Re: rock you to sleep...
I took a short hop in Maui out to the little atoll of Molokini for a captive dive. I was basically seasick the whole way, but avoided the worst of it by virtue of sitting on the bow in the wind and spray. Arrived back at the dock soaked to the skin, but in pretty good shape.
Others weren't so lucky, and many fish were fed. The crew passed out a cocktail of 7-Up with ground ginger bits in it.
I took a ferry across the English Channel with no ill effects, but was fortunate to have one of those rare "sea like glass" days.
I am not a "rocking boat" person. Or a "small plane" person.