[TorpX]

I considered that but I changed it because as far as realism is concerned, they could not say oh player is at 300 feet so charges will be set to explode at 290-315 feet and lay a pattern, they would have to set them at 300 feet. Like I said, the later charges could be set to 50, 100, 200, 300, 400, and 500.

I don't think you understand how the math works here. By using a low value for depth precision, you are not limiting enemy depth charge patterns. They AI will always "set" them at your depth. They will explode at your depth, whatever it is. By increasing the value, there will be some error, at least. Neither way is strictly realistic, but if you use a larger error, that will make the ashcans somewhat less effective, which is what you want after all.

About the AP value, I don't know if it would matter that much. It is already pretty low (12.0). However, I think the blast can still total your hull, even if the AP value is less than the hull armor value. It just has to use "brute force", that's all. With only have 35 hit points, I am surprised they work as well as they do. What do the torpedo warheads have, 200?