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.


TDI is the largest technical 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.

At NorthWest Dive Shop we offer the full range of SDI/TDI courses,

Advanced Buoyancy Diver
Advanced Adventure Diver
Advanced Scuba Diver
Altitude Diver
Boat Diver
Computer Diver
CPR1st Administrator
CPROX Administrator
CPROX1st AED Administrator
Deep Diver
Propulsion Vehice Diver
Drift Diver
Dry Suit Diver
Master Scuba Diver
Open Water Scuba Diver
Rescur Diver
SDI Full Face Mask Diver
SDI Sidemount Diver
Search & Recovery Diver
Solo Diver
Wreck Diver
Nitrox Diver
Advanced Nitrox Diver
Decompression Procedures
Assistant Instructor

To find out more about SDT/TDI contact us or check out the STI/TDI website:

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