Scuba Diving International (SDI)

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. SDI course materials are state-of-the-art; the materials are lavishly illustrated with photography and graphics. Diving is constantly changing. SDI staff is always looking forward and striving to be the innovators in scuba diving education. SDI focus is to make the experience of diving one that is enjoyed by every family member. SDI staff are all active divers; and want to share the love of the sport.

Scuba Courses
Dave Taylor
+44 (0)7977 501183

Ten Reason why you should teach with SDI/TDI

Instructor Cross Overs available with Deep Tech contact Dave for more details on 07977 501183



To start your online training simply choose one of the online courses listed below, you will receive by email an online code within 24hrs. Simply click on the online training logo or type into your internet browser.

On the lefthand side of the page in the box Sign-Up Now simply enter or code to begin your online training.

SDI Online

Online Training

Why sit in a stuffy class room when yon can learn from home with Scuba Diving Internationals new easy to use elearning programs. Through Deeptech you can do all your learning at home for some of our selected course before completing the dive with one of our instructors, this allows you the to complete the learning at your own pace and in the comfort of your own home.



Open Water


Open Wateronline theory £50  



Deep Tech offers a number of SDI specialty courses. The SDI specialty courses online : £50

Deep diver £50  
underwater Navigation £50  
Underwater Wreck £50  
Computer Nitrox

Dive master

This program is designed to develop the skills & knowledge necessary for an individual to lead certified divers in the open water environment. Dives up to a maximum depth of 40 metres Qualifications of Graduates

Dive Master Online Theory Coming Soon


Assistant Instructor



Coming Soon




Coming Soon



Website and artistic design Brian Ingle Photos Brian Ingle , Guy Wallis and Dave Taylor