Oh don't worry, they sunk anyways. And I don't believe Corvettes are supposed to sink every time they stop for a hydrophone check in rougher seas... (though I doubt they'd actually be doing hydrophone checks in seas like that to start with - hey, that's reality vs. game for you)
I already sent Beery the correction. Call it an unsuccessful experiment - these things happen when you have so many different things that could potentially be wrong in the game.