The SSI Enriched Air Nitrox (40%) course teaches you how to safely plan and dive with nitrox mixtures up to 40% oxygen. This specialty is one of the most valuable upgrades for any diver — giving you longer no‑decompression limits, shorter surface intervals, and more efficient dive planning.
You’ll learn how to analyse nitrox cylinders, set your dive computer correctly, understand oxygen exposure, and make informed decisions that enhance both safety and enjoyment underwater. This course is classroom‑based with practical skills, making it ideal for divers who want to extend their bottom time without adding complexity to their diving.
How It Works
Digital Learning
Complete your SSI Enriched Air Nitrox online training before attending your classroom session.
Classroom Session
Your instructor will guide you through:
- Oxygen physiology
- Maximum operating depth (MOD)
- CNS and OTU exposure
- Gas analysis and labelling
- Dive computer setup
- Nitrox dive planning
Practical Skills
You’ll practise analysing cylinders, confirming oxygen percentages, and applying nitrox planning rules to real‑world scenarios.
Open Water Dives
This course does not require open‑water dives.
However, you can apply your new skills immediately during any future dive trip or specialty course.
A Community That Dives Together
At Overland Underwater, learning Nitrox isn’t just about numbers and tables — it’s about joining a community that supports your progression. You’ll train alongside divers who are expanding their skills, sharing knowledge, and building confidence together.
Expect a relaxed, friendly learning environment where questions are encouraged and everyone is invested in your success.
What’s Included
- SSI digital learning
- Classroom session
- Instructor‑led training
- All equipment provided for gas analysis
- Air fills included for any practical components
- Insurance coverage during training
- Full SSI app access and digital certification card
What’s Not Included
- Travel
- Accommodation
- Food and drink
What You’ll Need
- Notebook or digital device for notes
- SSI app profile set up with photo and details
- Logbook (digital or physical)
- Personal items (drink, snacks, etc.)