Motion Sickness

I suffer badly with sea sickness. I've tried every technique going and nothing works. I know a couple of other people who I suspect are autistic but haven't been formally diagnosed, and they are exactly the same.

Just curious to know whether others on here are the same, and also equally interested to hear from people on the spectrum for whom it's not a problem.

Any techniques / remedies welcome, (though I've probably tried it :) ).