TDI Advanced Nitrox is widely considered the foundation of technical diving training
TDI Advanced Nitrox Course
Take the first real step into technical diving with the TDI Advanced Nitrox course in Phuket, Thailand. This course builds on your existing nitrox knowledge and introduces you to the use of high oxygen gas mixes up to 100%, advanced dive planning, and the core skills required for technical and decompression diving.
Whether you’re aiming for longer bottom times, preparing for decompression procedures, or planning to move into CCR or trimix diving, the TDI Advanced Nitrox course is the essential foundation.
What Is the TDI Advanced Nitrox Course?
The TDI Advanced Nitrox course is a technical-level training program that qualifies divers to use EAN21 through 100% oxygen within their current depth limits, up to a maximum of 40 metres (130 feet).
Unlike basic nitrox training, this course focuses on:
- high oxygen exposure management
- gas switching procedures
- advanced equipment configuration
- precision buoyancy and team diving skills
It is widely considered the entry point into technical diving and is often taken alongside the TDI Decompression Procedures course.
Why Take Your Advanced Nitrox Course in Phuket?
Training in Phuket offers ideal conditions for developing technical diving skills:
- Warm water and stable conditions
- Easy access to boat-based dive sites
- Real-world environments for skill application
- Excellent visibility for team diving practice
This allows you to build confidence using technical equipment in practical diving scenarios, not just controlled environments.
Who Is This Course For?
The TDI Advanced Nitrox course is designed for divers who want to progress beyond recreational limits.
This course is ideal for:
- Nitrox-certified divers looking to extend bottom time
- Divers preparing for decompression diving
- Underwater photographers and scientific divers
- Divers planning to move into CCR or technical diving
- Anyone wanting to improve precision and control underwater
What You Will Learn
This course expands your understanding of nitrox diving and introduces the principles required for technical diving progression.
Theory Topics Include:
- Physics and physiology of high oxygen exposure
- Oxygen toxicity and CNS tracking
- Nitrogen absorption and decompression theory
- Dive planning using tables and software
- Gas switching procedures and protocols
- Equipment requirements for technical diving
- Oxygen cleaning and gas blending basics
Practical Skills You Will Develop
During in-water training, you will refine essential technical diving skills, including:
- Advanced buoyancy and trim control
- Stage cylinder handling and configuration
- Gas switching procedures
- Air sharing and emergency drills
- Valve shutdown and regulator management
- SMB deployment and ascent control
- Team awareness and communication
These skills form the foundation for all future technical and CCR diving.
Course Prerequisites
To enrol in the TDI Advanced Nitrox course, you must:
- Be at least 18 years old
- Hold a Nitrox Diver certification (TDI or equivalent)
- Have a minimum of 25 logged open water dives
Course Structure
Typical course duration in Phuket:
- Day 1: Theory and confined water training
- Day 2–3: Open water training dives
You will complete multiple dives focused on skill development, gas management, and controlled execution of dive plans.
The AN/DP combined program
The TDI Advanced Nitrox course and TDI Decompression Procedures course can be combined into one program often called AN/DP. The combined program is popular because decompression diving requires advanced gas knowledge, yet relies on the same technical diving fundamentals, making them more effective together.
👉 find out more about our AN/DP Program in phuket
Equipment Configuration
Training is conducted using a technical diving setup, which may include:
- Twinset or sidemount configuration
- Stage cylinder for decompression gas
- Regulators suitable for oxygen service
- Dive computer capable of handling multiple gases
All equipment can be provided if required.
What Comes After Advanced Nitrox?
Completing the TDI Advanced Nitrox course opens the door to:
- TDI Decompression Procedures course
- Technical decompression diving
- CCR (rebreather) training
- Trimix and deeper diving
This course is a mandatory step for most advanced technical diving pathways.
Benefits of the TDI Advanced Nitrox Course
- Use enriched air nitrox up to 100% oxygen
- Extend bottom time safely
- Improve gas efficiency and dive planning
- Develop advanced buoyancy and control
- Prepare for decompression and technical diving
- Build confidence with technical equipment
Why Choose Us for Your TDI Advanced Nitrox Course?
- Experienced technical diving instructors
- Real-world training in Phuket dive environments
- Small group sizes for focused training
- High-quality technical equipment
- Strong progression pathway into advanced courses
You won’t just complete the course—you’ll build the skills required to move confidently into technical diving.
Contact Us
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