PADI Ray Rebreather [Distinctive]
Master semi-closed rebreather systems, extend bottom time, and operate with precision using the Dräger Ray SCR
Duration
3 days, 4 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 PADI Ray Rebreather Diver (Distinctive Speciality) introduces divers to semi-closed circuit rebreather (SCR) diving using the Dräger Ray SCR platform.
These systems operate on fixed mass flow and nitrox-based gas management, recycling a portion of breathing gas to increase efficiency, extend dive time, and reduce gas consumption compared to open circuit.
Training focuses on unit-specific procedures, gas selection, flow rate management, and failure response, where continuous monitoring and disciplined operation are essential.
Divers learn to operate a life-support system, managing gas behaviour, loop dynamics, and bailout procedures under increased task loading.
At N9BO℠, this course is delivered as systems-based technical training, developing control, redundancy awareness, and structured problem-solving.
Course Facts
- Course name: PADI Ray Rebreather Diver (Distinctive Speciality)
- Level: Technical rebreather (entry-level SCR)
- Minimum prerequisites: Minimum age 18 (15 with consent), PADI Enriched Air Diver (or equivalent)
- Ratio: Maximum 6 students per instructor (small groups recommended for quality training)
- Configuration: Dräger Ray SCR with bailout open circuit system
- Depth / environment: Limited by maximum PO₂ of 1.6 ATA and gas selection
- Format: Knowledge development + unit workshop + confined water + open water dives
- Duration: Minimum 3 days with 4 open water dives with at least 100 minutes accumulated bottom time
What You’ll Learn
- Assemble and configure the Dräger Ray SCR unit.
- Pack and manage scrubber systems.
- Monitor gas flow and loop dynamics.
- Control buoyancy and breathing characteristics within the loop.
- 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 PADI Enriched Air Diver certification (or equivalent).
- Be medically fit for diving.
FAQ
A semi-closed rebreather (SCR) recycles part of the breathing gas while adding fresh gas continuously, making it more efficient than open circuit systems.
Depth is limited by:
- Gas mixture used
- Maximum PO₂ of 1.6 ATA
- Unit and training limits
The risks are real:
- Hypoxia / hyperoxia
- CO₂ buildup (scrubber failure)
- Loop flooding
- Gas management errors
This course trains you to control, not eliminate risk through:
- Discipline
- Planning
- Procedure
Yes. Rebreather diving requires:
- Higher discipline
- Constant monitoring
- Strong procedural awareness
You are qualified to conduct dives using a semi-closed rebreather (unit-specific), within the limits of your training, gas selection, and PO₂ exposure. You may dive the unit independently, manage its life-support systems, and apply correct procedures for planning, operation, and failure response.
Ready to Enter Rebreather Diving?
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Go Pro with PADI Ray Rebreather Instructor
Advance into rebreather instruction and train divers to operate life-support systems safely and effectively using SCR platforms.
