PADI Enriched Air (Nitrox) Diver

This was my first PADI specialty course after earning my Open Water certification, and in my opinion, it’s one of the most worthwhile courses a new diver can take. I completed it within a month of finishing my Open Water and I’m really glad I did. I kept hearing other divers talk about Nitrox and how it allowed them to stay underwater longer and feel less tired after multiple dives — something that really caught my attention. That’s a huge benefit if you’re planning to do several dives in a day or over a weekend.

Now, the “less tired” part is definitely subjective — it can vary from diver to diver. Some people don’t notice much of a difference. But personally, I do. I feel noticeably less fatigued after diving with Nitrox compared to regular air, and for me, that alone makes the course well worth it.

What is the  PADI Enriched Air Diver course?

The PADI Enriched Air Diver course teaches you how to safely use air that contains more oxygen and less nitrogen than regular air. This means you absorb less nitrogen, which gives you longer no-decompression limits, shorter surface intervals, and — for many divers — less post-dive fatigue. It’s especially helpful if you’re doing multiple dives in a day or planning a dive trip where you’ll be diving several days in a row. There are no required dives and you can complete it in just a few hours. Once you’re certified, you get the normal PADI cert card and can dive with Nitrox anywhere in the world. It’s also one of those certifications that opens up more diving opportunities, since many liveaboards and dive resorts prefer or even require Nitrox-certified divers.

For me, it’s an easy win — you learn more about what’s happening inside your body when you dive, increase your bottom time, and get more out of every dive trip.

Why it's a Good Idea and Worthwhile to take the Course?

1. Longer Bottom Times

The biggest benefit of diving with Enriched Air (Nitrox) is that it contains more oxygen and less nitrogen than regular air. Because your body absorbs less nitrogen, you can stay down longer before reaching your no-decompression limit (NDL) — especially on dives between 60–100 feet (18–30 meters).

Example: On a typical 70-foot dive, Nitrox can give you 10–15 extra minutes of bottom time compared to air.

2. Shorter Surface Intervals

Since you’re absorbing less nitrogen, your body needs less time to off-gas between dives. That means shorter surface intervals and more time underwater — perfect for dive trips with multiple dives per day.

3. Less Fatigue After Diving

Many divers including myself report feeling less tired after Nitrox dives. While the science isn’t fully definitive, less nitrogen absorption likely plays a role — and most experienced divers agree that Nitrox dives feel easier on the body, especially during repetitive dives or multi-day dive trips.

4. It’s Required or Recommended at Many Dive Resorts and Liveaboards

Most dive boats and resorts offer Nitrox fills and even prefer divers use it — particularly on liveaboards or dive-intensive vacations. Having your PADI Enriched Air Diver card lets you take full advantage of these opportunities right away.

5. Builds Your Knowledge and Confidence

Taking the course helps you better understand gas physiology, oxygen exposure limits, and dive planning. It’s a short, knowledge-based specialty (no required open water dives), so you can complete it in a day or even pair it with your Advanced Open Water course.

6. Convenient and Cost-Effective

The course is one of the most affordable and easiest PADI specialties. It’s mostly classroom or eLearning based, and the certification is valid for life — no renewals needed.

In Short

The PADI Enriched Air Diver course makes you a safer, more capable, and more flexible diver. It’s the single most popular specialty course for a reason:

You dive longer, feel better, and open up more opportunities — all with minimal extra effort.