Trevally:

I just came back from Scapa. My realism setup is rather arcade, well I don't use manual targeting, I do have map contact update and I don't use event camera. All this switched to off makes 69% realism. I just want to enjoy the campaign, sinkings, views and immersion.
Anyway as I was approaching I was expecting sub nets and mines however I've encountered subnets only. Are there any specific places where mines were set (I do know it is a part of OH) ?
Secondly I've experienced two ctd's when I tried to attack destroyer. It was bit foggy, other destroyers were far away so I've decided to get rid of this one which was somehow around me all the time. When the torpedo was on its half way (approximately) the game just crashed. Tried second time with same result. Finally I did not attack and made my way in - no crash as well as no crash when I hit the warship (capital ship). I read something about ctd's around Scapa already so I'm gonna doublecheck that.
Apart from this everything's working fine, thanks Trevally for suggestions yesterday, I must have screwed up something and I think I already know what it was. I did everything right, but then I stupidly loaded the savegame after tutorial instead of starting new career and skipping the tut. Now I'm finally enjoying Open Horizons and what a piece of work again. You know before I actually didn't even have the buoys in the game so no wonder that the campaign went wrong as well, it was totally screwed. Now everything seems to be all right, Graf Zeppelin (is it) at Kiel in the beginning of the war, Baltic mission (didn't have that at all before) and the entire traffic is completely overhauled I can see that. Hunting ships is much more entertaining now, but still not the easiest thing in the world. On my way back from Scapa I found my first convoy which I couldn't find any before.
Thanks a lot, all of you.