Safety
Gas density: the limit you don't plan for
Most divers plan for oxygen and narcosis. Fewer plan for how thick their gas is at depth. Research published in 2016 suggests they should, especially on rebreathers.
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Tech Diving AU
Thoughts, stories and ideas.
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History
From Haldane to Bühlmann
The decompression model in your computer has a family tree going back more than a century. A short history of how we learned to come up.
History
Sheck Exley and the rules of cave diving
The most influential cave diver of his era set depth records, wrote the rules that still save lives, and died pursuing a 1,000-foot dive. A profile.
History
Helium: how a rare gas opened the deep
Nitrogen made deep diving on air dangerous and unpredictable. Helium changed that, first for navies and oil companies, then for technical divers.
History
The rebreather's long road
Rebreathers came before scuba. It took more than a century for them to become everyday kit for technical divers. A short history.