see many tech divers struggling to use Gradient Factors to their full advantage. This article explains my own systematic and easily applicable approach to setting Gradient Factors for optimal off-gassing effect. […]

scuba-tips-advice-how-to-professional

Scuba Q and A: Why Do Deep Divers Use Helium? Q. Why is helium preferred over nitrogen for diluting oxygen during deep sea diving? Answer: There are three reasons why helium becomes a necessary addition to breathing gas as depth increases: Oxygen Toxicity Oxygen is known to cause central nervous system (CNS) toxicity at higher […]

scuba-tips-advice-how-to-professional

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 […]

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 […]