TDI is the largest technical certification agency in the world. Since 1994, TDI has been 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.

TDI’s professionals are held to the highest standard to ensure quality training throughout the world. This means that as a diver taking a TDI course, your instructor will have documented his experience and knowledge prior to achieving that rating. As an instructor candidate taking a TDI course, your TDI instructor trainer will have gone through the paces to achieve the highest level of training that TDI offers.

TDI is committed to offering the highest quality training supported by the latest materials with the most up to date information and techniques. TDI’s materials are written by authors that acutely conduct the type of diving they are writing about. Those same materials are updated as technology and equipment change.

Photo by Damien Siviero

Photo by Damien Siviero

St George Underwater Centre are proud to be a TDI training facility and offer the following courses for all level of technical divers:

•Open Circuit Courses ◦Intro to Tech Diving ◦Nitrox Diver ◦Advanced Nitrox Diver ◦Decompression Procedures Diver ◦Extended Range Diver ◦Sidemount Diver

Overhead Environment Courses ◦Advanced Wreck Diver

•Rebreather Courses ◦Rebreather Discovery ◦Air Diluent Closed Circuit Rebreather Diver ◦Basic Air Diluent Decompression Rebreather Diver ◦Air Diluent Closed Circuit Rebreather Diver, Unit Specific- Discovery Poseidon MKVI ◦Mixed Gas Closed Circuit Rebreather Diver

Photo by Damien Siviero

Photo by Damien Siviero

Interested in cavern and caves? Want to learn more? Contact our team for more information!


If you would like any further details or to book on to a course please fill in the form below.

Jervis Bay Double Boat Dive

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