The Soviets went big, culminating in the vast KM, a prototypical ten-engined, 500-plus tonne craft that was dubbed the Caspian Sea Monster. That crashed in 1980 but inspired the Lun-class ekranoplan.

Abstract: Sea surface height (SSH) is of great significance in oceanography and meteorology. Traditional physical altimetry methods based on delay–Doppler mapping (DDM) are subject to errors that are ...

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