About Q1, when you are playing american campaign, and looking thru periscope from an american sub, you can see on the left there a window where you see how is your sub positioned against the target, and, a little below on the same window you can switch to torpeodoes speed and how deep they will travel. On the u-boat I have to switch to attack map first and and after I can set the speed and how deep they will travel (it's much more simple with american version).
Q2: Oky then I will try to sink biggest ships
Q3: It is random or after a specified rank?
Q4: I searched a lot for them but I rly couldn't find any. Is there a specific place where they can be found?
Ty a lot for the answers
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