What is the difference in decompression obligations between Air and Nitrox dives?

The correct answer highlights a fundamental principle of diving with different gas mixtures. When divers use Nitrox, which contains a higher percentage of oxygen and a lower percentage of nitrogen compared to air, it typically results in reduced nitrogen absorption during the dive. This means that for a given depth and time, Nitrox allows divers to stay longer on the bottom before having to ascend, as there is less nitrogen in the body that would necessitate decompression stops.

Using Nitrox can therefore extend bottom times, enabling divers to explore more extensively while maintaining safety. It’s important for divers to be aware of the specific mix of Nitrox being used, as different ratios of oxygen to nitrogen can significantly affect decompression obligations. This understanding is crucial for planning dives and minimizing the risk of decompression sickness.

The other options do not accurately capture the relationship between gas mixtures and decompression requirements. Generally, air dives do not always impose deeper decompression stops, and while Nitrox does allow for extended bottom times, it does not imply that they can be conducted without any decompression stops; rather, it modifies the context of when and how those stops should take place. Additionally, the assertion that there is no difference in decompression obligations is incorrect, as the specific gas mixture used