I did manage to sink a merchant. Missed 2 times but my first torpedo hit dead center and teared the ship in half. (Around 1400km with eyeballed AOB.)
https://imgur.com/rchsv1x
In the KiUB manual it says the Bismark is 57 meters tall. Yet, in my identification booklet it says it has 55 mast height. I 'm starting to suspect that the guide might be misleading me due to a problem with the game itself.
Is there a patched ID booklet I ain't aware of?
Something is throwing off my range estimate and I am not sure if it is the manual I am using or the game.