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The PSAI Trimix Diver course blends rigorous academic understanding with precise in-water skills to prepare divers for safe exploration at technical depths. The course is typically delivered in modular format to allow for theory consolidation and progressive skill development.
Dives are typically conducted in progressively deeper environments, with one or more exceeding 60 m / 200 ft. Your instructor will tailor the training to local conditions—this may include quarry, ocean, or wreck settings. Assessment includes both a written exam and in-water performance evaluations.
This course demands focus, discipline, and good physical fitness. It’s not about pushing limits but extending them safely with the right training and mindset. Many adventuro centres offer follow-up coaching and advanced certifications if you’re keen to keep progressing.
Completing the PSAI Trimix Diver certification significantly expands your diving capabilities. You'll be qualified to plan and execute dives beyond 60 m / 200 ft using normoxic or hypoxic trimix blends, depending on the course level. This opens access to deeper wrecks, caves, and technical dive sites that are off-limits to recreational divers.
You’ll gain the knowledge and confidence to manage complex dive profiles, including accelerated decompression, multiple gas switches, and contingency planning for deep diving emergencies. This qualification is often a prerequisite for further PSAI certifications such as Advanced Trimix Diver or Advanced Cave Diver.
It also enables participation in expedition-level dives with technical dive teams or guided technical trips offered worldwide. Always remember to dive within your training and continue building experience gradually. Many centres on adventuro offer progression courses, mentorship dives, and equipment rental tailored to technical divers.
The PSAI Trimix Diver course typically takes 4–5 days to complete, depending on conditions and student progression. It includes intensive classroom theory sessions, confined water drills, and at least four open water dives using trimix. Centres may schedule this as a continuous course or spread it over several weekends.
The PSAI Trimix Diver course is assessed through a combination of theoretical exams and in-water skills evaluation. You'll need to demonstrate strong knowledge of advanced dive planning, gas management, and decompression theory, as well as precise buoyancy control, team communication, and emergency procedures while using helium-based trimix blends. Expect multiple deep dives (typically below 40 metres) under direct instructor supervision, with simulated failures and stage gas switches. Safety and precision are critical—your instructor will ensure you're fully prepared before certification is awarded. Centres may vary slightly in format, but most assessments are performance-based and conducted over several days. adventuro lists only trusted centres offering this rigorous and rewarding qualification.
Quick answers about this qualification. For anything else, use live chat or browse bookable activities below.
Find activitiesTrimix is a breathing gas blend of oxygen, nitrogen, and helium. It's used in deep diving to reduce the risks of narcosis (caused by nitrogen) and oxygen toxicity. Helium is non-narcotic and lowers the partial pressures of the other gases, making dives beyond recreational limits safer and more manageable. You'll learn how to plan and execute these dives safely on the PSAI Trimix Diver course.
The certification typically qualifies you to dive to depths of up to 75 metres (246 feet), depending on the exact course level (Normoxic or Full Trimix). These dives require careful gas planning and staged decompression, which you'll learn and practise during the course. Always dive within your training and experience limits, even with certification.
You must be an experienced technical diver. PSAI requires certifications such as Advanced Nitrox and Decompression Procedures, and most centres will expect a minimum number of logged dives, often including several staged decompression dives. Some centres may also require a deep diving certification. Check the specific requirements listed on adventuro for each training location.
The PSAI Trimix Diver course usually takes 4 to 6 days, depending on weather, conditions, and student progress. It includes classroom sessions, gas planning workshops, and multiple deep dives. It's intensive and demanding, so allow enough time to complete it without rushing. Some centres may build in extra days for additional dives or re-assessment if needed.
All deep technical diving carries inherent risks, but the PSAI Trimix Diver course is designed to manage them safely. You'll learn detailed planning, redundancy procedures, and emergency protocols. Instructors are highly trained and will not certify you unless you're fully competent. As with all diving, staying within your limits and maintaining equipment properly are essential for safety.
You’ll typically need a twinset or sidemount configuration, multiple stage/deco cylinders, a dive computer capable of trimix and decompression, and redundant systems (such as backup lights and regulators). Many centres offer rental equipment, but it’s best to train on gear you’re familiar with. Check gear requirements on each adventuro centre’s page before booking.
No, this is an expert-level technical course. You’ll need prior technical certifications, like Advanced Nitrox and Decompression Procedures, and significant experience with staged dives. If you're currently a recreational diver, consider progressing through those intermediate certifications first—many are available on adventuro.
Yes. Dive planning is a major part of the course. You'll learn to calculate gas mixes, plan decompression stops, manage reserves, and use dive planning software. The goal is for you to become a self-reliant diver capable of independently planning and executing safe trimix dives with a team.
Yes, PSAI (Professional Scuba Association International) is a globally recognised technical diving agency. Your Trimix Diver certification will be accepted by technical dive operators around the world. Be sure to present your certification card or digital proof when booking dives.
