The Caspian Sea Monster, officially «KM» (Korabl Maket, Russian - Корабль-макет Naval Prototype), also known as the "Kaspian Monster", was an experimental ekranoplan, developed at the design bureau of Rostislav Alexeyev.
The KM was designed in 1964 -- 1965, and was unique in size and payload. The first spy photographs from American spy satellites showed a strange aircraft carrying letters "KM" on its fuselage. CIA disambiguated it as "Kaspian Monster", while it act
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