At approximately what depth does nitrogen narcosis generally begin to affect a diver?

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Nitrogen narcosis is a condition that can affect divers due to the increased partial pressure of nitrogen at deeper depths. As a diver descends, the ambient pressure increases, causing a greater amount of nitrogen to dissolve in the body's tissues and bloodstream.

Generally, nitrogen narcosis symptoms begin to manifest at depths around 100 feet, with many divers reporting noticeable effects around that depth. This is attributed to the physiological changes that occur as pressure increases, which can lead to impairments in judgment, coordination, and reaction time.

While some divers may start to feel symptoms of narcosis at shallower depths, the threshold recognized for more pronounced effects and increased risk of impairment tends to be closer to 100 feet. As a result, identifying 99 feet as the depth where nitrogen narcosis typically begins to have a significant impact aligns with accepted diving practices and experiences reported by divers.

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