Sounds absolutely perfect idea for Eraknoplans. https://en.wikipedia.org/wiki/Ground_effect_vehicle https://en.wikipedia.org/wiki/Ground_effect_vehicle Typica

Sounds absolutely perfect idea for Eraknoplans. https://en.wikipedia.org/wiki/Ground_effect_vehicle https://en.wikipedia.org/wiki/Ground_effect_vehicle Typically these vehicles have 4X as much engine power for liftoff as they need for cruising. The reason is high water resistance and then very economical flight above the water body. Lift off being cancelled due to engine malfunction is less of a problem, as the "runway" is practically endless.