[CaptainMattJ.]

well i was thinking at maybe a couple meters below the waterline type of sot. But really i was asking more about the effect of flooding.

but say you DID make a keel shot, and the entire engine Deck/Space/whatever was flooded.

But, lets say this wasnt enough. Youd then have to fire another torpedo or beat it up with your deck gun. BUT, say a torpedo fired higher up slammed into a deck that was slightly below the waterline. Now what i was thinking that would contribute to more effective flooding was 3 things

1) that the suction created by the fact that the hole was half-half in terms of the waterline, and that the suction created by that kind of hole when it was very close to being engulfed in water would make flooding faster, leaving less time for the crew to react.

2) with less time, the deck members would have less time and a greater risk of isolation from the water spilling in to that one deck and then going down through the decks /engine space to close of a theoretically "seal-able" deck.

3) IF the flooding of roughly most of the decks at/below the hole werent enough to sink it, it was drag the ship down to the point where the deck and/or decks below it would flood because they were then underwater after being dragged down.

But you DID shine some light.. I didnt take into account the fact that the shockwave from the torpedo alone would being enough to rupture the relatively thin in comparison bulkheads.