SDI was created in 1999 and grew out of the success of our sister company TDI, which specializes in the more advanced disciplines of dive training.Both students and instructors have embraced the no nonsense approach that the SDI training system offers. We have streamlined the course materials to let students study the essential academics with an emphasis on practical diving skills learned in both the pool and open water environments. SDI is the only agency to require students to be taught with modern dive computers from the onset of training.

Technical Diving International is the largest technical diving certification agency in the world. As one of the first agencies to provide training in mixed gas diving and rebreathers,TDI is seen as an innovator of new diving techniques and programs which previously were not available to the general public. Training with TDI has provided divers with the opportunity to see such wrecks as the Eric Giesse, Bengasi and the Haven. TDI divers have explored underwater caves in Spain, France and Mexico and assisted as support divers on world record freedives done in the Red Sea.