What is the primary advantage of using enriched air nitrox (EANx) for diving?

The primary advantage of using enriched air nitrox (EANx) for diving is that it allows for longer bottom times and shorter surface intervals. Enriched air contains a higher percentage of oxygen and a lower percentage of nitrogen compared to regular air. This higher oxygen content enables divers to extend their no-decompression limits, which means they can spend longer at certain depths without needing to make a decompression stop on their ascent.

Additionally, the reduced nitrogen levels in EANx decrease the nitrogen absorption during the dive, which can lead to shorter surface intervals when divers surface and prepare for the next dive. Essentially, this configuration increases the efficiency of dives and allows for more time spent exploring underwater, making it a valuable option for many divers seeking to maximize their experience.

The other options do not accurately describe the advantages of EANx. While it is true that using enriched air does influence gear management, it does not significantly reduce the amount of gear needed. EANx does not inherently affect buoyancy underwater; a diver's buoyancy is primarily influenced by their body composition, exposure suit, and weights. Lastly, while using EANx can reduce the risk of decompression sickness by allowing for longer dives at shallower depths, it does not fully eliminate that risk