What is the recommended maximum ascent rate for recreational dives?

The recommended maximum ascent rate for recreational dives is 30 feet (10 meters) per minute. This ascent rate is established to minimize the risk of decompression sickness, also known as "the bends," which can occur if divers ascend too quickly. As a diver ascends, the pressure around them decreases, causing nitrogen that has been absorbed into the body tissues during the dive to come out of solution. Ascending at a controlled rate allows the body to safely off-gas this nitrogen, reducing the likelihood of bubbles forming in the tissues and bloodstream.

By adhering to this ascent rate, divers can perform safety stops, which are typically recommended at 15 feet (5 meters) for a few minutes. These stops provide additional time for the body to eliminate nitrogen safely. Following the established maximum ascent rate contributes to a safer diving experience and promotes scuba diving as an enjoyable and low-risk sport.