What type of ascent protocol should divers follow after a Nitrox dive?

Following a Nitrox dive, it is crucial for divers to adhere to a slow and controlled ascent that includes safety stop protocols. This practice is vital for several reasons.

Divers using Nitrox, which contains a higher percentage of oxygen than air, still absorb nitrogen during their dive, and proper ascent rates help to minimize the risk of decompression sickness (DCS). A slow ascent allows nitrogen to be released safely from the body, as it prevents the formation of nitrogen bubbles that can occur if the ascent is too rapid. During the ascent, divers typically engage in a safety stop—commonly at 3 to 5 meters (10 to 15 feet) for 3 to 5 minutes—which further mitigates the risk of DCS by allowing more time for nitrogen to escape from tissue without causing harmful bubbles.

Opting for a rapid ascent, ascending without any stops, or maximizing speed during ascent disregards safety protocols that are essential for preventing DCS. These practices fail to ensure that nitrogen is adequately offgassed and can lead to reduced safety and increased risk of injury after the dive. Therefore, the recommended ascent protocol for divers after using Nitrox is to make a slow and controlled ascent while implementing safety stop practices.