diving with enriched air rather than standard air you can extend your no
decompression limits. This means more time underwater. For example, if you
dive to 50 feet on air, your no decompression limit is 80 minutes. But,
diving on EANx36 gets you 220 minutes of no decompression time - an increase
of 140 minutes.
The PADI Enriched Air Diver Specialty certification emphasizes the theoretical and operational considerations involved with enriched air diving. You'll receive your PADI Enriched Air Crew-Pak, which also includes an Enriched Air 32 percent Table, Enriched Air 36 percent Table and Equivalent Air Depth/Oxygen Exposure Table.