Birthday of Reg
First demand valve ever was invented in the mid 19 century! However, modern demand valve appeared almost 100 years later - in 1942 (Cousteau, Gagnan). read more about first reg ever in our diving knowledge database #divingfacts #factoftheday #divingscience #divinggear
Greetings to a new TDI Instructor
Mahmoud Askar has received his Advanced Nitrox TDI Instructor level. Congrats! So welcome everybody for next courses: - Intro to Tec TDI - Adv.Nitrox TDI #tdi #twinset #instructortraining #levelup #certification
