Why might divers choose to use Nitrox instead of air?

Prepare for the IANTD Enriched Air (Nitrox) Test. Enhance your understanding with multiple choice questions and explanations. Boost your confidence and readiness!

Divers might choose to use Nitrox instead of air primarily to extend their bottom times and reduce nitrogen absorption. Nitrox is a blend of nitrogen and oxygen, with a higher oxygen content than regular air, which typically consists of about 21% oxygen and 79% nitrogen. By increasing the proportion of oxygen in the mix, the nitrogen levels are proportionately lower. This reduction in nitrogen absorption is beneficial because it can help reduce the risk of decompression sickness, commonly known as "the bends," and allow divers to stay at depth longer without increasing their exposure to nitrogen.

In addition to longer bottom times, divers utilizing Nitrox can experience a slower rise in nitrogen levels in their bodies during dives. This decrease in nitrogen intake helps in managing saturation levels more effectively. Divers employing Nitrox generally enjoy greater flexibility in planning their dives, as well as possibly needing shorter surface intervals between dives.

The other options are not logically connected to the choice of using Nitrox. Decreasing visual clarity underwater does not relate to the benefits of Nitrox; in fact, visual clarity is more dependent on environmental conditions rather than the gas mixture. Avoiding the use of diving equipment is irrelevant since divers still need their gear regardless of the gas they use. The claim about minimizing

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