I think there are some more issues I don't get along with yet.
At first is a correct speed estimation. I took my Latitude reading at 00:00h and set course 0° from there on. I tried to calculate the kilometers which I would travel in the next 24 hours, so I watched the speed gauge carfully and it was almost permanently at 10.1 knots (7km/h wind speed).
But when I took the next Latitude reading after 24 hours I hadn't travelled my calculated 428km but ~450km. This would have made an average speed of 10.9knots.
If you watch the speed gauge in 1x TC the average speed seems at least 0.5kn less than if you watch it at 256x TC. This is still a little bit strange. The error should be even bigger at higher speeds and with higher wind speeds too.
The other thing: I don't know if that occured before but the navigation officer doesn't report the correct weather all the time. In the worst case he didn't recognize any rain for days while it came washing down on me the whole time.
Despite that everything is working fine. I still didn't encounter ANY other vessel than the destroyer which let us out of St.Nazaire at the beginning of the patrol, but at least that makes the navigation easier when not interrupted by some convoy attacks or something
