Dive Theory - Andy Davis Sidemount Technical Wreck Diving Blog

Nitrogen Narcosis: Why It Is Hard to Know You Are Narked

How do scuba divers perceive nitrogen narcosis? Is it possible to gauge your susceptibility to narcosis & make sound judgments to manage it?

Why Do Divers Use Helium?

Find out the three reasons why divers use helium in their breathing gas to increase diving safety. Scuba agencies have differing policies on training for helium diving.

Does Nitrogen Narcosis Impairment Persist?

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A new study on nitrogen narcosis challenges the long held presumption that nitrogen narcosis impairment dissipates immediately on ascent from depth.

Nitrogen Narcosis Sedation & Consciousness

Nitrogen Narcosis Sedation and Consciousness

Nitrogen narcosis sedation is diminished consciousness: not the alcohol-like intoxication many divers are taught.

What Are The Three Benefits Of Nitrox When Scuba Diving?

The three benefits of nitrox as a breathing gas for scuba diving. Is it worth the cost of training and more expensive cylinder fills?

The Physics of Diving – Scuba Gas Laws Theory

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An explanation of the Scuba Gas Laws for Diving. Boyle's Law, Henry's Law, Charles Law, Dalton's Law, Oxygen Toxicity & Partial Pressures.

CO2 Narcosis and Hypercapnia When Scuba Diving

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Did you know that mild CO2 retention (hypercapnia) causes acute CO2 narcosis symptoms when you are diving? Don't assume it is nitrogen!

A Simple Guide To Dive Computer Algorithms

Not all dive computer algorithms are created equal. Learn the differences and make an informed decision when buying your next dive computer.

Why Do I Feel Tired After Diving? How To Avoid Post-Dive Fatigue

Do you feel tired after diving? Read this article to understand what REALLY causes post-dive fatigue & the simple steps needed to avoid it!

Technical Diving: Redundant Computers vs Backup Timer & Tables

Discover the pros & cons of redundant computers versus backup bottom timers & tables in technical diving. Which option is best for you?

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