How does the use of Nitrox affect the planning of dive profiles?

The use of Nitrox significantly enhances the planning of dive profiles, primarily because it allows for longer bottom times at certain depths while reducing the risk of nitrogen narcosis and decompression sickness. Nitrox contains a higher percentage of oxygen and a lower percentage of nitrogen compared to air. This change in gas composition means that divers can safely extend their dive time on a single dive without exceeding safe nitrogen limits, which is particularly beneficial during planned dives on a specific profile.

When dives are planned using Nitrox, divers can utilize tables or dive computers specifically designed for Nitrox, which calculate and indicate safe maximum depths and bottom times based on the gas mixture being used. This leads to more flexible and extended diving options, allowing divers to make the most of their underwater experience. Therefore, longer durations can be safely planned with an associated reduction in risk when compared to using standard air.

The other options suggest misconceptions about the role and significance of dive planning with Nitrox, which is why they do not apply in this context.