all ships have wonderful stabalizers.
If your ships should encounter rough waters or a storm your Captain will find a safer course to take. Your safety is his main concern.
If you are not prone to motion sickness when you fly or drive, chances are you will not have any problems while aboard, but just to be on the safe side, pack the Bonine as a back-up plan.
If you get moderate to severe motion sickness when you fly or drive it might be worth your while to ask your doctor about a prescription for the patch.