Why does it take so many torpedo's

Originally Posted by Rob Jacobsen

I usually set my torpedo depth to match the ship's listed draft and use magnetic exploders. That does much more damage than hitting the side of the hull.

Thank you for replying. I have been told that there is a book(somewhere in the SH5 sim) that shows the draft of each type of ship,but for the life of me I could never find it.

I had set my torpedos as magnetic exploders & varying depths.