P-120 Malakhit

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The SS-N -9 Siren is a ship - and submarine -based anti-ship missile from the Soviet / Russian production. The GRAU index 4K85 is and index system of the Russian armed forces P -120 Malachite.


The SS-N -9 was developed as a successor system of the SS -N -7 Starbright. The system is used to combat Seekriegsverbänden and aircraft carrier groups. The development in the design office OKB -52 Tschelomei (later NPO Maschinostrojenija ) began in 1963. The first systems were introduced in 1972 in the Soviet naval forces. The following units have been equipped with the SS -N -9:

  • Submarines of the Charlie II class, each with eight missiles
  • Corvettes of the Nanuchka class, each with six missiles
  • Hydrofoils Sarancha the class, each with four missiles


  • P-50 Malachite: pre-series. Reach 70 km.
  • P -120 Malachite: Standard version range 110 km. introduced in 1972
  • P- 120E malachite -E: Export version with simplified electronics.
  • P- 120M Malachite M: Improved version from 1975 with new electronics and a new radar seeker head. . Range 120-150 km.


The missiles are housed in starting and transport containers outside the pressure hull. Before the start of the coordinates as well as the price of the target must be entered in the navigation system of the missile. These are determined by means of sonar, radar and ELINT from the U- boat. The launch of the missiles is done with the march engine and two boosters on the missile tail. The missiles can be launched individually or in a short series from a diving depth of up to 50 m. After piercing the water surface, the missile climbs to a height of around 100 m. After burning the two boosters they are thrown off and the missile drops to a cruising altitude of 40 m. A radar altimeter provides the necessary safety distance between the missile and the sea surface. The flight to the target area is done autonomously by means of inertial navigation platform. Updated target data can be transmitted by the launch platform for the missile by means of a data link. For the target approach are an active radar seeker and a passive infrared seeker head for use. If the target detected, it is served in a shallow dive. The impact in the target occurs at water level.


The SS-N -9 is only at the Russian naval forces in action. The system was never exported.


  • Russian / Soviet sea- based anti -ship missiles. DTIG - Defense Threat Information Group, November 2005
  • Jane's Naval Weapon Systems Edition 2005. Jane's Publishing