What error is commonly made when switching from Nitrox back to air?

Forgetting to analyze the new mix when switching from Nitrox back to air is a significant error because it can result in unintended exposure to nitrogen. When divers use Nitrox, they are typically diving with a higher percentage of oxygen and a lower percentage of nitrogen compared to regular air. If a diver switches back to air without properly analyzing the mix, they might not be aware of the potential changes in gas composition.

Analyzing the new mix is critical because it helps ensure that the diver is informed about the current gas content, which is crucial for managing potential nitrogen loading. Failure to do so could lead to an increased risk of nitrogen narcosis or decompression sickness if the diver does not properly account for the levels of nitrogen they will be exposed to during their dive. This emphasizes the importance of thorough preparation and safety protocols when transitioning between different gas mixtures in diving.