Photo by Teemu Virtanen · CC BY-SA 3.0
OC Tech (55m)Generic
Extended Range (55m)
Last updated September 7, 2026
Extends technical diving to 55 m using normoxic trimix, adding a second decompression gas and longer no-mistakes runtimes to what’s taught in shallower technical courses.
No instructors or dive centres found offering this course.
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.