Drug therapy is a reasonable choice if the passenger is going to remain a passenger or they represent a major client on a Perk Boat poised to order the next triple seven series commercial aircraft. NASA, the Navy and Air Force are investing a great deal in desensitization and you can apply these same principals on your own. When vexed the Liver upsets the stomach and the channel 6 pressure point reverses the disharmonic Chi. I can tell you, it seems to work and does so effectively. Ginger Ale as you may recall was often recommended by Mom when we felt sick and it seemed to help.
Science clearly demonstrates that it improves the nausea of morning sickness.
Candied or dry ginger being hot therefore is better used for a cold person, like someone that is chilled or a litter hypothermic. All of these notions are designed to take advantage of balancing your Chi as the Eastern traditionalist believe the Liver is in discordance with a confused sea but acts out on the stomach. The eastern vision of stomach and liver are not anatomical concepts but are rather as an energy sources. Don't watch, head down, in agonal anticipation as each wave strikes the hull nor go below decks to watch the dishes slide around. Try to maintain directional stability in a confused sea.