What is the recommended ascent rate for divers?

The recommended ascent rate for divers is no faster than 18 meters per minute. This guideline is established to minimize the risk of decompression sickness, commonly known as "the bends." When a diver ascends too quickly, the reduced pressure can cause nitrogen, which the body absorbs while underwater, to form bubbles in the bloodstream and tissues. These bubbles can lead to serious health issues or potentially fatal conditions.

The ascent rate of 18 meters per minute strikes a balance between safety and efficiency during ascent. It allows for a controlled rise that can help in avoiding rapid pressure changes that may adversely affect the body. In addition, divers are often advised to make safety stops during their ascent, specifically at depths of 3 to 5 meters, to further reduce the risk of decompression sickness.

This ascent rate helps ensure that divers can safely return to the surface, while also following best practices in diving safety protocols. Lower ascent rates, such as 10 or 5 meters per minute, may be recommended in certain circumstances or for specific types of dives, but 18 meters per minute is generally accepted as the standard maximum rate for a safe ascent under normal conditions.