Avoid tobacco and alcohol. Both tobacco smoke and alcohol irritate your mucus membranes, promoting more mucus that can block your eustachian tubes. Learn the ins and outs of the ear with our "11 Tips For Easy Equalizing".

More v. Bigger. In general, look for more batteries (six or eight) if you want a brighter light; look for bigger batteries (C or D cells) if you want longer burn time. You can find more light buying tips in Night Skills, our feature devoted to ...

If you have a tank, mount the regulator to it and turn on the air to pressurize. While hosing or soaking the regulator, press the purge button to wash inside the second stage. If you don't have a tank, be sure the regulator's dust cap ...

OK guys, for the last time — dive knives are tools, not weapons.

In the low visibility of a busy river channel, one diver loses his way and his life.

In a hurry to be the first person on the wreck, an experienced diver makes a rookie mistake that costs him his life.

Bill ran the numbers and decided he could break one of tech diving's cardinal rules of safety. The numbers didn't lie, but they also didn't account for an unplanned emergency.

A series of avoidable mistakes claims the lives of two divers.

A close call drills important safety lessons into the head of one lucky diver. Next time, he'll follow instructions. After reading his story, you will too.