R-39

🇷🇺Russian Federation
Soviet State Industry
1983 – Present
Overview
R-39
The R-39, or SS-N-20 Sturgeon, is an intercontinental submarine-launched ballistic missile developed by the Soviet Union, entering service in 1983 and decommissioned in 2004. It featured a three-stage solid-fuel rocket engine, capable of carrying multiple thermonuclear warheads, and was exclusively deployed on Typhoon-class submarines, with its development marked by initial testing challenges and a subsequent unsuccessful successor program.
Specifications

General

GuidanceAstro-inertial guidance
Max Range Km8,300 km
Research Notes

Heavy SLBM for Typhoon-class submarines

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The R-39, NATO SS-N-20 Sturgeon, was developed as the missile armament for the Soviet Project 941 Typhoon ballistic missile submarines. Its size reflected the requirement to carry multiple nuclear warheads from a very large submarine platform.

Large solid-fuel missile with strategic payload

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Open-source references describe the R-39 as a multi-stage solid-fuel SLBM associated with MIRV payloads and intercontinental reach. The system was therefore a sea-based strategic deterrent rather than a surface-to-air weapon, despite the current category assignment needing later taxonomy cleanup.

Strategic system retired with the Typhoon missile era

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The R-39 entered service in the late Cold War and was eventually withdrawn as Russia retired or converted Typhoon-class missile capability. Its database value is in linking the missile, Typhoon submarines, and Soviet/Russian sea-based nuclear deterrence.

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