Oxygen percentages on the OCEANx calculator can be set within which range?

The range of oxygen percentages that can be set on the OCEANx calculator, which is used for planning nitrox dives, is 25% to 40%. This range is significant because it encompasses the common mixtures of nitrox used by divers, typically between 32% and 36%, while still allowing for a broader selection of oxygen levels that divers might choose for specific dive conditions and personal safety considerations.

Understanding the importance of this range is crucial. Mixtures outside this range could lead to changes in the partial pressure of oxygen and might not provide the intended benefits for reducing nitrogen narcosis or extending bottom time without increasing the risks of oxygen toxicity. This ability to select values within this specified range ensures that divers can effectively utilize nitrox while adhering to safe diving practices.