During a controlled ascent, what is the maximum ascent rate to prevent injuries?

The maximum ascent rate to prevent injuries, particularly decompression sickness, is crucial for safe diving practices. An ascent rate of 9-18 meters per minute is generally accepted among training organizations as a safe range for controlled ascents. Ascending too quickly can lead to nitrogen bubbles forming in the body due to rapid changes in pressure, increasing the risk for decompression sickness.

Maintaining an ascent rate within this range allows divers to safely release dissolved nitrogen from their bodies as they return to the surface. It also provides time to monitor any potential symptoms of decompression issues and allows for safety stops if necessary, further enhancing the safety of the ascent process. While some organizations may recommend a more conservative ascent rate, such as 5 or 6 meters per minute, the established 9-18 meters per minute range is widely recognized as a standard that balances efficiency and safety in typical scenarios.