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Enriched Air Diver (Nitrox) Course
In the Open Water course, you learned about the effects of nitrogen on the body.
In modern diving, the risks from nitrogen exposure are greatly reduced.
Recent recreational diving research has focused on replacing some nitrogen with oxygen to extend dive times. The term "Enriched" means "to increase" or "to enhance," so Enriched Air refers to a breathing gas with a higher oxygen content than normal air, allowing longer, safer dives.
What is Nitrox?
Nitrox is a mixture of nitrogen and oxygen. When the oxygen content is higher than the 21% found in normal air, it is called Enriched Air Nitrox (EANx), commonly referred to as Nitrox. Using Nitrox allows for longer bottom times and shorter surface intervals. The table below shows the relationship between oxygen concentration, depth, and No-Decompression Limits (NDL).
| Depth | Normal Air | EANx 32% | EANx 36% |
| 18 m | 56 min | 95 min | 125 min |
| 22 m | 37 min | 60 min | 70 min |
So, how about it? Nitrox is ideal for divers who want to enjoy longer underwater experiences, observe marine life in detail, or take underwater photography. You will also learn how to use dive tables for Enriched Air, making this course recommended for divers interested in decompression theory.
In our PADI Nitrox course at HOBO-YA, you will not only analyze oxygen levels but also observe the enrichment process from regular air using our gas blending system. This hands-on approach deepens understanding and makes the course more engaging and practical.
Enriched Air Diver Course Details
| Eligibility | Open Water Diver certification or higher |
| Course Fee | 5,800 Baht |
| Number of Dives | 2 dives |
| Duration | 1 day |
| Learning Method | Online learning *Pre-study at home is possible |
| After Completion | You will be certified as an Enriched Air Diver, able to plan dives using Nitrox up to 40%, analyze the gas mix, execute dives safely, and log your dives. This extends no-decompression limits compared to regular air, allowing more time for underwater photography and marine life observation. |
After Completing the Nitrox Course
At HOBO-YA, we also offer fun diving using Nitrox. As with other courses, we recommend applying the knowledge gained during the course in real diving situations to gain more practical experience. Using Nitrox during fun dives helps you extend bottom time safely and enjoy a richer underwater experience.
You can also combine Nitrox for the first dive in the morning at deeper depths and regular air for the second dive.
For details, please consult your instructor.
