your dealing with surface units which are playable. something that SH3 never really was designed for... therefore it is a far out modification and as such it will not respond in any historical sense.
It might have taken a hundred 15 inch shells to sink that BB in real life... or - as in the case of the hood, it only took one or two well placed shots to obliterate her.
you never know.
In short... with playable surface ships, you are toying with forces which are not fully understood by SH3's engine... its likley to do some wierd stuff. and nothing that happens can be taken seriously with such a mod.
If you are really after some fun surface unit fighting with long drawn out hour long exchanges of massive shells i recommend SH4 with the USS Iowa mod. or perhaps the Bismark Mod etc.
much more engaging as some of those tubs can take hundreds of hits
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