What effect does using Nitrox have on a diver's bottom time at deeper depths?

Using Nitrox allows for increased bottom time at deeper depths due to its reduced nitrogen content compared to regular air. Nitrox, which is a mixture of nitrogen and oxygen, typically contains a higher percentage of oxygen and a lower percentage of nitrogen. Since nitrogen is the gas primarily responsible for the development of nitrogen narcosis and decompression sickness during dives, having less nitrogen in the mix means that divers can stay at greater depths for longer periods without exceeding safe nitrogen absorption limits.

This reduced nitrogen also helps in managing nitrogen loading during a dive, which can lead to longer no-decompression limits (NDLs). At deeper depths, where the pressure increases, the risk of nitrogen narcosis is greater, and using Nitrox can significantly mitigate this risk, thus allowing divers to have a safer diving experience with extended time underwater.

In summary, the correct answer reveals that Nitrox increases bottom time at depth, essential for divers who seek to maximize their exploration while maintaining safety.