Diving agency
SDI
"The First Agency to Teach with Computers"
SDI is the recreational arm of TDI (Technical Diving International) and was the first major training agency to teach diving with dive computers from day one. Favoured by divers who want a more technical, no-nonsense approach.
1998
Founded
Maine, USA
HQ
Hundreds
Members
If you're considering technical diving in your future — twins, decompression, trimix — starting with SDI keeps you in the same family of agencies all the way through. Their recreational training is sharp, computer-driven, and treats students like serious divers from day one.
Key features
- First to teach with dive computers
- Direct path to TDI technical diving
- Rigorous, computer-focused approach
- Strong recreational + technical link