TDI Advanced Nitrox Diver
Master high-oxygen gas use, refine your control, and take the first true step into technical diving
Duration
2 days, 4 dives
Max Depth
40m / 130ft or diver’s current certification level
Level
Technical Foundation
Next Step
TDI Decompression Procedures
Overview
The TDI Advanced Nitrox Diver course is designed to expand your knowledge and skills in using enriched air nitrox mixtures from 21% up to 100% oxygen.
This course develops advanced gas management, oxygen exposure control, and equipment configuration required for technical diving. While dives remain within non-decompression limits, the program introduces the discipline and procedures needed for more complex dive planning.
At N9BO℠, this is where divers transition from recreational thinking to technical execution: building the precision, awareness, and system management required for decompression and mixed gas diving.
Course Facts
- Course name: TDI Advanced Nitrox Diver
- Level: Technical foundation course
- Minimum prerequisites: Minimum age 18 (15 with parental consent), TDI Nitrox Diver (or equivalent), proof of 25 logged dives
- Ratio: Instructor discretion (small groups recommended for quality training)
- Configuration: Technical or advanced recreational configuration with nitrox-compatible equipment and stage/decompression cylinders where appropriate
- Depth / environment: Maximum 40m / 130ft, non-decompression diving within current certification limits
- Format: Academic development + practical skills + open water performance dives
- Duration: Typically completed in 2 days (4 open water dives)
What You’ll Learn
- Use nitrox mixes from 21% to 100% oxygen safely and effectively.
- Plan dives using multiple gas mixes and contingency strategies.
- Configure equipment for advanced nitrox and stage/deco use.
- Execute gas switches with precision and control.
- Develop the discipline required for decompression and technical diving.
Prerequisites
- Be at least 18 years old (15 with parental consent).
- Be certified as a TDI Nitrox Diver or equivalent.
- Provide proof of at least 25 logged dives.
- Be medically fit for diving.
FAQ
This course is for divers ready to move beyond recreational nitrox and develop the skills required for technical diving, including advanced gas use and dive planning.
No. This course is conducted within non-decompression limits, but it prepares you directly for decompression training.
You will be qualified to use nitrox mixes from 21% to 100% oxygen, including high-oxygen decompression gases.
Advanced Nitrox is the foundation of technical diving. It introduces gas switching, oxygen management, and planning skills required before progressing to decompression procedures.
Yes. It is commonly taught alongside TDI Decompression Procedures, forming the core entry point into technical diving.
Ready to Enter Technical Diving?
Send us your current certification level and experience. We’ll help you build the foundation required for safe and controlled technical diving progression.
Go Pro with TDI Advanced Nitrox Instructor
Take your advanced gas management skills to the professional level and start teaching technical diving foundations. Delivered by a TDI Instructor Trainer, this pathway builds the precision, control, and instructional ability required to train divers safely in advanced nitrox and prepare them for decompression diving.
