Back in the '50s we were shown the sonar room of a destroyer (sonar school project). The Chief said "Put you ear to that bulkhead and tell me what you hear." DOH! I said "The ocean". (We were underway at the time.) He slapped the bulkhead and said "There's 3/8" steel between you and the Atlantic, you're three decks and five hatched between you and topside and you're located at "Torpedo Junction" (under the bridge). Kiss your ass goodbye if you're ever hit."
I told him I was in the submarines. He said "You're crazy."
lol