I'm not sure which of all the potential scenarios they could be in are the worst.

Floating on the surface, seeing the hope of survival through the window whilst being able to do nothing about it; trapped on the ocean floor being able to see nothing but each breath; or the sinister creaking that forewarns sudden breach and implosion.

I'm just going to tell myself they've all turned pirate and made for the Carribbean. No tragedy here! No sireeee.