You may have heard of the Soviet Lun-class Ekranoplan, the infamous Caspian Sea Monster, but have you ever heard of the western counterpart? Introducing, the abandoned project:

PAR-WIG Ekranoplan

The soviets terrified the west with a new kind of weapon, a Wing-In-Ground effect aircraft that could carry anti-ship missiles or heavy cargos as fast as an ordinary jet airplanes but can carry more payload than airplanes.

US doesnt want to be left behind so they design their own version of the ekranoplan. But instead of launching anti-ship missiles like the soviets did, this one launches 4 Trident Sea-Launched-Ballistic-Missile as part of a strategic deterrent.

Unfortunately, the project was abandoned because it suffered similar problem like the Caspian Sea Monster had. Mainly because US doesnt need one. While impressive, really serve no military purpose and doesnt provide major military advantage for the US Armed Forces to possess.

Aside from the internal Great Lakes, there are no major bodies of water within the United States of America where such a craft could be readily employed and no need to position strategic or tactical assets there. Both the Atlantic and Pacific oceans are covered by the US Navy with the form of carrier battle groups and submarine fleets, which provide portable power projection for undersea, surface and air operations virtually anywhere around the globe.

And of course, there's other problems like saltwater damaging the engines, waves damaging the hull, poor maneuvering, etc

further explanation is discussed in this video

controls

controls are the same like normal airplanes
Trim: gyro pitch
AG1-4: launch trident missiles
AG5: open launch hatch

screenshots