Which information must a Nitrox cylinder's contents tag clearly display?

The contents tag on a Nitrox cylinder must clearly display the FO2 content, which indicates the percentage of oxygen in the gas mixture. This is crucial for divers to know, as it directly affects their dive plan, including the maximum operating depth (MOD) for that specific gas mixture. The MOD is the maximum depth at which a diver can safely breathe the gas mix without risking oxygen toxicity. Additionally, the tag should indicate who performed the analysis, ensuring accountability and safety, as it shows that the gas mix has been verified before use. Including the date of the analysis helps in managing the currency of that information, as gas mixtures can degrade or change over time if not properly managed.

This combination of information is essential for safe diving with enriched air nitrox, allowing divers to make informed decisions about their dive plans. It empowers divers to avoid risks associated with improper gas mixtures and ensures compliance with safety standards in diving practices.