If experiencing an emergency ascent, what should a diver prioritize?

In the situation of an emergency ascent, maintaining a slow ascent rate is crucial for the diver's safety. When ascending underwater, the reduction in pressure as a diver rises can cause nitrogen bubbles to form in the bloodstream and tissues, which can lead to decompression sickness, commonly known as "the bends." By prioritizing a slow ascent, the diver allows for proper off-gassing of nitrogen, reducing the risk of these bubbles forming and therefore decreasing the likelihood of serious injury.

Though other actions may also be important during an emergency ascent—such as signaling for help, managing air supply, or monitoring the air gauge—none are as critical as controlling the ascent rate. Rapid ascents can have life-threatening consequences, making the preservation of a safe ascent speed the top priority for a diver in distress.