What is a primary characteristic of Nitrox that divers need to consider?

A primary characteristic of Nitrox that divers need to consider is that it has a reduced nitrogen content, affecting absorption rates. The standard composition of air is approximately 78% nitrogen and 21% oxygen, while Enriched Air Nitrox, commonly known as Nitrox, typically has a higher concentration of oxygen and a corresponding lower concentration of nitrogen. This reduced nitrogen level decreases the amount of nitrogen a diver absorbs during a dive, which can lead to a lower risk of decompression sickness, especially on repetitive dives or longer bottom times. Understanding this aspect is crucial for divers to properly plan their dives and manage their exposure to nitrogen while enjoying the benefits of extended no-decompression limits and increased safety margins.

Other options suggest inaccuracies about Nitrox, such as claiming it contains higher nitrogen content or that it is safe for unlimited depth diving, which are critical considerations divers must be aware of regarding the limitations and proper usage of different gas mixes.