A Free-Flowing Failure
Contrary to what you might expect, air will escape from a low-pressure hose faster than from a high-pressure hose because of the low-pressure hose’s wider opening.
THE OFFICIAL MAGAZINE OF DIVERS ALERT NETWORK
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An Emergency Ascent Just in Time
Dive safety experts now advise divers to always dive with their tank valves completely open — not turned back a half or quarter turn. Are you up to date on the rules? Read one diver’s story.
Carbon Monoxide: The Silent Killer
Carbon monoxide (CO), an odorless, tasteless and invisible toxic gas that could find its way into your scuba cylinder, has caused the deaths of divers all around the world.
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Breathing Gases
Some divers like closed-circuit rebreathers for their ability to provide breathing gas at a set partial pressure of oxygen throughout dives.
Shooter: Burt Jones
Burt Jones changed the landscape at a piece of Indonesian underwater paradise called Coral Triangle. Read his story.
Blackwater Diving
Divers can capture some breathtaking images when diving at night, but it can be a scary experience. Gain some great tips on nighttime underwater photography.
Your Lungs and Diving
How does diving affect lung function? While all divers will likely have increased CO2 levels (to some degree) during a dive, the manifestations are minor.
A Salute to St. Eustatius
The St. Eustatius National Marine Park has a growing and proliferating reef. The island itself also has a rich past.
Dominica Topside
Dominica is home to great dive destinations, but topside, there are plenty of excursions, too.
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