What is the preferred surface interval for Nitrox diving?

The preferred surface interval for Nitrox diving should take into account the type of Nitrox being used, the depth of the dives, and the specific dive profile. While there is flexibility based on these factors, a 60-minute surface interval is often recommended as it allows sufficient time for nitrogen washout, especially after deeper or more repetitive dives.

During this interval, the body off-gasses the nitrogen that was absorbed during the dive, reducing the risk of decompression sickness. This duration strikes a balance; it's lengthy enough to facilitate effective decompression while still being practical for divers who may want to maximize their dive potential with subsequent dives. Longer surface intervals can provide even more security but may not always be feasible or necessary.

Ultimately, the 60-minute interval is a safety guideline that helps divers prepare for future dives while taking into consideration the physiological impacts of nitrogen absorption and elimination in the body. Additionally, radar silence and effective dive planning usually incorporate such intervals to ensure safe diving practices.