You may cough or choke if you accidentally inhale a small amount of water. You can minimize this risk by remembering to clear your regulator or snorkel before taking a first breath, and breathing slowly and carefully.

It's important not to ascend to the surface when you have any restriction in your airway. Doing so can prevent air from escaping your lungs and cause lung overexpansion injuries.

If you accidentally choke on water, remain calm and cough through your regulator. The water will eventually clear from your airway, and you'll be able to continue your dive.