How does nitrox affect a diver's bottom time?

Using nitrox, which has a higher oxygen content than regular air, extends allowable bottom time for divers. This is primarily due to the reduced nitrogen content in nitrox blends. Since nitrogen is the gas that limits no-decompression time due to its tendency to dissolve and accumulate in body tissues as divers descend, using a nitrox mix effectively lowers the nitrogen absorption rate during a dive. Consequently, divers can spend longer at a specific depth compared to using air without increasing their risk of nitrogen narcosis or decompression sickness.

It's important for divers to plan their dives based on the specific blend of nitrox they are using, as different oxygen percentages can influence their maximum depth and bottom time limits. Additionally, while nitrox does not necessarily reduce the need for safety stops, it still requires careful monitoring of exposure to oxygen to avoid toxicity at depth.