Quote: (Originally Posted by
Dave Sutton)
"Commie" being slang for "Commercial Diver"
Nah, communist. Join the revolution comrade?
What you need to consider is the likelyhood of something going wrong and the ways to prevent it killing you. If you have a loop problem, or a manual valve sticking and your bailout and/or deco is plumbed into the loop, can you still breathe the gas for long enough to get back to the surface?
OC is easy as you have one reg per deco mix. If you start plumbing things into a switch block or BOV then you must also be able to use them if things go wrong.
If a full face mask is used then you must consider that you may have to dump the mask at some point and plan accordingly.
Apeks make a freeflow control device that is fitted between the second stage and the intermediate hose allowing a freeflowing second stage to be isolated simply. I have never used one of these, but if there was one that could be fitted to the first stage I could plumb deco into my Dolphin and be able to isolate SCR deco and go OC if I needed to, without running a Y valve.
At the moment all deco is done OC though.