That's the question Miami startup Sea Cheetah plans to address, with a plan to develop hydrogen-fueled ocean-skimmers as well as a hydrogen generation, storage and fueling network in partnership with H3 Dynamics.

Wing-in-ground effect aircraft: Extreme efficiency and low cost

As we've seen with the fossil-fueled Airfish-8 and the battery-electric hydrofoiling Regent Viceroy Seaglider – not to mention Howard Hughes' enormous Spruce Goose "flying boat" and soviet-era ekranoplans – there are a couple of huge advantages to be found when you fly an aircraft at an extremely low altitude.