After experiencing difficulty breathing underwater, a diver's knowledge of immersion pulmonary edema—from a previous episode—proved beneficial when seeking treatment.

Divers should only share air in emergencies. One pair learned this lesson the hard way when they made the mistake of planning their entire dives on shared air—and running out.

An inexperienced diver on a surface-supplied air dive let distractions interfere with safety precautions, leading to chest pains later that day. Here's what happened—and how to treat it.

What happens when you experience rapidly progressing symptoms and you're on a liveaboard? Here's how a quick-reacting crew helped one diver seek treatment.

Not every dive can be in pristine conditions, but there are limits, and you have to know when to say no—especially amid a weather advisory.

As important as it is to know your own dive equipment, you must familiarize yourself with your buddy's too—here's why.