What is the maximum recommended ascent rate for divers?

The maximum recommended ascent rate for divers is typically set at 30 feet per minute. This rate is established to minimize the risks associated with decompression sickness, also known as "the bends," which can occur if divers ascend too rapidly. When a diver ascends, the pressure around them decreases, leading to a reduction in the amount of dissolved nitrogen in their body fluids. If the ascent is too fast, nitrogen can come out of solution too quickly, forming bubbles that can cause various health issues.

By adhering to the 30 feet per minute guideline, divers allow their bodies sufficient time to safely eliminate excess nitrogen and reduce the risk of developing decompression sickness. Additionally, many dive training agencies emphasize this ascent rate in training to ensure divers are well-prepared for safe diving practices. Understanding the physiological effects of pressure changes is essential for any diver, and this ascent rate is a critical component of safe ascent procedures.