Which of the following statements about Nitrox is true?

Nitrox is indeed characterized by having a higher oxygen content than regular air, which is composed of approximately 21% oxygen and 79% nitrogen. Nitrox typically refers to blends where the oxygen percentage is greater than that of air, commonly 32% or 36% oxygen, with the remainder made up of nitrogen. This higher oxygen content allows divers to benefit from extended bottom times and reduced nitrogen absorption, as the increased oxygen can help mitigate some of the risks associated with nitrogen narcosis and decompression sickness.

The other statements do not accurately reflect the characteristics or suitable use of Nitrox. For instance, while using Nitrox can reduce the chances of decompression sickness, it does not completely eliminate the risk, especially if the dive profiles and ascent procedures aren't followed correctly. Additionally, Nitrox is not limited to shallow depths; it can be used at various depths depending on the specific oxygen content of the gas and the maximum operating depth to avoid oxygen toxicity. Furthermore, Nitrox is widely utilized in recreational diving, not excluded from it.