The dive profile you provided has a US navy profile embedded in it with both Air and Oxygen (O2) decompression. I assume it's from this incident: Four who died were not trained for Delta P - Trinidad and TobagoSorry, I don't quite understand what you mean with the O2.
Not sure what that US navy profile is supposed to represent, the "exceptional exposure time" doesn't match the diver that survived or the 4 that died. Maybe there was a theoretical rescue scenario at that point? I don't remember all the details from the incident.