For those of us who aren’t great sailors, today’s invention allows complete freedom from the effects of water movement beneath a ship.
It is essentially one of those fairground rides in which a container is supported on a set of (very long travel) hydraulic rams.
This would be mounted on the deck, so that a set of sensors would gather data about the vessel’s accelerations and drive the rams so that the box would travel as if on horizontal rails.
This system might also speed its performance by learning to predict the seas’ movement for the next few milliseconds.
A small number of passengers could pay a hefty premium to travel across the world’s oceans without suffering seasickness.