I'll bet you're all set to lay out the crew slot bug, but that isn't it.
I've got the crew slots, what I don't have are the bloody guns.
New career, RFB 2.0, Pearl, USS TARPON, 1941. First thing I did sitting at my desk was install air radar, upgrade the AA gun, and buy the big fore mounted deck gun. Started the patrol, read my orders, picked my start in harbor, and lo an behold my deck is a bare a a new born's butt.
No guns at all.
I'm guessing this is a known bug, and there's a save game hack to fix it?
TIA.