Another macabre aspect of this tragedy is the ubiquitous (in the press, at least) of the question "can the bodies be recovered?" There are unlikely to be any "bodies", as such. The pressure at that depth is about 6,000 psi. The implosion "blast pressure" would be coming inward rather than outward (as in an explosion from HE), but would be many times greater than an HE explosion due to the water pressure and the fact that water is many times more dense that air/gas in an explosive pressure wave. My feeling is that one might find a piece of flesh, a shard of bone, etc. here and there. From a document (
Effects of blast pressure on structures and the human body) there's the following quote: "A 35-45 psi overpressure may cause 1% fatalities, and 55 to 65 psi overpressure may cause 99% fatalities. (Glasstone and Dolan, 1977; TM 5-1300, 1990.)" Imagine a "blast" pressure 100 times more powerful than this (and traveling within a medium of much greater density: water) and you can realize that there
probably won't be any intact anything with regard to the human body. I could be wrong, but I don't think so. All I can say is: RIP, gentlemen. You were more brave than I would ever be.