[Janos]

Digger,

I think you're picking the worng argument here. Think about it.

You have three divers, all breathing deco gas. One diver's deco gas fails. He then has the option of going for:

1) His backup reg
2) His own long hose
3) No.2's deco gas
4) No.3's deco gas

Even if you think he's a muppet and he can't reach his own long hose reg in it's clipped off position then he still has plenty of option.

The only time that your way makes sense is if:
1) He's a muppet and he suddenly and unexpectedly runs out of deco gas
2) His left post has rolled off
3) His buddies left post has also rolled off
4) His other buddies left post has also rolled off
5) None of them can reach their clipped off long hoses.

And all of this has happened without them becoming aware of the roll offs.

I don't think it's going to happen.

Janos