They didn't have to pick them up. They could have surfaced (remember, it was KNOWN that there was no threat) and tossed out a few inflatable life rafts.
> They could have surfaced (remember, it was KNOWN that there was no threat)
It was by no means "KNOWN" that there was no threat. A modern submarine is inherently in a much more unsafe posture when surfaced, which is precisely why they never do that, especially when it's possible to encounter an enemy.
> tossed out a few inflatable life rafts.
Why do you think submarines randomly carry inflatable life rafts? If they had enough space for those they'd toss them overboard and load additional food stores instead.
Moreover, a surfaced submarine close enough to a floating group of survivors is actually dangerous to those survivors. It has a rotating screw at the back which can seriously injure or kill people and it's not like there's a deck trebuchet equipped to lob life rafts at a distance, even if it carried them.
> Legally, there's much here that's hard to pin down, massive grey areas and a lot of jelly to nail to the wall.
Similar to an earlier comment you made to me, what references do you have that say that GCII Article 18 is 100% not applicable to submarines? Or more broadly that support your assertion that "you've departed any recognizable modern law of naval warfare."
It was by no means "KNOWN" that there was no threat. A modern submarine is inherently in a much more unsafe posture when surfaced, which is precisely why they never do that, especially when it's possible to encounter an enemy.
> tossed out a few inflatable life rafts.
Why do you think submarines randomly carry inflatable life rafts? If they had enough space for those they'd toss them overboard and load additional food stores instead.
Moreover, a surfaced submarine close enough to a floating group of survivors is actually dangerous to those survivors. It has a rotating screw at the back which can seriously injure or kill people and it's not like there's a deck trebuchet equipped to lob life rafts at a distance, even if it carried them.