The Professional Scuba Association International's Extended Range Nitrox Diver course is designed for those divers who wist to conuct dives beyon 45 meters but not exceeding 55 meters, Using staged decompression techniques for both depth and extended bottom times. This course uses air as the primary back gas and Nitros(s) as decompression gas(es). 

This course provides the necessary information for a PSAI Extended Range Nitrox Diver to know the proper procedures to:

• Determine appropriate Nitrox gas for planned divers as well as the appropriate decompression gases. 
• Determine appropriate diving equipment for planned Extended Range Nitrox Dives.
• Plan dives based in established limits and cautions for diving gases.
• Analyze and verify all gases for Extended Range Diving.
• Monitor and acknowledge the various effects of Gas Narcosis. 

A diver that successfully completes this PSAI Extended Range Nitrox Diver program will be qualified to:

• Plan and conduct extended range dives to depths not to exceed 55 meters utilising both air and Nitrox mixtures including decompression techniques.
• Evaluate the effects of Gas Narcosis for Extended Range Nitrox Dives
• Obtain appropriate diving gasses for Extended Range Nitrox Diving.
• Conduct Extended Range Nitrox dives in environments and conditions that approximate those of training.