What AI says about TDI/SDI

SDI/TDI/ERDI/PFI is an international diving training organization offering scuba, technical, freediving, and public-safety diving courses, including eLearning options. Training is delivered through a global network of affiliated dive centers and instructors, with certification cards and instructor certifications available. Under the One Dive Family umbrella, the brands provide safety-focused training, certification, and community resources such as blogs and a mobile app.