TDI Azimuth Rebreather Diver
Enter the world of rebreather diving, extend bottom time, and operate with precision using semi-closed systems
Duration
3 days, 6 dives
Max Depth
Limited by PO₂ (max 1.6 ATA) and gas selection
Level
Technical (Rebreather Entry – SCR)
Next Step
Advanced SCR / CCR Diver
Overview
The TDI Azimuth Rebreather Diver course introduces divers to semi-closed circuit rebreather (SCR) diving, using the Azimuth unit.
Unlike open circuit, SCR systems recycle breathing gas, significantly increasing efficiency, reducing gas consumption, and extending dive time.
Training focuses on unit operation, gas management, failure response, and disciplined procedural diving, where control and awareness are critical.
Divers learn to operate a life-support system where errors must be identified and corrected immediately, making this course a major step into technical diving.
At N9BO℠, this course is delivered as systems-based training, building precision, redundancy awareness, and problem-solving under load.
Course Facts
- Course name: TDI Azimuth Semi-Closed Rebreather Diver
- Level: Technical rebreather (entry-level SCR)
- Minimum prerequisites: Minimum age 18 (15 with consent), TDI Nitrox Diver (or equivalent)
- Ratio: Maximum of 4 students per instructor (small groups recommended for quality training)
- Configuration: Azimuth semi-closed rebreather with bailout open circuit system
- Depth / environment: Maximum depth 40 metres / 130 feet, without decompression, and limited by a maximum PO₂ of 1.6 ATA and gas selection
- Format: Academic development + unit workshop + confined water + open water dives
- Duration: Typically completed in 3 days (Minimum 6 open water dives with at least 150 minutes accumulated bottom time)
What You’ll Learn
- Assemble, configure, and pre-dive check the Azimuth SCR.
- Pack and manage scrubber systems.
- Monitor PO₂ and gas flow during the dive.
- Execute bailout procedures to open circuit.
- Respond to failures including flooding, gas issues, and system faults.
Prerequisites
- Be at least 18 years old (15 with parental consent).
- Hold TDI Nitrox Diver certification (or equivalent).
- Be medically fit for diving.
FAQ
A semi-closed rebreather (SCR) partially recycles breathing gas, adding fresh gas continuously while removing carbon dioxide, making it more efficient than open circuit systems.
Depth is not fixed — it is limited by:
- Gas mixture used
- Maximum PO₂ (1.6 ATA)
- Manufacturer recommendations
Key risks include:
- Hypoxia / hyperoxia
- CO₂ breakthrough (scrubber failure)
- Loop flooding
- Equipment malfunction
This course trains you to detect and manage failures immediately.
No, but rebreather diving requires:
- Higher discipline
- Constant monitoring
- Strong procedural awareness
Upon successful completion of this course, you may engage in no decompression diving activities utilising the unit-specific semi-closed-circuit rebreather to a maximum depth of 40 Metres/130 Feet, without decompression, utilising nitrox mixes not exceeding your level of certification.
Ready to Enter Rebreather Diving?
Send us your certifications and experience. We’ll guide you into rebreather diving with structure, discipline, and precision.
Go Pro with TDI Azimuth Rebreather Instructor
Advance into rebreather instruction and train divers to operate life-support systems safely and effectively using SCR platforms.
