
I think the government already raised the speedlimit.... don't remember there being a good reason for it except maybe fuel economy was no longer a concern (thinking that is why it was lowered) and people were all exceeding 55 mph anyway (pretty much the same issue)

yes I understand.... but completely not my point....
If I as a NAUI Cave1 diver have by my standards access to 1/3 of my breathing gas for penetration (whether or not I use the full 1/3 of it) Then why are equivalent certifications limited to 1/6 of their available breathing gas??
And don't even start on progressive penetration.... I can do two nav decissions and BY CHOICE have ever only done one on a given dive because I'm NOT READY to do two.... If I can be an adult about progressive learning POST certification... so can everyone else...