Why is it important to analyze gas mixtures before a Nitrox dive?

Analyzing gas mixtures before a Nitrox dive is crucial for preventing oxygen toxicity and ensuring diver safety. The composition of Nitrox, which contains a higher percentage of oxygen compared to regular air, alters the depth at which a diver can safely operate without complications. As the partial pressure of oxygen increases with depth, it is essential to know the exact mix to avoid reaching levels that could lead to oxygen toxicity, which can cause symptoms ranging from visual disturbances to seizures.

By performing a thorough analysis of the gas mixture prior to a dive, divers can confirm that the oxygen content is within safe limits for their planned maximum depth. This pre-dive safety check is vital for planning and managing the risks associated with Nitrox diving, making it a key component of safe diving practices.