Hi,
That's great then,
I have some more for Rotterdam
Please Ignore the Blue dots, they are representing pictures. The following co-ordinates are for the buoy closest to the red ship.
51° 58 05.55" N
4° 06' 26.00" E
Near the Bulk Terminal which is In-Game (The Large Most Western Spawnpoint in Rotterdam). Picture as Follows.
As you can see from the Google Earth picture, there are two more buoys. The one in the middle of the group is situated at
51° 58' 08.13" N
4° 06' 23.05" E
And the Most Western buoy is
51° 58' 08.40" N
4° 06' 17.41" E
I hope this is some help to you. (Berge Stahl Picture belongs to me)