Quote: (Originally Posted by
andrespp)
My problem is that I have been in OC since 1979.....was taught by the military, and emergency ascendings from -30 meters in almost zero visibility waters was part of the routine training.
The big difference to wrap your mind around now you've gone closed circuit:
When OC, that last breath you exhaled all the way to the surface during the free swimming bail was from a known, safe gas. On Closed circuit it could have any one of a dozen problems, all of which could be potential killers.
Congrats on having the judgment to ask!