Normoxic & Full Trimix Courses
Frequently promoted as the holy grail of scuba diving, tri-mix is often thought to be so horrifyingly complex that you must take 4-8 levels of training before you can use it. In reality mixing a tank of trimix is no more complex than mixing a tank of nitrox. The fact is, diving and helium were made for each other. Breathing high partial pressures of nitrogen is hard on the body. Replacing it with helium for even single-tank dives as shallow as 30 meters is reasonable and and what it in the 40-50 meter range is miraculous. You’ll remember your dives, perform better under stress and you feel better afterward. Of course, tri-mix is best known for its use on deep dives and Aquanauts’ courses can take you to any level you want to go.
TDI Tri-Mix Courses
Two courses are available from TDI:
ANDI Trimix Courses
ANDI’s Training Levels program includes two tri-mix courses:
- Intermediate Trimix Diver (60 meters)
- Trimix Diver (100 meters)
DSAT / PADI Trimix Courses
DSAT teams with PADI to offer an all-inclusive tri-mix course:
- Tec Trimix 65
- Tec Trimix Diver (75 meters)


