> Otherwise the U.S. committed several more war crimes for each of the other Iranian navy ships that were sunk by bombs or cruise missiles rather than by submarine-launched torpedoes.

I am having difficulty parsing your reasoning here. What matters is were "all possible measures taken to search for and collect the shipwrecked", not the manner of the attack. You may be implying that bombs/cruise missiles left no possibilities but that isn't a certainty if there were US ships in the vicinity.

Regarding your provided reference to it being "difficult" for submarines to collect shipwrecked survivors - the treatment seems cursory and more germane to conflicts where there is more parity. In this situation what was the risk to the submarine? Exposing it's positions to the Iranians who had not other ships in the area (and per US assertions no other Navy at all)? Coming under attack from a missile launched from Iran while surfaced?