Why is the understanding of oxygen toxicity crucial for Nitrox divers?

Understanding oxygen toxicity is crucial for Nitrox divers because it can lead to harmful central nervous system effects. When diving with enriched air mixtures, the partial pressure of oxygen increases, which can lead to toxicity if it reaches certain levels. Symptoms of oxygen toxicity can include visual disturbances, tinnitus, seizures, and other neurological complications. These risks are particularly pertinent at greater depths, where the partial pressure of oxygen is higher, making it essential for divers to know their limits and the equivalent narcosis depths of their chosen gas mix.

The effects of oxygen toxicity are vital for dive planning, as they influence depth limits and the duration of exposure to specific gas mixtures. This understanding helps divers manage their ascent profiles and stay within safe operational limits to avoid serious health risks. Cognizance of oxygen toxicity thus becomes a fundamental aspect of ensuring safety and enhancing the overall diving experience.