Technical Diving International (TDI) is the largest technical diving certification agency in the world. TDI specializes in more advanced Scuba diving techniques, such as diving with rebreathers and mixed breathing gases, such as Heliox.
TDI was started after a disagreement between directors caused a split away from International Association of Nitrox and Technical Divers (IANTD) in 1994.
In 1999, Technical Diving International started a sister organization called SCUBA Diving International, which focuses on the recreational end of Scuba diving.
TDI Open Circuit Courses
TDI Rebreather Courses
- Semi-Closed Rebreather Diver (Dolphin, Ray, Submatix ST100, Azmuth)
- Inspiration / Evolution Air Diluent Closed-Closed Rebreather (CCR) Diver
- Inspiration / Evolution Mixed Gas Diluent CCR Diver
- Inspiration / Evolution Advanced Mixed Gas Diluent CCR Diver
- KISS Air Diluent CCR Diver
- KISS Mixed Gas Diluent CCR Diver
- Optima Air Diluent CCR Diver
- Optima Mixed Gas Diluent CCR Diver
- Optima Advanced Mixed Gas Diluent CCR Diver
TDI Overhead Environment Courses
TDI Service Courses
- Nitrox Gas Blender
- Advanced Gas Blender
- O2 Service Technician
TDI Leadership Courses
- Technical Diving Divemaster
- Technical Diving Instructor
- Technical Diving Instructor-Trainer
Technical Diving International