What method should be employed when transitioning from an EANx dive to air diving?

The method of transitioning from an Enriched Air Nitrox (EANx) dive to air diving involves adhering to proper ascent rates and ensuring that the nitrogen load from the EANx dive has been adequately eliminated.

When switching from an EANx dive, it’s essential to consider the differences in nitrogen absorption based on the gas mixture used during the dive. EANx generally has a higher percentage of oxygen and a lower percentage of nitrogen when compared to regular air, which affects the way nitrogen is absorbed in the body.

Therefore, managing ascent rates becomes critical for allowing time for nitrogen off-gassing to occur safely. Slow and controlled ascents help reduce the risk of decompression sickness, which can result from rapid changes in pressure after diving.

Additionally, ensuring that the nitrogen load from the EANx dive has been adequately eliminated ensures that divers are not exceeding safe limits when they subsequently breathe air. This transition is a delicate process that helps to maintain safety by avoiding potential issues that could arise from sudden changes in the gas mixture being inhaled.