What is the recommended safe ascent rate for recreational divers?

The recommended safe ascent rate for recreational divers is 30 feet per minute. This rate is established to minimize the risk of decompression sickness, which can occur if a diver ascends too quickly from depths where the pressure is higher.

Ascending at a controlled rate allows the body to adjust to the changing pressure, enabling excess nitrogen that has accumulated in the body's tissues during the dive to be expelled safely through exhalation. This slow ascent is especially crucial during the last portion of the dive, typically the last 15 feet, where divers are often encouraged to transition to an even slower ascent or complete a safety stop.

A slower ascent rate is more effective in preventing bubble formation in the bloodstream, which can lead to serious health risks. Therefore, while there are faster ascent rates mentioned in other contexts, for recreational diving, adhering to the 30 feet per minute guideline is crucial for safety.