What is the recommended maximum ascent rate for divers?

The recommended maximum ascent rate for divers is important for safety, primarily to prevent decompression sickness, also known as "the bends." As divers ascend, they need to allow time for the inert gases absorbed during the dive to safely off-gas from their bodies. A slower ascent rate helps manage this process effectively.

An ascent rate of 18 meters per minute is recognized as safe and effective for recreational diving. It allows divers to minimize their risk of decompression sickness by providing a balance between a reasonable pace and safety. Following this rate gives the body adequate time to adjust as pressure decreases, particularly during deeper dives where nitrogen is more significantly absorbed.

While there are various ascent rates cited in different diving agencies, the specific figure of 18 meters per minute is widely adopted within many training programs, illustrating its acceptance among the diving community.