I dont really think it does this case justice to oversimplify things, but cave divers talk triple or quad. redundancy. I could say that keeping more back gas on hand, or not staging tanks (something ocean divers in my realm seldom do because you never know where the current will take you) would have saved this guy.
"Right from the start , things went strangely. Parker appeared distracted, and was not feeling well. Most of the more experienced WKPP divers were all sick and in street clothes, so could not dive and were running the surface, so I offered to do the dive in Parker's place. Parker said, "Don't you think that would be a bit much to bite off right now?". His stages were not all the way full, and he had a 3x Tekna scooter (Gavin had a Gavin). I offered my full bottles and more powerful scooter. He said, "No, it's too late"."
With respect, this doesnt sound like smart diving. If you feel sick, if your tanks are not full, if your scooter isnt as powerful, and if you turn down an offer for better items... Well damn you know my point I wont beat it to death.
Shockingly it almost seems from this description that the man was depressed and apathetic about his safety. I hate to say such a thing not being inside his mind, and to say that about a person who died, but jeez he was doing some serious work. Youd think he would have taken the gear requirements very seriously.
I didn't oversimplify things. You asked for an example/evidence of a diver who did everything by the book.
I gave it to you.
GI3's observations and Bill Gavins first hand account are supplied as evidence.
If you can find fault with Parker Turner....then you are a better diver than anyone I know.