I think that this is an old bug, but I noticed Japanese crewmen and civilians on board a Liberty Ship that I sunk south of the Phillippines. The Jap sailors were manning the bow deck gun. I should have taken a screenie, but I didn't.
Also, I've been playing on "very hard" with 90%+ realism (I like my camera views) and the planes are waaaaay too easy to shoot down. Looking forward to installing the supermods for 1.5.
I was happy to see that my first 4 German fish that I fired hit their targets at several thousand yards (I forgot to switch to Metric). I'm happy to see that I never lost my German TDC groove.