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.

An unconscious diver floats near coral

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 big saltwater fish tank stands proudly in a living room.

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.

Contrary to what you might expect, air will escape from a low-pressure hose (left) faster than from a high-pressure hose (right) 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.

In a black-and-white image, Jim Bunch inspects a shipwreck

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.