What precaution should be taken when transitioning from Nitrox to air diving?

Allowing adequate surface time after diving with Nitrox is essential to safely transition to air diving. This precaution is based on the need to eliminate residual nitrogen from your body that may accumulate due to the effects of the Nitrox mixture you previously used. Nitrox, which has a higher concentration of oxygen than standard air, allows divers to experience longer bottom times but also requires careful consideration when switching back to air.

By allowing sufficient surface time, divers can ensure their nitrogen levels return to a safe state before their next dive. This is crucial because transitioning too quickly without proper surface intervals could lead to an increased risk of decompression sickness. Therefore, following the appropriate surface time not only enhances safety but also adheres to the principles of safe diving practices, especially when managing nitrogen absorption and elimination from the body.

This practice is particularly important for minimizing the risk associated with residual nitrogen, unlike the other options that suggest increasing dive times or deepening the dive profile, which could further elevate risks related to nitrogen loading.