Was this a military target?
 

Attachment 4973

I was on my FIRST patrol and I came up with this. Not escorted by a destroyer, just paired with a merchant.
It was over 10000 tons so I didn't want to leave it go.
This ship took 5 of my torpedoes to sink, I couldn't believe that it was still afloat.

To be honest, it couldn't be a passenger ship if it had ton of AA guns for some reason.

In FotRSU, that is a troopship that they haven't gotten the paint brush after just yet, hence all of the AA guns. Technically speaking, they probably would not have had that many early in the war. The ship used to take eight to ten torpedoes to sink, but she is a big, partitioned target with lots of water-tighness, so we left her somewhat tough to take out.

If it was Japanese and NOT marked as a hospital ship it was fair game.