Patrick and Adel did not have proper safety because of their own failure - no supervision in case of Patrick, and released lanyard at depth in case of Adel. It is hard to tell it, but they violated the very basic rules of safety and that cost their life.
Passing out on the way back during a competition or a record attempt is nothing unusual, and is not unsafe, as long as you have a trained buddy who knows what to do.
Passing out on the way back during a competition or a record attempt is nothing unusual, and is not unsafe, as long as you have a trained buddy who knows what to do.