The ADVANCED OPEN WATER(EANx) course is designed to teach divers how to safely plan and execute dives using enriched air nitrox as a breathing gas. Enriched air nitrox refers to a blend of oxygen and nitrogen with a higher oxygen content than regular air. Here's an explanation of the PADI Enriched Air Nitrox course:

Benefits of Enriched Air Nitrox: The course begins with an introduction to the benefits of diving with enriched air nitrox. These benefits include extended no-decompression limits, shorter surface intervals, and reduced nitrogen absorption, which can provide longer bottom times and a potentially safer diving experience.

Dive Planning and Equipment: Participants learn how to plan dives using enriched air nitrox, including calculating maximum operating depths, oand xygen exposure limits, and analyzing gas mixtures using an oxygen analyzer. They also understand the importance of using dedicated enriched air nitrox scuba cylinders and appropriate dive computers or ditableses.

Physiology and Safety Considerations: The course covers the physiological effects of increased oxygen exposure, such as oxygen toxicity, and how to minimize the risks associated with diving with enriched air nitrox. Participants also learn about the importance of verifying the oxygen content of the gas mixture before each dive.