TDI Air Diluent CCR Decompression Procedures Diver
Extend your CCR capability, conduct staged decompression dives, and operate with precision beyond no-decompression limits
Duration
5 days, 6 dives
Max Depth
40m / 130ft
Level
Technical (CCR Intermediate – Decompression)
Next Step
TDI Helitrox CCR
Overview
The TDI Air Diluent CCR Decompression Procedures Diver course is the second-level certification in CCR diving, expanding capability from minimal decompression into planned staged decompression diving.
Divers develop the ability to manage decompression obligations, gas switching strategies, and extended exposure profiles using a closed circuit rebreather with air as a diluent.
Training focuses on advanced dive planning, PO₂ management, bailout strategy, and decompression execution, where precision and discipline are critical.
At N9BO℠, this course is delivered as operational CCR training, building control, redundancy thinking, and execution under increased task loading.
Course Facts
- Course name: TDI Air Diluent Closed Circuit Rebreather Decompression Procedures Diver (Unit Specific)
- Level: Technical CCR (decompression level)
- Minimum prerequisites: Minimum age 18, Minimum 50 logged dives, TDI Advanced Nitrox Diver + TDI Decompression Procedures Diver (or equivalent), CCR diver with ~30 hours unit experience
- Ratio: Maximum of 4 students per instructor (small groups recommended for quality training)
- Configuration: Unit-specific CCR with air diluent, bailout system, and decompression gases
- Depth / environment: Maximum depth 40 metres / 130 feet, Staged decompression diving permitted, 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 5 days (Minimum 6 open water dives with at least 360 minutes accumulated bottom time)
What You’ll Learn
- Plan and execute CCR decompression dives.
- Manage decompression schedules and ascent strategies.
- Control PO₂ setpoints throughout decompression phases.
- Execute gas switches and oxygen-rich decompression strategies.
- Monitor CNS exposure and oxygen toxicity limits.
Prerequisites
- Be at least 18 years old.
- Have a minimum of 50 logged dives.
- Hold TDI Advanced Nitrox Diver certification (or equivalent).
- Hold TDI Decompression Procedures Diver certification (or equivalent).
- Be a CCR diver with sufficient unit experience
- Be medically fit for diving.
FAQ
This course moves from minimal decompression to full staged decompression diving.
You will learn to manage:
- Decompression stops
- Extended dive profiles
- More complex gas planning
You are certified to a maximum of 40 metres / 130 feet, but now with planned decompression obligations.
You will learn:
- Decompression planning and execution
- Oxygen management during ascent
- Bailout strategy for decompression dives
- CNS and exposure tracking
- Missed decompression obligations
- Oxygen toxicity during decompression
- Equipment or gas failures during extended exposure
You are qualified to conduct unit-specific CCR dives with air diluent involving staged decompression, managing PO₂, decompression schedules, and bailout procedures within your training limits.
Ready to Expand Your CCR Capability?
Send us your certifications and CCR experience. We’ll train you to execute decompression dives with precision, discipline, and full system control.
Go Pro with Air Diluent CCR Decompression Procedures Instructor
Progress into advanced CCR instruction and train divers in decompression procedures, gas management, and life-support system operation at a technical level.
