Take bonine, or use the patch, or dramamine, and take it every day, whether you think you'll need it or not. Chances are you won't even know you're on a ship, but will feel like you're in a luxury hotel. I have no doubt that you'll have a great time aboard. The lovely Mrs. Jones (Vita) gets motion sickness very easily, and can't swim, but after the first cruise, she too was hooked. We've taken well over 100 total cruises since her first one. Just relax, and enjoy.