The Expedition Rebreather Diver (75m) course is structured around a rigorous curriculum that balances advanced theory with extensive in-water application. It is designed to build confidence, precision, and discipline needed for deep, technical CCR diving in remote or high-risk environments.
Each dive is followed by a thorough debrief to assess performance, decision-making, and equipment management. Divers are expected to maintain detailed dive logs and gas usage records throughout the course.
Training may be customised slightly depending on local conditions or rebreather unit type, but all PSAI standards must be met. As always, adventuro lists centres equipped to support your technical diving ambitions—whether you're looking to train, rent gear, or join a deep expedition.
Upon certification, you’ll be qualified to conduct CCR dives to a maximum depth of 75 metres (246 feet) using mixed gas and staged decompression with appropriate bailout strategies. This opens the door to deep wrecks, advanced cave penetrations, and remote dive expeditions that require a high degree of self-sufficiency and planning rigor.
You’ll also be prepared for expedition-style diving where surface support may be limited or unavailable, and where mission-specific objectives (photography, survey, recovery, etc.) demand advanced competence. This certification can also serve as a prerequisite for instructor-level CCR courses or further specialisations like hypoxic trimix or full cave on rebreather.
Remember, while this course expands your capabilities, each dive must still be planned within the limits of your training, equipment, and environmental conditions. Many adventuro centres offer further training and guided technical trips to help you gain experience safely.
The PSAI Expedition Rebreather Diver (75m) course typically takes 5 to 7 days to complete. This includes academic sessions, confined water drills, and a minimum of 6 open water dives—several of which will be staged decompression dives beyond 60 m / 197 ft. Scheduling may vary by training centre and environmental conditions.
The PSAI Expedition Rebreather Diver (75m) certification is assessed through a combination of theoretical exams and in-water performance evaluations. Divers must demonstrate advanced knowledge of rebreather physics and physiology, emergency procedures, decompression planning, and bailout strategies. Practical skills are assessed over a series of deep dives—typically to 75 metres—where divers must execute complex dive plans, manage rebreather systems under pressure, and respond to simulated failures. Instructors evaluate buoyancy control, situational awareness, and team communication throughout. Safety and precision are paramount at this level, and additional dives may be required if standards aren't met initially. Adventuro lists centres offering tailored training options for this intensive course.
Quick answers about this qualification. For anything else, use live chat or browse bookable activities below.
Find activitiesThis course trains experienced rebreather divers to conduct deep exploration dives down to 75 metres using closed circuit rebreathers (CCR). It covers advanced dive planning, decompression strategies, gas management, emergency protocols, and technical configuration. The course is designed for those pursuing deep wrecks, caves, or scientific missions requiring extended bottom times and precision.
You must already be a certified PSAI Technical Rebreather Diver or equivalent with documented experience. Divers should have a minimum of 100 logged rebreather dives, including at least 25 dives deeper than 50m. A solid understanding of decompression theory, equipment maintenance, and bailout procedures is required before starting the course.
Most training programmes run over 5 to 7 days, depending on the dive centre and local conditions. This typically includes classroom sessions, confined water skills practice, and a series of deep open water dives. Some centres may spread the training over multiple weekends. Check adventuro for detailed schedules at different locations.
You’ll need a fully functional closed circuit rebreather (CCR) approved for deep diving, bailout cylinders with appropriate gas mixes, dive computers capable of handling trimix and decompression schedules, and backup timers and gauges. A redundant breathing system and DSMB (delayed surface marker buoy) are also essential. Centres may provide rental gear or require you to bring your own.
You’ll learn how to execute deep decompression dives using trimix, manage complex bailout scenarios, troubleshoot rebreather malfunctions at depth, and refine team dive communication. You’ll also sharpen buoyancy control, loop management, and emergency ascent procedures. Precision and calm decision-making under pressure are central to this certification.
Yes. PSAI (Professional Scuba Association International) is a globally recognised technical diving agency. The Expedition Rebreather Diver certification is respected by dive operators and expedition leaders worldwide. It demonstrates a high level of competence in CCR diving and deep exploration, opening doors to advanced technical dives and projects.
This is a high-performance course, and mastery is essential for safety. If you need more time to develop your skills, instructors can schedule additional dives or theory sessions. Many centres offer flexible extension options for an additional fee. The goal is to ensure you're truly ready for 75m rebreather dives.
Absolutely. Adventuro partners with certified PSAI training centres across the UK and internationally. You can compare course dates, prices, and instructors’ experience on our platform, and book the course that suits your schedule and goals. Look for centres that offer expedition-level rebreather support and dive planning tools.
All deep technical diving carries inherent risk, particularly with rebreathers. This course is designed to mitigate those risks through rigorous training, equipment redundancy, and emergency planning. Divers are taught to handle failures at depth calmly and effectively. Only experienced and well-prepared divers should undertake this level of training.
