Lou gave great advice about staying near the middle of the ship, in both directions (up/down and front to back). If you have real problems with seasickness, like I do (Bonine, Dramamine, ginger, does not help at all), and still love cruising, ask your Dr for a prescription for the scopolamine patch. Make sure you put it on the morning of the sail date (takes a few hrs to get in your system), but guaranteed no problems. They are good for 4 days so will last through the cruise. Happy Sailing!