R-39 RIF / SS-N-20 “STURGEON”
In 1983 the USSR put into service the R-39 Rif or SS-N-20 Sturgeon SLBM missile according to the NATO designation. It was the first Soviet type SLBM missile with solid-fuel propulsion armed with a warhead composed of MIRVs, (multiple independent targeting reentry vehicle), with ability to attack independent targets. Its development began in 1971, but after problems with the solid-fuel boost engines, test flights did not arrive until 1980, resulting in four of them failed and two successful. The SS-N-20 was the main armament of the Typhoon class submarines and a test submarine from the Golf V class. 120 missiles were built, which together had 1,200 MIRVs warheads of between 100 and 200kt each. In 2004 they withdrew from service along with almost all Typhoon submarines.
R-39 / SS-N-20 gallery and more info