What essential information must a nitrox cylinder label contain?

The essential information that must be included on a nitrox cylinder label is the FO2 content, MOD (Maximum Operating Depth), and analysis details. This is crucial for ensuring the safe use of the enriched air nitrox.

The FO2 content specifies the percentage of oxygen in the gas mixture, which is critical for divers to understand the risks of oxygen toxicity at various depths. Each nitrox mix has a corresponding MOD, which indicates the deepest depth at which that specific nitrox mixture can be safely used without exceeding acceptable partial pressures of oxygen. Analysis details are important for confirming that the actual gas mixture conforms to the intended specifications, allowing divers to make informed decisions based on accurate and verified information.

Without this comprehensive information on the label, divers could inadvertently expose themselves to dangerous conditions, such as exceeding the MOD or experiencing an oxygen toxicity incident due to incorrect gas composition. Therefore, this option encompasses all the critical components required for safe diving practices with nitrox mixes.