When is it appropriate to use a controlled ascent?

A controlled ascent is particularly important when recovering a diver in distress because it allows the rescuer to manage both their own safety and the safety of the distressed diver. When a diver is in trouble, there is a need to stabilize the situation and ensure that both divers ascend in a manner that minimizes the risk of complications such as barotrauma or decompression sickness. A controlled ascent involves a slow rise to the surface, typically at a rate no faster than 30 feet (10 meters) per minute, which helps to prevent nitrogen bubbles from forming in the body tissues, a common concern when dealing with distressed situations.

This method also allows the rescuer to maintain proximity to the distressed diver, provide assistance as needed during the ascent, and monitor the diver's condition closely. Overall, a controlled ascent in this context is a vital practice that emphasizes the importance of safety and effective emergency response.