What is the primary benefit of using Enriched Air Nitrox for scuba diving?

The primary benefit of using Enriched Air Nitrox for scuba diving lies in reduced nitrogen absorption. When divers use Nitrox, which has a higher concentration of oxygen and a lower concentration of nitrogen compared to regular air, they experience a decrease in the amount of nitrogen their bodies absorb during a dive. This is significant because nitrogen is the gas that can contribute to nitrogen narcosis and decompression sickness.

By using Nitrox, divers can often extend their no-decompression limits and enjoy longer bottom times at certain depths compared to air. This means they can explore more and potentially reduce the risk associated with rapid ascents and decompression stops. While other choices, such as visibility, costs, and buoyancy control, can contribute to a diver's experience, they do not fundamentally relate to the main safety and practical benefits that Nitrox provides. Reduced nitrogen absorption directly impacts a diver's physiological response and is therefore the most critical advantage of using Enriched Air Nitrox.