Why is a safety stop recommended during ascent?

A safety stop during ascent is recommended primarily to release absorbed nitrogen from the body and reduce the risk of decompression sickness. When divers go underwater, their bodies absorb nitrogen from the breathing gas due to increased pressure. As they ascend, the pressure decreases, and if they ascend too quickly, the nitrogen can form bubbles in the bloodstream or tissues, leading to decompression sickness, commonly known as "the bends." A safety stop, typically performed around 3 to 5 meters (10 to 15 feet) for 3 to 5 minutes, allows nitrogen to be gradually released from the body, minimizing the risk of bubbles forming. This practice enhances safety and promotes healthier dive practices, especially after deeper or longer dives.

While it's true that resting is important, and buoyancy adjustments can be made during ascents, these reasons are secondary to the primary objective of reducing nitrogen absorption risks. Equipment checks are generally best performed at designated stops rather than focusing on the safety stop itself, which is specifically aimed at managing gas absorption.