Photo by Teemu Virtanen · CC BY-SA 3.0
Expedition Trimix
This expedition-level open-circuit certification qualifies Trimix Divers with extraordinary experience to conduct extremely deep technical dives at depths of 300–400 fsw (90–120 msw) and beyond, requiring extended decompression profiles and custom helium-based gas mixtures. You'll master extreme hyperbaric narcosis management, complex multi-stage gas deployment at extreme depth, extended surface decompression, and expedition-level dive planning for record-class attempts. Expedition Trimix Diver enables participation in the world's deepest open-water technical diving expeditions and represents the apex of technical diving achievement.
Prerequisites
IANTD Trimix Diver (or equivalent); minimum 300 total logged dives including minimum 100 trimix dives; age 21+. No specific "dives in the last year" requirement stated, but continuous active technical diving experience is expected.
Standards
What a diver must demonstrate to pass this course — not always published by the certifying agency.
Divers must demonstrate mastery of extreme-depth decompression procedures, multi-stage gas management at extreme depth, hyperbaric narcosis management, and expedition-level emergency planning and communication.
Instructors Teaching This Course
Thailand
Dive Centres Offering This Course
Thailand
We're still building out the directory country by country, so this list isn't every instructor or dive centre teaching it in the world — more locations are coming soon.
Common questions about IANTD Expedition Trimix
What are the prerequisites for IANTD Expedition Trimix?
IANTD's standards require: IANTD Trimix Diver (or equivalent); minimum 300 total logged dives including minimum 100 trimix dives; age 21+. No specific "dives in the last year" requirement stated, but continuous active technical diving experience is expected.
What is the minimum age for IANTD Expedition Trimix?
IANTD's standards state: Age 21+.
How many dives do I need before starting IANTD Expedition Trimix?
IANTD's standards state: Minimum 300 total logged dives including minimum 100 trimix dives.
What does IANTD Expedition Trimix training involve?
According to IANTD's published standards: Divers must demonstrate mastery of extreme-depth decompression procedures, multi-stage gas management at extreme depth, hyperbaric narcosis management, and expedition-level emergency planning and communication.
Where can I take IANTD Expedition Trimix?
1 dive centre and 1 instructor in the TecDiveTools directory teach IANTD Expedition Trimix, in Thailand. Each is listed further up this page.