Majority of Chest compressions done outside of a healthcare setting are done without rescue breaths, In a hospital or EMS setting it is almost always done with a ventilator or breath mask so I don't even think rescue breaths need to stay in game. CPR is very simple to teach and learn, about 30 minutes as others have said, even less if rescue breaths don't need to be taught which is probably the case for lay NT employees. An IPC has no reason to not be able to do it, if it's capable of locating the proper position on the sternum and can push something 2 inches away from it, it would be capable of CPR. As for the 40% of crew acting like they can't operate a softsuit I think we need a wiki page explaining the bear minimum of crew training but that's for another suggestion.