What benefit does Nitrox provide in terms of dive time?

Nitrox, a breathing gas mixture of nitrogen and oxygen, is beneficial for divers primarily because it increases the maximum allowable bottom time. This advantage stems from the reduced percentage of nitrogen in Nitrox compared to air, which has a higher nitrogen content. When divers use Nitrox, they absorb less nitrogen during their dives. This lower nitrogen absorption allows for longer no-decompression limits and, consequently, an extended duration underwater without exceeding safe nitrogen limits.

This increase in bottom time is vital for divers seeking to explore deeper or to spend more time at their chosen depth while adhering to safe diving practices. It is essential to note that while divers using Nitrox can enjoy longer dives, they must also be aware of the specific oxygen toxicity limits associated with increased oxygen concentrations at higher pressures.

In contrast, the other choices do not accurately reflect the benefits of using Nitrox. The use of Nitrox does not inherently allow for longer ascent times, change dive depth, or eliminate the need for dive computers. Rather, it complements dive planning by enabling longer bottom times, but careful ascent rates and planning with dive computers remain crucial for safety.