For what it's worth:
https://pigboats.com/index.php?title..._Mark_9_Mod_1B
I'm sure you folks have this already down-packed when it comes to getting and finding references, but I figured "why not" when I ran across this when trying to fix some BuPers issues I'm having.
It was more of a "rabbit hole" thing when I was trying to find info on the S-Class. I'm trying to update the thing's "upc" file and I'm also trying to update some of the weapon stuff, but "upc" files in general, unfortunately, have been driving me crazy this weekend.
I thought it may help if you were thinking of any weapons updates such as adding the older Mk9 Mod1B as an option in the Asiatic Fleet or Alaska either early in the war or in pre-war stuff.
ElCid97