TDI Extended Range Diver Course – Warrior Dive Adventure
Learn to Dive Safely to 55 Metres Using Deep Air and Decompression Techniques
Looking to explore deep dive sites beyond 40 metres, but limited by helium availability? The TDI Extended Range Diver Course at Warrior Dive Adventure gives you the training and experience to conduct deep dives to 55 metres (180 feet) using compressed air as your breathing gas.
This course is ideal for advanced technical divers who want to explore deep wrecks, walls, and oceanic sites where helium may be scarce or unavailable. Learn to safely manage nitrogen narcosis, execute staged decompression, and dive deeper using air with nitrox or oxygen for decompression.
Why Take the TDI Extended Range Course?
While helium-based trimix diving is often recommended for extreme depths, there are many regions around the world where helium is expensive, inaccessible, or prohibited.
The TDI Extended Range certification allows you to:
Safely dive to 55 metres on air
Manage and minimize nitrogen narcosis through proper planning
Use nitrox or oxygen for accelerated decompression
Practice deep air diving with redundant systems and safety protocols
This is a key certification for divers preparing for remote expeditions, or operating in areas with limited access to trimix.
Who Is This Course For?
This course is designed for experienced technical divers who:
Need to dive deeper than 40m without helium
Want to build decompression diving skills using air
Operate in remote or resource-limited dive environments
Are preparing for TDI Trimix or CCR courses
Why Consider Upgrading to Helitrox or Trimix?
While deep air diving is permitted through this course, the industry trend has shifted toward helium-based mixes (trimix or helitrox) due to:
Reduced Equivalent Narcotic Depth (END)
Lower gas density for easier breathing
Improved mental clarity, awareness, and reaction time
Increased safety and efficiency at depth
For dives below 40 metres—especially in cave or overhead environments—most training agencies now recommend or require trimix certification.
Course Prerequisites
To enroll in the TDI Extended Range Diver Course, students must:
Be 18 years or older
Hold certifications in both TDI Advanced Nitrox and TDI Decompression Procedures
Provide proof of 100+ logged dives, with at least 25 dives deeper than 30 metres
What You’ll Learn
This course builds advanced-level diving proficiency for deep air dives, covering:
Core Topics:
Gas planning and oxygen exposure limits
Narcosis management and dive safety
Redundant gas supply and decompression strategy
Decompression theory and accelerated decompression
Use of nitrox and oxygen for staged deco stops
Dive planning tools, checklists, and emergency procedures
Equipment Focus:
Technical dive gear and redundant systems
Proper configuration of decompression regulators and gas switches
Equipment maintenance and troubleshooting for deep air dives
Course Schedule
| Day | Activities |
|---|---|
| Day 1 | 9:00 AM – 5:00 PM: Advanced Theory & Gear Configuration |
| Day 2 | 9:00 AM – 5:00 PM: Decompression Theory + Open Water Dives 1 & 2 |
| Day 3 | 9:00 AM – 5:00 PM: Open Water Dives 3 & 4 |
💡 Need a Deco Regulator Set?
Visit our online dive store for specialized decompression gear, stage bottles, and regulator packages.
Certification Outcome
Graduates of this course are certified as TDI Extended Range Divers, qualified to:
Conduct deep air dives to 55 metres (180 feet)
Execute staged decompression dives using nitrox or oxygen
Dive in regions with limited helium access using best-practice protocols
Take the Next Step: Helium-Based Deep Diving
After completing this course, you’ll be ready to upgrade to:
TDI Trimix Diver Course – Dive deeper using helium blends and reduce narcosis risk
Enroll in the TDI Extended Range Diver Course at Warrior Dive Adventure
Train with Warrior Dive Adventure and gain the skills, knowledge, and confidence to perform deep air dives to 55 metres using advanced decompression techniques. Whether you're preparing for exploration, research, or remote dive operations, this course is your path to deeper, safer technical diving.
👉 Contact us today to register, ask about technical diving packages, or speak with a TDI instructor about your ideal path toward trimix or CCR certification.