The AirFish is a fast ferry that will fly above the waves

The Ekranoplans, as they were called, relied on an aerodynamic effect called wing-in-ground (WIG) to avoid radar by flying just above the surface of the water. This phenomenon exploits an area of higher pressure created between the lower surface of the wing and the ground, reducing drag and giving the wing more lift. (It also explains why some planes coming into land appear to their pilots to “float” along when just above the runway.) While various military WIG craft have appeared over the years, they remain a rarity. That may change as a range of smaller versions, called AirFish, are launched as high-speed ferries.