What purpose does a surface interval serve between Nitrox dives?

The surface interval between Nitrox dives plays a crucial role in managing nitrogen levels within the body. During a dive, divers absorb nitrogen, which is a natural consequence of breathing compressed air or a Nitrox mixture. This nitrogen can potentially lead to decompression sickness (DCS) if a diver ascends too quickly or does not allow sufficient time for the body to eliminate the absorbed nitrogen.

The primary purpose of the surface interval is to provide the body with adequate time to metabolize and off-gas the nitrogen absorbed during the dive. This reduction in the amount of nitrogen in the body helps mitigate the risks associated with DCS, making the subsequent dive safer.

While enjoying time on the boat, recharging equipment, and evaluating dive conditions are aspects of the overall diving experience, they do not specifically address the physiological need to manage nitrogen levels that the surface interval is designed for. Hence, the surface interval is essential for safety and plays a significant role in dive planning.