We live within a couple of miles from the ferry crossing between Newcastle (actually at North Shields) and Amsterdam (actually at IJmuiden).
I've written about this before. As last time Bill was rather seasick, we splashed out (sorry) on an outside cabin with a window, in hopes that it might help a bit. It may have.
Then again, perhaps bringing our own room picnic instead of eating at the buffet - and trying to get our money's worth - may also have played a part in the happier morning.
We learned a lot from our previous experience and the roads out of Amsterdam seemed far less intimidating as we headed for Chalons-en-Champagne (click on link for map).