What is the importance of using markings on tanks containing EANx?

The use of markings on tanks containing Enriched Air Nitrox (EANx) is crucial for preventing accidental misuse. These markings typically provide essential information about the contents of the tank, such as the oxygen percentage, which can vary from standard air. Proper labeling serves as a clear visual reminder for divers, helping to ensure that they do not inadvertently use gas mixtures that are unsuitable for their planned dive. This is particularly important in maintaining safety, as using the wrong gas can lead to serious diving incidents, including oxygen toxicity. Markings are therefore a critical safety feature that helps to avoid confusion and promotes the safe handling of EANx tanks.