I looked at the zon setup and remember doing it now.
It was a side project to help VonDos while We were finishing up GWX 3.
I also recall it was not as good as it could be given the proper attention.
Now that means there are some areas that a torpedo could possibly hit that would cause no damages at all.
I'll have to install it and do a few test shots on the areas I saw today to be sure.
I don't use S3D for zone work by the way.