We hit a large cargo ship with 2 fish, calm seas, magnetic fuses. Two loud explosions on target bearing and the ship foundered almost immeditaely. A short time later, my weapons officers claims she's a goner, then... ...nothing. She sat there, decks awash for almost 24 hours!!
Her crew abandoned her, and she bobbed about in over 1000 meters of open ocean!
It wasn't until we picked up a couple of her crewmen that we found out she was filled to the rails with timber!
No way she was going under without wasting a couple for eels on her.