The sky had that special 17th century painters quality for which holland is famous.
If you liked you could make a fly over with an old dakota. At home I saw that the propellors stood still but afterwards it seems that a shutter time of 1/4000 is enough to stop them.
Yes everything that could float was floating . Shot taken from the ferry, normally a 5 min trip with a waiting time of 7 min, but now more then 1½ hour waiting and crossing. One for skywatch friday here.