Bad weather is the most significant hurdle here. The article references a few of the Soviet GEVs that were successfully developed, but it looks like they only o

Bad weather is the most significant hurdle here. The article references a few of the Soviet GEVs that were successfully developed, but it looks like they only operated regularly in the Caspian Sea and Black Sea (relatively calm water). Overall, major challenges to development are summarized pretty well here: https://en.wikipedia.org/wiki/Ground-effect_vehicle#Advantages_and_disadvantages https://en.wikipedia.org/wiki/Ground-effect_vehicle#Advantag... Sounds like one big step already taken is in low altitude altimeter development. These folks did a good study on radio altimeter integration in GEVs: https://www.sciencedirect.com/science/article/pii/S147466701533319X?via%3Dihub https://www.sciencedirect.com/science/article/pii/S147466701...