What is the maximum ascent rate recommended when performing a rescue from a depth?

The recommended maximum ascent rate of 18 meters per minute is grounded in safety practices that aim to minimize the risk of decompression sickness. Ascending too quickly can lead to rapid changes in pressure that may cause nitrogen bubbles to form in the body, which can result in various health complications.

The standard practice among diving organizations emphasizes controlling the ascent rate to allow the body sufficient time to safely eliminate nitrogen absorbed during the dive. By adhering to an 18 meters per minute ascent rate, divers ensure a balance between efficiency in rescue operations and the necessary precautions to protect the diver’s health.

In contrast, ascent rates higher than this recommendation, such as 20 meters or 30 meters per minute, greatly increase the risk of decompression sickness because the body does not have adequate time to off-gas nitrogen safely. Thus, the 18 meters per minute ascent rate is recognized as a safe and effective standard for rescue scenarios.