@neuspadrin: I didn't see anything like this, but it's OK. We'll all ignore it, don't we?
@kadri: thank you! OH YES, there are indeed some flicker problems. I tried everything I read about avoiding flicker, but using a fill light setup for example looked quite good, but destroyed the translucency on the sails as well as reducing GI relative detail to 1. I'll take care of the flicker problem later.
@FrankB: thank you too. LOL
! You'll get your tasty cookie as soon as possible. Render times are really really high. As I said above I have to use GI. Besides there's a thin animated cloud layer directly on top of the water surface on the coastline and around the ship to simulate spray (you'll see it later animated), and I have to switch ray trace shadows on to make the ship cast shadows onto the spray.
At the time I have disabled the plants. I think this will raise render times even more!
Another image of the ship with the "spray cloud layer":