Make sure you are on a deck above water. I recently went on a cruise and stayed on the deck just above the restaraunts. I am the queen of sea sickness!! I never had a problem!! I noticed that I got a bit sea-sick disembarking at the ports; but it was because we went through the lower decks at times to do such. I did note....(I had an inner room)....when I saw the people across the hallway's room (waterview)........I knew I would get sick!!