open circuit
Tec 40
First level of TDI-style tiered technical training, introducing minor staged decompression on nitrox to around 40 m — the entry point into the Tec 40/45/50 progression.
First level of TDI-style tiered technical training, introducing minor staged decompression on nitrox to around 40 m — the entry point into the Tec 40/45/50 progression.
First level of TDI-style tiered technical training, introducing minor staged decompression on nitrox to around 40 m — the entry point into the Tec 40/45/50 progression.