The damage texture applied when a shell from a ship hits the hull is the wrong one, it's very ugly :
To solve this, open
NCA_Tuscaloosa.val, and in VisualDamage node, replace
Expl_mask05.tga by
Expl_mask01_a.tga (for the MaskTextureName).
At least for me who doesn't have this
Expl_mask05.tga in my files.