What should divers always do before making a dive with Nitrox?

Divers should always analyze the gas mixture and verify its oxygen content before making a dive with Nitrox because this step is critical for safety and proper dive planning. Nitrox contains a higher percentage of oxygen compared to regular air, which affects the limits of the dive, particularly regarding no-decompression limits and the potential for oxygen toxicity. By confirming the exact oxygen percentage, divers can calculate their maximum operating depth and adjust their dive plan accordingly, minimizing risks associated with breathing higher concentrations of oxygen.

While checking buoyancy control devices, ensuring gear is current, and reviewing dive plans with a buddy are all essential practices in diving, they do not directly address the specific considerations that come with using Nitrox. Analyzing the gas mixture is the fundamental first step unique to diving with enriched air, making it the most critical action prior to a Nitrox dive.