CAPTAIN SINBAD
Contributor
I understand that the DIR community considers anything below 100 feet to be Helium territory. PSAI is the other extreme with their "Narc Management" courses. TDI lies somewhere in the middle with 150 feet to be the limit for Decompression Procedures course. I just wanted to ask tec divers that if you were doing something that involves concentration such as DSLR photography (not the point and shoot but DSLR) or laying a reel etc. at what depth does Helium becomes necessary for you for such tasks?