What is the primary reason for completing a safety stop during ascent?

Completing a safety stop during ascent primarily serves the purpose of allowing for the safe off-gassing of nitrogen. As divers breathe compressed air at depth, nitrogen builds up in their bodies due to increased pressure. When ascending, the pressure decreases, and this can lead to nitrogen forming bubbles in the bloodstream if it is not released gradually.

The safety stop, typically performed at a depth of about 15 to 20 feet (approximately 5 to 6 meters) for a few minutes, gives the body extra time to eliminate the accumulated nitrogen. This controlled ascent helps to reduce the risk of decompression sickness, often referred to as "the bends." While enjoying the view or ensuring air tanks are emptied are secondary benefits, they do not encompass the main reason for the safety stop, which is fundamentally about safeguarding the diver’s health by facilitating a safe transition in pressure and minimizing the risk of nitrogen-related injuries.