SCU5
Contributor
Here's what George Irvine has said in the past regarding stages when cave diving, not sure what he says about open water diving. Got from the Direxplorers website:
I also would not do a no flow dive even in shallow water over reasonable swimming distance with only one scooter, and as anyone who ever dove with me can tell you, I do not use my backgas at all - I always use stages - even where it takes only a part of stage to do the dive as in many Mexico caves. I don’t trust any scooter, to tell you the absolute truth, or any other piece of gear by itself.
I also would not do a no flow dive even in shallow water over reasonable swimming distance with only one scooter, and as anyone who ever dove with me can tell you, I do not use my backgas at all - I always use stages - even where it takes only a part of stage to do the dive as in many Mexico caves. I don’t trust any scooter, to tell you the absolute truth, or any other piece of gear by itself.