DeepBound
Contributor
The more polite of us don't go around mandating what is required. "usually doubles" leaves room for rebreather divers, sidemount, large single back tanks with stages, etc.jjones9527:Yeah, I would say doubles is mandatory. But thats just me.
I know you pretend not to see those other non-GUE options, but fortunately for the rest of us, you guys with your heads stuck down that hole can't mandate what other divers do.