According to Mark Wade's astronautix site, this was conceived circa 1961 by TsKB-17 in Leningrad to launch Beriev P-100 intercontinental attack/reconnaisance cruise missile(s). (However, according to russianspaceweb, P-100 originated from OKB-49, while Beriev designed the smaller P-10. Confusing.) Would anyone have more info. on and/or drawings of this "boat," which actually seems to have been a large surface ship? P-100 missile weighed 14 tonnes, but am primarily interested in the platform, not the weapon to be carried thereon.