Nature’s Best and Fastest Camouflage
Do you know which marine animal can camouflage the fastest and most effectively? (It can change in one fifth of a second!) Hint: It has eight long tentacles.
THE OFFICIAL MAGAZINE OF DIVERS ALERT NETWORK
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Clipperton: A Plastic Paradise
A little dot in the Pacific, Clipperton is surrounded by coral reefs and encloses a stagnant lagoon. Despite looking like paradise, Clipperton is being invaded by plastic.
Are 6351-T6 Alloy Scuba Cylinders Safe to Use?
After the rupturing of two alloy scuba cylinders, many wonder if they are safe to use? While cracking was documented in these cylinders, a major issue with their use is lack of consistent training and regulation in the testers, inspectors and fill-station operators.
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Dragon Road, Part 2
The handfish is a kind of evolutionary oddity that prefers to walk on its fins than swim. However, like so many other marine species, their species are in decline and their habitat is being stripped away.
So Others May Live
Can your training prepare you for absolute worst conditions? One writer took the challenge to find out what it was like being a rescue swimmer.
Member to Member: Sunscreen and Coral
Sunscreen pollution is a serious threat to the world’s coral reefs causing fast degradation. But, divers can combat the effects of this pollution with simple steps.
Diving with Dinosaurs
Considered critically endangered, smalltooth sawfish are under pressure from anglers who would take their rostrums as souvenirs and from the shark-fin trade. Many divers can go their whole lives without seeing one.
Saturation Diving
What is saturation diving? When the diver breathes in inert gas, it dissolves into the body’s tissues and reaches equilibrium with the ambient pressure at the diver’s depth.
Extreme Exposure
Richard Moon, M.D., has spent his career studying phenomena of great interest to scuba divers — including decompression sickness. Learn more about the researcher Richard Moon.
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