What are the advantages for diving Nitrox?

• A. Reduced decompression time
• B. Reduced residual nitrogen in the body after a dive
• C. Extended bottom times for no-decompression diving
• D. Reduced Nitrogen Narcosis

Answer: (C)

Nitrox raises the oxygen fraction in the breathing gas and lowers the nitrogen fraction. Because less nitrogen is available to dissolve into your tissues, nitrogen builds up more slowly during a dive. That slower buildup means you reach the no-decompression limit later, so you can stay at depth longer without needing decompression stops. This extended bottom time for no-decompression diving is the primary advantage of using Nitrox.

It's true that Nitrox can influence narcotic effects and that you must manage the partial pressure of oxygen to avoid toxicity, which limits how deep you can go and which mixes you choose. The other statements aren’t the primary, consistent benefit for recreational dives: while there are nuances about residual nitrogen and narcosis, the standout advantage most divers experience is longer bottom times without decompression.