What is the maximum ascent rate recommended for a diver?

The maximum ascent rate recommended for a diver is 30 feet per minute (fsw/min). This rate is advised to minimize the risks associated with decompression sickness, which can occur when a diver ascends too rapidly. As divers decrease their depth, nitrogen that has been absorbed into their tissues begins to off-gas. If they ascend too quickly, bubbles can form in their bloodstream or tissues, leading to potentially life-threatening injuries.

Maintaining the ascent rate at 30 fsw/min allows for sufficient time for the body to safely eliminate excess nitrogen without overwhelming the system. This standard is based on extensive research and data, which indicates that adhering to this rate significantly reduces the likelihood of decompression illness among divers.

Understanding the importance of controlled ascent rates is crucial for maintaining diver safety and well-being, making it a fundamental aspect of diving training and procedures.