I dont know if this has been posted before but I thought some might find it informative or might give it a try on their next cruise. There is no better place to test out a motion sickness theory than with cruise folks.
Im a fan of the show Mythbusters and one of the shows dealt with motion sickness. I watched the show a while back and its slipped from my memory for a while.
They tried over the counter stuff, magnetic wristbands etc and the only thing that seemed to offer some relief (without being zonked ie OTC stuff) was ginger pills. Description of said episode found here. http://kwc.org/mythbusters/2005/11/e...s_cures_f.html
Im going to try and remember so take some along next time even though it rarely bothers me any more.
Thought some might find it interesting.