Which safety procedure is essential during ascent to avoid decompression sickness?

Executing a controlled ascent rate is crucial during ascent to reduce the risk of decompression sickness, also known as "the bends." When divers ascend too quickly, nitrogen that has been absorbed into their tissues under pressure can come out of solution too rapidly, forming bubbles. These bubbles can lead to various symptoms and complications that can severely affect health.

A controlled ascent allows for the gradual release of nitrogen from the body, giving time for the gas to be safely eliminated through the lungs. This procedure is supported by diving science and is generally advised to include safety stops at specific depths, which further helps in accumulating a margin of safety during ascent. Following recommended ascent rates is a key practice in safe diving, effectively minimizing the likelihood of diving-related injuries.