Computer Nitrox Diver
Extend your bottom time and increase your enjoyment on every dive.
Switch to Nitrox and turn every dive into a longer and more enjoyable experience. By breathing an oxygen-enriched mix, you extend your bottom time and increase the flexibility in your dive profiles. It’s the smart choice for divers who want to make the most of every minute underwater, feel more confident, and enjoy every second in the blue.
Enjoy longer dives
The real magic of Nitrox lies in its higher oxygen content and lower nitrogen levels. This means you can safely stay underwater longer than with regular compressed air and truly get the most out of every dive.
Less nitrogen, safer dives
With Nitrox you can dive for the same amount of time as you would on air, but with less nitrogen absorbed, giving you a more relaxed experience underwater and allowing you to focus on enjoying the dive instead of thinking about limits.
Up to 40% oxygen
This course gives you access to mixes from 22% to 40% oxygen, including the most popular blends like Nx32 and Nx36. More flexibility, more control, and the freedom to adapt your diving to every adventure.
Start Your Nitrox Adventure Today
Discover how easy it is to become an SDI Nitrox Diver!
There are two ways to start your journey as a Computer Nitrox Diver. You can choose the flexibility of eLearning with an online code, or begin your training directly through a nearby SDI Dive Center. Below, we explain each option so you can choose the one that suits you best.
eLearning Code
With the eLearning course, you are in control. Study at your own pace from home, on vacation, or wherever suits you best. Dive into interactive content, videos, and quizzes that prepare you for real buoyancy mastery. Once you’re set, we’ll help you choose the perfect dive center, whether it is close to home or part of your next getaway. Your in water coaching will refine horizontal trim, precise weighting, streamlined configuration, efficient propulsion, and smooth ascents with solid safety stops. You will build dependable control that lowers effort, reduces gas use, and preserves visibility.
Diving Center
It all starts with the right dive center. Your scuba journey begins by choosing your SDI Dive Center. From day one, they’ll guide you through every step — from starting your eLearning to completing your practice sessions and training dives, all under the supervision of a certified SDI Instructor. Once you’ve selected your dive shop, you’ll purchase your eLearning and dive right in. Learn Where It Works Best for You. Pick a dive shop close to home or at your dream vacation spot — wherever you want to begin your underwater adventure, there’s an SDI center ready to welcome you.
Some of the key skills you’ll gain during the course
Gas Analysis
You’ll learn how to use an oxygen analyzer and check the mix you breathe. Step by step, you’ll master the safety protocols and get into the habit of always verifying your gas before every dive.
Cylinder Labeling
You’ll be taught how to properly label your cylinder and log the key details of your mix: oxygen percentage, maximum operating depth, and essential data to plan safer dives.
Oxygen Toxicity
You’ll understand the importance of respecting depth limits for each mix to avoid oxygen toxicity. You’ll know how to plan your dives while staying well within safe margins.
Dive Computer Setup
You’ll learn to set your dive computer for Nitrox by entering the oxygen percentage of your mix. This ensures accurate calculations and gives you the confidence to dive smarter.
Questions? Let’s dive in!
Who this course is for:
- Open Water divers (including Junior Open Water divers) who want to learn how to use nitrox mixtures up to 40% with a nitrox-programmable dive computer.
Course prerequisites:
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Certification: SDI Open Water Scuba Diver, SDI Junior Open Water Scuba Diver, or equivalent.
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Minimum age: 18, or 10 years old with parental consent.
What you can expect to learn:
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History of Enriched Air Nitrox (EAN).
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Physiology of oxygen and nitrogen.
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Equipment considerations (less than and more than 40% oxygen).
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Dive computers: mix adjustable, air integrated, nitrox programmable.
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Advantages and disadvantages:
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Extending no-decompression time or shortening surface intervals.
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Oxygen toxicity hazards and depth limits.
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Myths and facts about EAN.
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Equivalent Air Depth (EAD): introduction for demonstration.
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Procedures:
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Use and theory of an oxygen analyzer.
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Gas analysis and logging.
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Completing and signing fill station EAN logs, including MOD and O₂ content.
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SDI Computer Nitrox Diver requirements:
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Score at least 80% on the Knowledge Quest or online final exam (with full remediation).
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Analyze at least 2 nitrox cylinders and label them according to local practices/regulations.
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Log at least 1 nitrox cylinder analysis including MOD and oxygen content.
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Program a nitrox computer with a mix between 22–40% oxygen.
How to take this course.
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Students can complete the SDI Computer Nitrox Manual and Knowledge Quest, or take the online eLearning course.
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Training is academic only — no dives are required.
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Certification is issued upon successful completion of knowledge and skill requirements.
Review the Course Standards and Procedures
SDI Computer Nitrox Diver
