Which of the following is a characteristic of Nitrox compared to air?

The characteristic of Nitrox that makes it distinct from air is related to its composition of gases, particularly its oxygen content. Nitrox is a blend of nitrogen and oxygen that contains a higher percentage of oxygen than normal air, which consists of approximately 21% oxygen and 79% nitrogen.

When diving with Nitrox, the increased partial pressure of oxygen can indeed lead to an elevated risk of oxygen toxicity, especially when divers use mixes that contain higher oxygen concentrations. Oxygen toxicity becomes a concern at higher pressures, typically encountered during deeper dives or prolonged exposures. As such, divers using Nitrox must be educated about the potential risks associated with oxygen toxicity and should adhere to specific depth limits depending on their chosen Nitrox blend.

In contrast, air has a balanced nitrogen and oxygen ratio that does not pose the same risk, making the awareness of oxygen toxicity essential for divers utilizing Nitrox in their diving practices. Understanding these risks ensures safe diving procedures and helps divers make informed choices regarding their gas mixes.