SS-N-23 Skiff

SS-N-23 Skiff. The SS-N-23 Skiff is the NATO reporting name for a family of liquid-propellant submarine-launched ballistic missiles (SLBMs) developed by the Soviet Union and later operated by the Russian Navy. Designed by the Makeyev Rocket Design Bureau, it represented a significant advancement in Cold War naval strategic weaponry, offering improved range, accuracy, and payload over its predecessors. The missile entered service in the mid-1980s and remains a key component of Russia's nuclear triad.

Development and design

The development of the missile, designated R-29RM within the Soviet Armed Forces, was initiated in 1979 to replace the earlier R-29R (SS-N-18 Stingray). The project was led by chief designer V. P. Makeyev at the Makeyev Rocket Design Bureau, with the goal of creating a more powerful and survivable weapon for the Project 667BDRM Delfin (Delta IV-class submarine). Key innovations included a new, more efficient liquid-propellant rocket engine and an advanced astro-inertial navigation system that provided greater accuracy for striking hardened targets like Minuteman III silos in the United States. The design emphasized a streamlined, three-stage configuration to maximize the throw-weight of its multiple MIRV warheads, a direct response to the strategic arms competition outlined in treaties like SALT II.

Operational history

The R-29RM missile was officially accepted into service with the Soviet Navy in 1986, with the first patrols conducted by the Delta IV-class submarine K-51 Verkhoturye. Throughout the late Cold War, these submarines armed with the SS-N-23 formed a critical element of the Soviet strategic deterrence posture, conducting deterrent patrols in bastions like the Barents Sea and the Sea of Okhotsk. Following the dissolution of the Soviet Union, the missiles were inherited by the Russian Navy; however, production halted in 1991 due to economic hardship and the START I treaty. A modernization program was launched in 1999, leading to the production of upgraded variants. These missiles have been regularly test-fired during exercises, such as those monitored from the Kura Test Range, and remain on active duty, with continuous patrols reported into the 2020s from bases like Gadzhiyevo.

Variants

* R-29RM (RSM-54): The original baseline model introduced in 1986, carrying four MIRV warheads. * R-29RMU Sineva (RSM-54U): A major upgrade first tested in 2004, featuring improved navigation systems, extended range, and the ability to carry up to ten lower-yield warheads or special payloads. It was formally adopted after a successful launch from the TK-208 (Typhoon-class submarine) in the White Sea. * R-29RMU2 Layner (RSM-54U2): A further evolution tested around 2011, reportedly carrying an increased number of warheads with enhanced penetration aids to counter missile defense systems. * R-29RMU2.1 and R-29RMU2.2: Designations for the most recent iterations, integrating modernized components for service life extension and compatibility with ongoing strategic modernization efforts under the State Armaments Programme.

Specifications

The SS-N-23 is a three-stage, liquid-propellant missile. It has a launch weight of approximately 40,300 kilograms, a length of 14.8 meters, and a diameter of 1.9 meters. Its maximum operational range is about 8,300 kilometers. The original R-29RM variant was equipped with a MIRV payload of four thermonuclear warheads, each with a yield estimated between 100 and 200 kilotons. Guidance is provided by a sophisticated astro-inertial navigation system that corrects its flight path by referencing stars, granting it a reported CEP of around 500 meters. The missile is designed for a cold launch from the D-9RM launch system aboard Delta IV-class submarines.

Operators

* Russia: The sole operator. The missiles are deployed exclusively with the Russian Navy's Northern Fleet, specifically aboard the modernized Delta IV-class submarines. These submarines operate from bases such as Gadzhiyevo near Severomorsk. The SS-N-23 system is a central pillar of Russia's maritime strategic forces under the command of the Russian Aerospace Forces' 12th Main Directorate.

Category:Submarine-launched ballistic missiles of the Soviet Union Category:Submarine-launched ballistic missiles of Russia Category:Cold War naval weapons of the Soviet Union