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TDI Advanced Nitrox Diver


Course Overview

The TDI Advanced Nitrox Diver course allows divers to use enriched air nitrox (EAN 21 to EAN 100) up to a maximum depth of 40 meters/130 feet for non-staged decompression dives. It is foundational for technical diving and often combined with the TDI Decompression Procedures course.

Who This Course Is For

  • Certified nitrox divers aiming to enhance their knowledge and skills with gas mixes containing over 40% oxygen.

  • Divers interested in advancing their technical diving education.

Course Prerequisites

  • Minimum age: 18 (or 15 with parental consent).

  • Certification: TDI Nitrox Diver or equivalent.

  • At least 25 logged open water dives.

What You Can Expect to Learn

  • In-depth knowledge of diving physics and physiology with high-oxygen gas mixes.

  • Gas planning, dive tables, computers, and limitations for oxygen and nitrogen.

  • Equipment considerations, cylinder labeling, nitrox mixture analysis, gas blending, and oxygen service ratings.

Skills to Be Developed

  • Buoyancy control, safety stops, and emergency management.

  • Team awareness and communication.

  • Air-sharing techniques and stress analysis.


  • Dive using EAN 21 to 100% oxygen under conditions similar to training.

  • Eligibility for TDI Decompression Procedures, Semi-closed Rebreather, and Closed Circuit Rebreather courses.

Certification Requirements

  • Complete the course and written exam.

  • Safely and efficiently meet all open water requirements.

  • Demonstrate sound judgment in dive planning and execution.

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