Quote: (Originally Posted by
Divechick)
What is the best technique for bringing an unconscious Rebreather diver up from depth? Do the skills that were taught for OC still apply? Presumably, in addition to controlling the usual sources of buoyancy - wing, drysuit - lifting an RB diver would entail controlling an additional source of buoyancy - the loop/counterlungs - and also potentially monitoring and maintaining PP02. Is it necessary to teach a specialized technique for rebreathers?
Interested in anyone's thoughts.
Having actual done this, I would like to add some comments...
Remember that the diver passed out most probably from breathing the loop. And it could be hypoxic (among other possibilities). So bring him up while keeping him on the same loop probably won't help to revive him with the PO2 dropping by ascending.
However, it could be a lot more dangerous to try to switch mouthpiece.
If he has a BOV, switch BOV to OC could help adding fresh gas
IF the gas supply is adequate (i.e. shallow depth, connected to large off-board source, etc).
If the gas source is limited and it is possible to run out of supply before reaching the surface - or you simply can't work out the gas source, keep him on the loop and check the PO2 display. Add O2 as needed.
If you can't do all 5 things at once, simply add O2 periodically and slowly as you ascend should keep to maintain the loop breathable if it was on bottom.
Remember to look out for your own PO2 handset as well.