I Sank 2 ships but game doesn't say so.

[Sailor Steve]

Originally Posted by Flegmatica

There were same ships at same location. (Hello dynamic campaign?).

Everything has to be written into one of the campaign layers. Take a look at the Mission Editor to see just how much work is actually involved before you criticize. All convoys are part of the Random layer. They follow the same routes but the size and composition of the convoy is randomized.

The Harbor traffic (which you encounter if you raid a harbor - something, by the way, that was only done twice during the entire war) has to scripted in, one ship at a time. It will vary just a little as some ships are written to change, but even that is mostly in friendly ports. That layer of the campaign is not dynamic, nor was it ever meant to be. In the stock game there are no ships in any enemy ports.