Since according to local pilots this area is the one most difficult routes of the dutch ports to manouvere big ships in (140m+) it would also be nice to have the Wadden area in the game, a real challenge to sail decently sized ships in a medium sized port! I found this chart on the web, with changing enviroments, ''walking'' sandbanks, the area is very challenging to sail in! For realism the max draught and size of ships should be 160m+ as the biggest ship ever handled was 160+m (4 tugs had to be called in), max draught in the port with hightide is around 9 meters and lowtide 6.1 meters.