What is Scuba diving international?

Answer 1

Scuba Diving International (SDI) is a Scuba training and certification agency. It is the recreational arm of Technical Diving International, the world's largest technical diver training organization.SDI is the only diver training agency that requires students to have access to a modern dive computer on all dives during training from the very start. SDI is also unique amongst recreational diver training organisations in that it recognises solo diving as part of recreational diving, and offers a special training course relating to it.Every other major recreational diver training organisation mandates diving with a "buddy" at all times. SDI is a member of The World Recreational Scuba Training Council.