my wife had the misfortune to be landsick, after our 3rd day of cross channel trips - some in quite rough weather, sh was fine in the car as long as it was moving, but as soon as we stopped she felt queasy - took her 3 days after we got home to stop feeling queasy - now me - I only get seasick if its calm, usually if I get a whiff of diesel while boarding, give me rough and I'm fine.
Grendel