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.

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.

Two divers follow a divemaster beyond the level of their training. Only one comes back.

Adhering to predive procedures is crucial when using a closed-circuit rebreather. Without a buddy to catch his mistake, one diver pays the ultimate price for carelessness.

An out-of-air situation takes a turn for the worse when buddy-breathing divers make a crucial error in judgment.

One family's first post-checkout dive takes a tragic turn.

Today, there are hundreds of careers in diving. A recreational dive leader instructs and supervises recreational divers.