What is the maximum ascent rate recommended for divers?

The recommended maximum ascent rate for divers is generally considered to be 30 feet (10 meters) per minute. This guideline is designed to help minimize the risk of decompression sickness, which can occur when divers ascend too quickly, causing nitrogen bubbles to form in the bloodstream and tissues.

Ascending at this rate allows divers to safely off-gas nitrogen that has been absorbed while they were under pressure. It also gives time for the body to adjust to the decreasing pressure, thereby reducing the likelihood of experiencing barotrauma or other pressure-related injuries.

By adhering to this ascent rate, divers can maintain safety during their dive profiles and promote a more controlled ascent that aligns with recommended dive safety practices. Other ascent rates, such as 20 feet or 40 feet per minute, do not adequately balance the risks associated with rapid ascents and are not aligned with standard safety recommendations in recreational diving.