What might a diver using NAUI Nitrox dive tables need to calculate for safety?

When using NAUI Nitrox dive tables, one of the primary considerations for a diver's safety is understanding gas mixture ratios. Nitrox is a mixture of nitrogen and oxygen, with a higher proportion of oxygen compared to regular air. This higher oxygen content allows divers to extend their bottom time at certain depths and reduce nitrogen absorption, which can mitigate the risk of nitrogen narcosis and decompression sickness.

However, using Nitrox requires precise calculations of the mixture ratios to ensure that the partial pressures of oxygen do not exceed safe limits at any given depth. Exceeding these limits can lead to oxygen toxicity, which is a serious hazard during dives. Therefore, understanding and calculating gas mixture ratios is crucial for both proper planning and safety when using Nitrox.

While factors like decompression schedules, water temperatures, and current speeds are important for planning a dive, they do not directly involve the specific calculations needed for safety related to the gas mixture being used. Therefore, focusing on gas mixture ratios is essential for safe diving practices when utilizing Nitrox.