What is the primary reason divers choose EANx mixtures?

Divers choose EANx (Enriched Air Nitrox) mixtures primarily to reduce nitrogen intake and increase dive times. This is because EANx contains a higher percentage of oxygen compared to regular air, which reduces the percentage of nitrogen. By decreasing nitrogen absorption, divers can extend their bottom times and reduce the risk of nitrogen narcosis and decompression sickness.

Using EANx allows divers to stay at their planned depth for longer without exceeding safe nitrogen limits, making it particularly beneficial for recreational diving. Furthermore, increased oxygen content enhances overall dive safety by allowing for shorter surface intervals and more flexibility in dive planning. Thus, the main motivation behind selecting EANx mixtures centers around the advantages it offers in terms of managing nitrogen exposure and optimizing dive durations.