TDI Nitrox Diver
Extend your bottom time, reduce surface intervals, and take your first step into technical diving
Duration
1 day, 2 dives (optional)
Max Depth
Within your current certification level
Level
Recreational / Foundation
Next Step
TDI Adv Nitrox / TDI Deco Procedures
Overview
The TDI Nitrox Diver course is designed to train divers in the benefits, hazards, and proper procedures for using enriched air nitrox mixes from 22% to 40% oxygen.
Using nitrox allows divers to extend no-decompression limits, reduce nitrogen loading, and improve overall dive efficiency. This course focuses on safe gas management, oxygen exposure limits, and dive planning using nitrox mixtures.
At N9BO℠, we position Nitrox not just as a recreational upgrade, but as the foundation of all technical diving progression, building the awareness and discipline required for advanced gas use.
Course Facts
- Course name: TDI Nitrox Diver
- Level: Recreational / foundational gas course
- Minimum prerequisites: Minimum age 18 (15 with parental consent), SDI Open Water Diver or equivalent
- Ratio: Instructor discretion (small groups recommended for quality training)
- Configuration: Standard recreational diving equipment with nitrox-compatible cylinders and analysis tools
- Depth / environment: Non-decompression diving within current certification limits
- Format: Academic development (no mandatory dives required)
- Duration: Typically completed in one day (no minimum dive requirement)
What You’ll Learn
- Benefits and risks of diving with enriched air nitrox.
- Oxygen exposure limits (PO₂) and CNS management.
- Equivalent air depth (EAD) calculations.
- Gas analysis procedures and cylinder labeling.
Prerequisites
- Be at least 18 years old (15 with parental consent).
- Be certified as an Open Water Diver (SDI or equivalent).
- Be medically fit for diving.
FAQ
This course is for certified divers who want to extend bottom time, reduce surface intervals, and improve safety margins using enriched air nitrox.
No. The TDI Nitrox Diver course is primarily academic and can be completed without open water dives, although dives may be added at instructor discretion.
You will be certified to use nitrox mixtures from 22% up to 40% oxygen.
Nitrox is the foundation for all advanced gas use in technical diving. Understanding oxygen exposure, gas planning, and analysis is critical before progressing to decompression or mixed gas diving.
No. Nitrox extends bottom time and reduces nitrogen loading, but depth limits remain within your current certification level.
Ready to Dive Longer and Safer?
Send us your certification level and preferred dates. We’ll get you set up with nitrox training and ready to maximize your time underwater.
Go Pro with TDI Nitrox Instructor
Take your nitrox skills to the professional level and start teaching enriched air diving with confidence. Delivered by a TDI Instructor Trainer, this pathway builds the knowledge, precision, and instructional ability required to train divers safely within TDI standards.
