In addition to oxygen, what is the other main gas in Nitrox?

The other main gas in Nitrox, in addition to oxygen, is nitrogen. Nitrox is a mixture that typically consists of a higher percentage of oxygen and a reduced percentage of nitrogen compared to regular air. This mixture is engineered to reduce the amount of nitrogen a diver absorbs, which can help decrease the risk of decompression sickness during dives. By understanding the composition of Nitrox, divers can better plan their dives and manage their exposure to nitrogen, therefore maximizing their safety and efficiency in underwater activities.

The presence of nitrogen in Nitrox is crucial to its application, as any other gases like helium or hydrogen do not form the standard Nitrox mixture, while carbon dioxide is a byproduct of respiration and not a component of the gas mixtures used for diving.