“Change is inevitable. Change is constant.” Benjamin Disraeli — 19th Century British Statesman There’s a vintage TV comedy sketch by Monty Python...

So how can we improve diving safety? Gareth Lock is a man on a mission. The 46-year old British technical diver, and retired Royal Air Force senio...

Exposure to excessive oxygen can impair distance vision. This phenomenon, called hyperoxic myopia, is a form of oxygen toxicity that affects the ...

Socrates is widely regarded as one of the individuals that shaped the world. It is believed by some that its history would be profoundly different...

How long a CO2 scrubber lasts during a dive depends on many factors. I will mention some of the ways that CO2 can be removed from the breathing gas. I will also discuss ways to measure how long a scrubber will last (called the endurance time) and some of the factors that change it, but first will discuss why it is necessary at all.

Just over 45 years ago, in 1970, researchers at the University of Pennsylvania used the best information available at the time to derive a model fo...

Learn about the signs and symptoms of central nervous system (CNS) oxygen toxicity and the likelihood of oxygen seizures.

Launched in June 1983, Orca Industries Inc.’s Electronic Dive Guide (EDGE)—the first true microprocessor-based dive computer1 introduced the concept of multi-level diving, and in doing so helped revolutionize sport diving.

Reviewed in 2025. Digital communications are clearly replacing analog communications in computer based devices. As more digital communication becom...