What is the best practice when performing an uncontrolled ascent?

When performing an uncontrolled ascent, exhaling steadily while ascending is crucial because it helps prevent lung overexpansion and potential barotrauma that can occur due to rapid pressure changes. As a diver ascends, the pressure decreases, which allows any air in the lungs to expand. If a diver holds their breath during this ascent, the expanding air can create significant risks, such as rupturing the lungs. By exhaling steadily, divers release air from their lungs, reducing the risk of serious injury.

Exhaling also aids in managing buoyancy and maintaining a more controlled ascent, even in uncontrolled situations. While it may seem counterintuitive, allowing air to escape helps the diver stay safer and more balanced as they rise towards the surface. This practice is emphasized in diver safety protocols to reduce potential complications associated with rapid ascents.