What is the minimum recommended surface interval for Nitrox diving?

The minimum recommended surface interval for Nitrox diving is generally considered to be 30 minutes. This duration allows sufficient time for nitrogen absorption and off-gassing, which is critical for reducing the risk of decompression sickness. After a dive, especially with enriched air that has a higher percentage of oxygen, a surface interval of at least 30 minutes helps ensure that divers can safely make additional dives without accumulating excess nitrogen in their bodies.

This practice is rooted in dive planning and safety protocols that emphasize the importance of allowing time for the body to eliminate nitrogen, regardless of the gas mixture used. While the specific surface interval can vary based on several factors such as previous dive profiles, depth, and dive duration, 30 minutes serves as a standard guideline that contributes to diver safety.