Why We Switched from PADI to SDI/TDI — After 15 Years
Let me start by saying this is not a hit piece.
Author: Jonathan Venn
SDI/TDI Instructor Trainer and Dive Shop Owner at Blue Ribbon Dive Resort, Mabini, Batangas. "The sea, once it casts its spell, holds one in its net of wonder forever." — Jacques Cousteau