mixed gas diving

Hydrogen in the Mix

In the early part of the 20th century, American physicist and chemist, Professor Elihu Thomson – the person credited with putting the eventual use of helium on the diving menu – had originally proposed the use of hydrogen as a… Read More ›

The Search for X5

Developed by the Royal Navy during WWII, the X-craft were midget submarines manned by a crew of four – one of whom was the designated diver.  Because of their limited range, the smaller X-Craft would be towed by a ‘mother’… Read More ›

The Fundamentals Of Better Diving

Hopefully everybody who dives has—at some point in their training—pored over the pages of a “How To” manual in an attempt to better understand the underlying physics and physiology governing their safe enjoyment of diving, and the techniques that, when… Read More ›

The Pearl Diver*

“Kanzo Makame, the diver, sturdy and small Japanee, Seeker of pearls and of pearl-shell down in the depths of the sea, Trudged o’er the bed of the ocean, searching industriously. Over the pearl-grounds the lugger drifted — a little white… Read More ›

‘Under Pressure’

Encouraged by the comments of a former U.S. President, Theodore Roosevelt, who wrote that,   “Nothing in the world is worth having or worth doing unless it means effort, pain, difficulty…”, I have no hesitation in stating that Gareth Lock’s book,… Read More ›

Safety At Depth

Regardless of depth, there’s no such thing as an ‘easy’ dive:  once a diver recognises that fact then many of the so-called ‘accidents’ that sometimes occur in deeper technical diving become avoidable.  Rather than being, ‘events without apparent cause’, incidents… Read More ›