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.
Alert Diver Issue: Q2 2017
Mouths Full of Eggs
Eggs are a dinnertime delicacy in reefs around the world, which means protecting nests is hard work. Ironically, the safest place to hide eggs may be in the mouth.
Diving After Arthroscopic Knee Surgery
DAN medics and researchers answer your questions about dive medicine.
Oxygen Sensing in Rebreather Diving
Reliable measurement of oxygen is the technology that makes mixed-gas closed-circuit rebreathers (CCRs) possible. The first digital solid-state CCR sensor was made available in Spring 2017, and has greater accuracy and reliability.
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.
Member to Member: A Reef in the Living Room
Aquariums can house your own slice of indoor reef life — complete with colorful fish, corals and spunky crabs. Follow these tips to create your perfect aquarium.
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.
DAN Member Profile: Jim W. Bunch
DAN member, diver and author Jim W. Bunch talks about discovering and exploring underwaters wrecks on the shores of North Carolina.
Under Pressure: A Lifetime of Hyperbaric Research
Lindell Weaver, M.D., has spent his career treating critically ill patients and conducting research on carbon-monoxide (CO) poisoning and brain injuries.
High on Mercury
Grouper populations are on the rebound thanks to protection efforts. But a major threat to these fish remains: mercury.
