Picture this: You lift off and fly in
Ground Effect to some distant place. All is good. When you get to that place..the seas are higher than lets say 2 feet..(A Stretch) everywhere around your destination. This IS A SEA Plane when it comes to landing. Seaplanes DO NOT land in Rough Seas..PERIOD..In spite of what the web site says.
SO you are Stranded ABOVE the water and CAN'T land. OK: Just fly back to where you came from and hope the seas are a little flatter back there.
This vehicle CAN NOT get OUT of Ground Effect to attain a higher altitude to clear higher objects. The wings are purposely designed TOO Short... SO we don't have to meet Airplane (FAA) regulations.. SO: this vehicle can not save itself by actually Flying above obsticles to get to a safe landing. If this vehicle COULD get out of Ground Effect.....It would be classified as...OMG: An Airplane...and have to meet FAA Regs.
NB
Definition: Ground Effect is about the length of the winspan of the Aircraft.....
This concept IS used in some places for commercial transportation...but in sheltered waters. NB