Our technical editor confronts myths about rebreathers and argues that semi-closed systems make sense for recreational divers.

Does your tank have enough air for your next dive? Find out.

Wreck diving skills Houdini would love.

Decompression diving can take you to greater depths, and your skills to a whole new level. Are you ready to push the limits?

Because at 100 feet, most divers get narced.

Plus, a bone and joint quiz and results from our online poll.

How long will a tank last you at a given depth? Here's how to find out.

Will "Solo Diver" be the new C-card you flash on your next dive trip?

If something went wrong on your next dive, would you be the hero or the helpless bystander?