Ever wish you could dive just a little bit longer, but no decompression limits get in the way? Nitrox, also called Enriched Air or EANx, is a breathing gas with more oxygen and less nitrogen than standard air. Diving on it means your body absorbs nitrogen more slowly at depth, which extends your no-decompression limits, giving you the opportunity for more time on Roatan’s Mesoamerican Barrier Reef.
The PADI Enriched Air Diver course is PADI’s most popular specialty worldwide, and we offer it right here in Roatan, Honduras. Wondering if nitrox is right for you? See if you’re one of the four types of divers that benefit from diving with nitrox.
What Is Nitrox?
Standard scuba tanks hold ordinary air: 21% oxygen and 79% nitrogen. Nitrox shifts that ratio. The two most common recreational blends are EANx32 (32% oxygen) and EANx36 (36% oxygen), and the certification qualifies you to dive blends up to 40%.
One thing nitrox does not do is let you go deeper. It comes with a Maximum Operating Depth (MOD) tied to the oxygen percentage in your blend, and we’ll help you plan and confirm your MOD before every dive.
Less nitrogen in your breathing gas means less nitrogen dissolving into your tissues at depth, so you can stay within your no-decompression limits longer before needing to ascend. The difference is real: at 80 feet, a first dive on air gives you around 30 minutes of bottom time, while nitrox can stretch that to roughly 55 minutes, as long as your air consumption allows.
What’s the Benefit of Diving Nitrox
Some of Roatan’s most celebrated sites sit in the 60 to 90 ft (18 to 27 m) range, which is exactly where nitrox earns its keep. Here is what that means in practice:
- More time at Roatan Dive Sites like Mary’s Place.
At Mary’s Place, the Texas plateau, and the Odyssey and El Aguila wrecks , your dive computer counts down quickly on air. On nitrox, you get meaningfully more time before that limit signals a need to shallow up. - Stacked benefits across your whole trip
On day two and day three of repetitive diving, nitrox keeps each day’s nitrogen loading more manageable. - Less post-dive fatigue
There is no firm scientific proof here, but many of our guests say they feel less wiped out after a day on nitrox than after the same profile on air. - A conservative safety margin
Some divers use nitrox not to extend their limits but to stay well inside air-based limits and lower their risk of decompression sickness (DCS). That is especially worthwhile for anyone diving several times a day, working on their fitness, or at an age where circulation naturally slows (65 and up). - More time to hunt lionfish
These invasive fish favor deeper water, so nitrox gives you extra time to line up your shot. Not licensed to hunt yet? You can add your Roatan Marine Park lionfish hunting license in one easy afternoon with us.
Nitrox is also one of the most popular specialty credits toward the PADI Master Scuba Diver rating.
Curious whether nitrox is right for your Roatan trip? Contact us and we will help you plan it.
The PADI Enriched Air Diver Course at Sun Divers
The course is built to easily fit into a dive vacation without eating into precious time exploring Roatan underwater or on land.
How it works:
You complete the theory through PADI eLearning from home, at your own pace, before you ever board your flight. When you arrive, the theory work is done. The practical session with your instructor takes only a couple of hours and folds neatly into a standard dive day.
With Sun Divers, you’ll:
- Review with your instructor all nitrox theory to make sure there’s no gaps in your understanding of the risks and rewards of diving nitrox.
- Analyze your cylinder with an oxygen analyzer and confirm the mix in a nitrox log
- Set your dive computer for the correct EANx blend
- Determine your MOD and no-decompression limits
- Work through cylinder identification and labeling
We keep instruction small and personal, so this is a real conversation, not a group lecture.
Explore More PADI Courses at Sun Divers
Nitrox is one specialty in a full range of PADI courses we offer, from beginner certifications through advanced specialties. Building your skills alongside it? The Advanced Open Water certification is a natural next step and we offer a discount when you bundle nitrox with any course.
Take a look at what we offer, and let us help you build a dive trip that does more than check a box.
Frequently Asked Questions
Do I need to complete any dives to get nitrox certified?
No. The course is knowledge and skills based, completed through eLearning and a practical session. Optional application dives are available, and we strongly recommend them while you’re here to put your new learnings to practical use Each nitrox student receives on complimentary nitrox tank upon certification.
Can I use nitrox on any dive site in Roatan?
Once certified, you can use enriched air anywhere the depth stays within the MOD for your blend. Most popular sites, including Texas and Mary’s Place, fit comfortably within nitrox limits.
Is nitrox safe for newer divers?
Yes, provided you hold an Open Water Diver certification and complete the course. The training is designed to teach you how to manage oxygen exposure limits and dive computer setup, and our small-group instruction means you get individual attention throughout.
PADI Enriched Air (Nitrox) Diver Certification
What You'll Learn
You’ll receive instruction and hands-on training that teaches you:
- How to safely plan and execute dives on enriched air (nitrox).
- How to use an O2 analyzer
- How to determine your max operating depth and no-deco limits on nitrox
- How to program your computer for nitrox dives and planning
What's Included:
Classroom-based instruction, one free nitrox fill and specialty certification processing
What You Achieve:
Specialty certification with the ability to safely plan and conduct nitrox dives. Counts toward one of five specialties required for Master Scuba Diver rating.
Requisites:
12 years or older, Open Water certification or enrolled in the PADI Open Water course.
