9M337 Sosna-R
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The 9M337 Sosna-R (Pine) (SA-X-25)[1][2] is a Russian radar and laser-guided supersonic (Mach 2.6) two-stage missile. It is used in Sosna-R short range air defense missile system designed to protect military units from air attacks in all types of combat situations, including during march.

Key Information

In 2017, official tests of the newest air defense missile system Bagulnik (domestic variant which is currently named Strela-10ML) were successfully completed.[3][4][5]

Description

[edit]

It was developed by KB Tochmash as a successor to 9K35 Strela-10, and is a cheaper alternative to the Tor missile system and Pantsir-S1. Designed to work in passive mode with the help of different imaging systems (thermal camera, TV camera) and a laser rangefinder in order to find and engage a target, Sosna-R is able to operate effectively under the control of various types of old, modern and prospective battery command posts, the most preferable of which is the FPU "Assembly-M1-2" (9S80M1-2) and is resistant to jamming. It uses a tracked SAM launcher with 12 missiles of 10 km range and altitude of 5 km, based on the MT-LB vehicle. Those 12 missiles can be reloaded in 12 minutes.[6][7] The serial production version is based on the BMP-3 IFV.[8][9] The Sosna can also deliver fire while on the move.[10] The system has a crew of two: the driver and gunner.

The system is armed with 12 9M340 missiles that are held in their transport-launch containers and arranged in two banks of six.[11] Sosna-R beam rider 38 kg missiles are two-stage, capable of destroying aircraft, helicopters, cruise missiles, aerial bombs, small-sized air attack weapons including elements of high-precision weapons and light armored vehicles. The missile can change direction mid-flight.[12][13] It also has a combined impact/proximity laser fuze. Its payload is made up of two warheads weighing a total of 7 kg. The fragmented-rod warhead is designed for proximity detonation when flying close to the target, while the armor-piercing/fragmentation (AP-Frag) warhead goes off on impact.[14] The system has high resistance to jamming and besides its passive mode of operation it can be equipped with an additional small-size acquisition radar.

The Palma anti-aircraft artillery system features integrated armament that comprises eight Sosna-R precision surface-to-air missiles with laser beam guidance and two AO-18KDE rapid-fire guns. As a defense component, the Palma is designated to defend both ships and naval bases, coastal infrastructure and aerodromes, and also other vital facilities.[15]

Range

[edit]

Within 8–10 (≤ 20) km.

The Palma-SU CIWS on Vietnamese Gepard 3.9 frigates using Sosna-R missiles.

Variants

[edit]
  • Sosna A weapon module for MBT, IFV, APC, AFV
  • Sosna RA for AFV, MBT, IFV, APC
  • Palash CIWS
  • Palma CIWS - the deliveries of the systems to the Russian Navy and foreign navies started in 2011.[16][17]
  • Ptitselov CIWS is an air transportable version based on the BMD-4M chassis and it can also be dropped by parachute[18]

Operators

[edit]

Current operators

[edit]
 Russia
 Vietnam

Potential operator

[edit]

Egypt

  • Potential Palma CIWS acquisition reported.[19]

See also

[edit]

References

[edit]
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9M337 Sosna-R

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The 9M337 Sosna-R (Pine) is a Russian short-range surface-to-air missile (SAM) system designed to provide mobile air defense for ground forces against low-altitude threats, including fixed-wing aircraft, helicopters, cruise missiles, and precision-guided munitions.[1][2] The system employs a supersonic, two-stage, laser-guided missile with beam-rider technology, achieving speeds of up to 1,200 m/s (approximately Mach 3.5) and capable of engaging targets at ranges of 1.3 to 10 km and altitudes from 2 to 5,000 meters.[2][1][3] Developed by the Nudelman Precision Engineering Design Bureau (KBtochmash) under the High-Precision Complexes division of Rostec, the Sosna-R represents an advancement in lightweight, vehicle-mounted air defense, intended to replace older systems like the Strela-10M (SA-13 Gopher).[1][2] Initial operational capability was achieved in 2011, with state trials announced in 2015, and the system entered active service with Russian armed forces in 2019.[2][1] The missile itself weighs 42 kg at launch (30.6 kg without booster), carries a 7 kg high-explosive fragmentation warhead, and demonstrates high maneuverability with a maximum load factor of up to 50g.[2][1] The Sosna-R's electro-optical control system (EOCS) integrates radar detection with laser guidance for all-weather operation, allowing it to track up to 50 targets simultaneously and engage in 360-degree azimuth coverage from a 12-missile launcher pod.[1] It is highly adaptable, mounted on various chassis such as the tracked MT-LB (with a top speed of 62 km/h and 500 km range), wheeled BTR-82A or BTR-90, and even the BMP-3 infantry fighting vehicle, enabling rapid deployment in diverse terrains.[1] Additionally, the 9M337 missile variant is integrated into the shipborne Palma-SU naval defense system, expanding its utility to maritime protection.[2] The system is operated by Russia and Vietnam, with export interest from other countries in Southeast Asia and the Middle East.[1]

Development

Origins and Design Phase

The 9M337 Sosna-R missile system emerged as a direct successor to the aging 9K35 Strela-10 short-range air defense system, which faced significant limitations in engaging modern aerial threats such as low-flying cruise missiles, unmanned aerial vehicles, and precision-guided munitions due to its outdated infrared guidance and limited range and speed capabilities.[4][3] Developed to address these shortcomings, the Sosna-R was conceived to provide enhanced protection for ground forces against evolving air attack means, emphasizing mobility and effectiveness in contested environments.[4][5] Development of the Sosna-R began around 2005 under the auspices of the Nudelman Precision Machine-Building Design Bureau (KB Tochmash), a subsidiary of High Precision Systems within the Rostec State Corporation, with the system unveiled at the Army-2018 forum and preliminary operational capability achieved around 2011.[3][5][4] The project focused on creating a supersonic, two-stage solid-fuel missile design optimized for short-range air defense, prioritizing lightweight construction and high maneuverability to counter fast-moving targets.[3] Key engineering efforts centered on achieving a missile speed exceeding Mach 2.5 while maintaining a launch weight of 42 kg, which presented challenges in balancing propulsion efficiency, structural integrity, and aerodynamic stability during the boost and sustain phases.[3][1] Central to the design phase were goals to bolster electronic warfare resilience through an advanced electro-optical guidance system resistant to jamming, enabling all-weather operations via combined radio-command and laser-beam homing for precise target acquisition even in low-visibility conditions.[4] The system was engineered for fire-on-the-move capability, allowing launches from tracked vehicles such as the MT-LB chassis while in motion, thereby supporting dynamic battlefield maneuvers without compromising accuracy.[4] These innovations aimed to integrate seamlessly with existing mechanized units, providing a cost-effective upgrade over more complex systems like the Tor or Pantsir-S1 while retaining operational simplicity.[4] Early prototypes underwent iterative refinements to optimize the dual-stage configuration, where the initial booster provided rapid acceleration and the sustainer ensured extended powered flight, addressing hurdles in miniaturizing components for reduced overall system weight and improved launcher compatibility.[3]

Testing and Entry into Service

The development of the 9M337 Sosna-R missile system as a successor to the Strela-10 involved rigorous testing phases, with official evaluations completed in 2017 under the Bagulnik program, later redesignated as Strela-10ML. These tests encompassed live-fire trials targeting simulated aircraft and helicopters to validate the system's interception capabilities in operational scenarios.[6] Following preliminary tests, state trials began in the summer of 2015 at Russian testing grounds, with completion announced in 2019, leading to certification by the Russian Ministry of Defense. The certification process highlighted the system's reliability across diverse terrains, including rough and mobile environments, as well as its resilience in electronic warfare conditions through jam-protected electro-optical guidance.[7][8] The Sosna-R entered service with the Russian armed forces in 2019, following the Ministry of Defense's decision to adopt the system for short-range air defense roles. Serial production commenced in 2018, with full-scale deliveries authorized in 2022 by High Precision Systems, enabling broader integration into military units.[6][8][4] Initial deployments focused on motorized and airborne units, such as the Ptitselov variant mounted on BMP-3 vehicles for Russian Airborne Forces. Crew training protocols were established for a two-person operation, consisting of a driver and a gunner, emphasizing rapid setup, target acquisition, and fire control in dynamic battlefield conditions.[6]

Design and Components

Missile Configuration

The 9M337 Sosna-R employs a two-stage solid-fuel rocket configuration, where the initial boost stage provides rapid acceleration post-launch, and the sustainer stage maintains propulsion during mid-course flight. This architecture incorporates a detachable booster motor, separating after initial burn to reduce mass and enhance efficiency, while enabling the missile to perform aggressive maneuvers with lateral overloads up to 52 g.[9][2][10] Physically, the missile measures approximately 2.3 meters in length during flight (2.4 meters when housed in the transport-launch container) and has a body diameter of 72 mm, expanding to 132 mm with the booster stage attached. Its total weight at launch, including the container, is around 42 kg, making it compact for integration into mobile platforms while supporting vertical launch from sealed canisters.[9][2] The warhead is a dual-mode design totaling approximately 7 kg, featuring a fragmented-rod configuration for proximity airburst effects via laser proximity fuse and an armor-piercing fragmentation mode for direct impact detonation. This setup, triggered by a combined laser-impact fuze, optimizes lethality against aerial targets by adapting to engagement scenarios.[1][9] Aerodynamic control is provided by fixed tail fins on the sustainer stage, ensuring stability during supersonic flight following booster separation.[3]

Guidance and Launcher Systems

The 9M337 Sosna-R employs a hybrid guidance system using radio-command in the initial phase after launch, transitioning to semi-active laser beam-riding for the main flight phase.[3] This approach allows the missile to ride along a laser beam directed at the target, providing precise control while minimizing susceptibility to electronic countermeasures. The system's jam-resistant acquisition is facilitated by passive sensors that avoid active emissions during initial targeting.[11] The sensor suite integrates an optical-electronic station equipped with a passive thermal imaging and television (TV) camera for all-weather, day-night operation, alongside a laser rangefinder for accurate distance measurement.[3] An accompanying radar supports detection of airborne threats and cueing for the passive optical systems, which operate in a sector-scanning mode to track multiple targets autonomously.[3] This configuration emphasizes low observability, as the system can function without radar emissions in passive mode to reduce vulnerability to anti-radiation threats.[9] The launcher is mounted on a tracked vehicle chassis, typically the MT-LB multi-purpose armored tractor or the BMP-3 infantry fighting vehicle, ensuring compatibility with mechanized units.[3] It accommodates 12 ready-to-fire 9M337 missiles housed in sealed transport-launch canisters arranged in two vertical banks of six, which protects them from environmental factors and allows rapid deployment.[3] Reloading the full complement requires approximately 12 minutes using standard equipment.[3] Mobility features include fire-on-the-move capability, permitting engagement of targets while the vehicle travels at speeds up to 60 km/h over rough terrain.[3] The system is operated by a two-person crew—a driver and a gunner—who manage detection, tracking, and launch from a protected cabin, supporting continuous operations in dynamic battlefield conditions.[3] The missile's two-stage propulsion further aids guidance stability during high-maneuver flight profiles.[11]

Specifications and Performance

Key Technical Parameters

The 9M337 Sosna-R missile attains a maximum speed of Mach 2.6, equivalent to approximately 900 m/s, enabling rapid response to aerial threats.[1] This hyper-velocity performance supports its role in protecting military units from low-flying threats such as cruise missiles.[3] Its effective engagement range spans 1.3 to 10 km, with an altitude ceiling of 5 km (effective up to 3.5 km against certain targets).[1][2][9] The system operates across a broad environmental spectrum, including temperatures from -50°C to +50°C, and maintains functionality in day/night and adverse weather scenarios.[12] Resistance to electronic jamming is achieved through its multi-mode guidance, combining radio command in the initial phase with laser beam-riding for terminal control.[3] Key kinematic characteristics include a time-to-target of under 6 seconds for engagements within 5 km and approximately 11.5 seconds at the 8 km mark, reflecting efficient two-stage propulsion.[2] The missile's single-shot kill probability exceeds 0.8 against maneuvering aircraft, bolstered by a 7 kg warhead and high maneuverability up to 52g overload.[3][2][1]
ParameterValueNotes/Source
Maximum SpeedMach 2.6 (900 m/s)Average across sources; some cite up to 1,200 m/s.[1][3]
Engagement Range1.3–10 kmEffective against low-altitude targets; minimum 1.3 km.[1][2]
Maximum Altitude5 km (effective 3.5 km)Ceiling for intercepts.[1][9]
Operational Temperature-50°C to +50°CSystem-wide tolerance based on platform.[12]
Time-to-Target (max range)<6 s (short range); 11.5 s (8 km)Kinematic flight duration.[2]
Single-Shot Kill Probability>0.8 (up to 0.95)Against maneuvering targets.[3]

Engagement Capabilities

The 9M337 Sosna-R missile system is designed to engage a variety of aerial threats, including fixed-wing aircraft, helicopters, unmanned aerial vehicles (UAVs), cruise missiles, and guided bombs. It can intercept targets traveling at speeds up to 500 m/s while performing maneuvers with overloads up to 10 g, enabling effective neutralization of high-maneuverability threats such as low-flying aircraft and precision-guided munitions.[13][9][3] The system supports flexible fire modes, including single-shot launches or rapid fire from the 12-missile launcher, with capability to engage one target at a time while tracking up to 50 potential threats and prioritization based on predefined criteria such as proximity or threat level, with semi-automatic or fully automatic guidance via laser beam-riding.[1][9] In defensive roles, the Sosna-R is optimized for point air defense of military units, convoys, and static installations, offering 360-degree azimuthal coverage through a rotating turret and all-weather/day-night operation via thermal imaging and television channels. This integration enables protection during maneuvers or in adverse conditions, with the system's passive electro-optical sensors reducing detectability compared to radar-based alternatives.[3][9][1] Key limitations include a minimum engagement range of approximately 1.3 km, preventing intercepts of very close-range threats, and a finite capacity of 12 missiles per launcher, which may render the system vulnerable to saturation attacks involving more than a dozen simultaneous incoming projectiles.[9][13]

Variants

Ground-Based Systems

The core ground-based variant of the 9M337 Sosna-R system is mounted on the MT-LB tracked armored personnel carrier chassis, providing mobile short-range air defense for Russian Ground Forces units. This configuration features a 360-degree rotating turret equipped with two 6-missile launchers, accommodating 12 ready-to-fire 9M337 missiles, along with an electro-optical search and tracking system for day/night operations. The system integrates radar and laser guidance to engage low-flying aircraft, helicopters, cruise missiles, and unmanned aerial vehicles at ranges up to 10 km and altitudes up to 5 km, serving primarily as a replacement for the older 9K35 Strela-10 in motorized rifle divisions.[3][1] The Sosna A and Sosna RA represent modular weapon stations designed to enhance the anti-air capabilities of existing infantry fighting vehicles (IFVs) and armored platforms, such as the BMP-3. These upgrades replace or supplement conventional armaments with a compact launcher holding up to 8 missiles, utilizing the same 9M337 Sosna-R munitions for seamless integration into mechanized units. The Sosna A variant emphasizes close-range engagements up to 4 km against slower targets like drones and guided munitions, while the Sosna RA offers improved stabilization and remote operation for on-the-move firing, increasing the survivability of forward-deployed troops against aerial threats.[3] For airborne operations, the Ptitselov variant adapts the Sosna-R system to the BMD-4M airborne assault vehicle chassis, enabling rapid deployment by parachute or helicopter airdrop to support paratrooper units. This configuration carries 12 missiles in two 6-round pods, operated by a reduced crew of two—a driver and a remote gunner—who monitor engagements via an onboard console with video feeds from the missile's seeker. Key features include enhanced anti-fragmentation armor, amphibious capability, and quick setup times under 5 minutes post-landing, allowing airborne forces to establish protective air cover in contested environments. All ground-based variants share the core 9M337 missile design, which employs two-stage propulsion for supersonic speeds exceeding 900 m/s. As of 2025, Sosna-R systems have been deployed in the Russo-Ukrainian War, with confirmed use against low-altitude threats.[14][15][3][16] Initial adoption of the Sosna-R ground-based systems into Russian service occurred in May 2019, when the Ministry of Defense approved their integration into motorized rifle divisions for enhanced tactical air defense. Serial production followed, with deliveries commencing to equip frontline units against evolving low-altitude threats.[6][3]

Naval and Modular Adaptations

The Palash CIWS serves as a compact close-in weapon system tailored for smaller naval vessels, employing eight 9M337 Sosna-R missiles to provide self-defense against low-altitude air threats such as anti-ship missiles and aircraft. Integrated with 30 mm AO-18KD rapid-fire cannons and the 3V-89 electro-optical fire control system, it emphasizes high-precision engagement through laser beam-riding guidance for the Sosna-R missiles. Deliveries of the Palash to naval operators commenced around 2011, marking an early adaptation of the Sosna-R for maritime roles.[2] The Palma CIWS extends this capability to larger surface combatants, functioning as an advanced hybrid gun-missile system with configurations supporting eight to sixteen Sosna-R missiles across one or two 3R-99E firing modules. It incorporates the 3Ts-99 Positiv-ME1 radar for target acquisition alongside optronic sensors, enabling autonomous detection and engagement of supersonic threats at ranges up to 10 km. Operational deployment of the Palma began around 2011 on corvettes and frigates, where it bolsters layered air defense by combining the Sosna-R's hypersonic performance with dual 30 mm cannons firing at 10,000 rounds per minute.[17][2] Beyond fixed naval integrations, the Sosna-R benefits from a modular architecture that permits mounting on diverse international chassis, supporting export-oriented adaptations for allied forces. This flexibility includes truck-mounted variants on wheeled platforms like the BTR-82A or similar 8x8 vehicles with at least 3.5-ton payload capacity, allowing non-tracked armies to deploy the system without requiring specialized tracked carriers. Such configurations have been promoted for export markets, including Southeast Asia, to address varied logistical needs while retaining the core laser-guided missile and optronic tracking elements.[18][19][20] Naval adaptations of the Sosna-R, as seen in the Palash and Palma, feature robust construction suited to maritime conditions, including corrosion-resistant materials for prolonged exposure to saltwater environments and gyro-stabilized turrets to maintain accuracy during vessel motion in rough seas. These enhancements derive from the baseline ground-based design but are optimized for shipboard integration, ensuring reliable performance against dynamic aerial threats in open-water scenarios.[17]

Operators

Current Operators

Russia serves as the primary operator of the 9M337 Sosna-R missile system, having integrated it into its armed forces after completing state trials and testing in 2019.[8] The system is deployed across the Russian Ground Forces to provide mobile short-range air defense for motorized rifle units, replacing older Strela-10 platforms and enhancing protection against low-altitude aircraft, helicopters, and precision-guided munitions.[1] In the Russian Navy, the Sosna-R equips Project 22800 Karakurt-class corvettes via the Palma-SU close-in weapon system, enabling effective defense against anti-ship threats in littoral zones.[21] Vietnam acquired the Sosna-R in the mid-2010s as part of its naval modernization, incorporating the missiles into the Palma CIWS on Gepard 3.9-class frigates purchased from Russia.[22] These platforms bolster Vietnam's coastal and maritime air defense capabilities, with the Sosna-R providing supersonic interception against incoming aircraft and cruise missiles.[23] The systems on Vietnamese Gepard 3.9-class frigates were commissioned between 2011 and 2018 and are fully operational.

Export and Potential Users

Russian state arms exporter Rosoboronexport has actively promoted the Sosna-R at international military-technical exhibitions to expand its market reach, including detailed presentations at the International Maritime Defence Show (IMDS) in 2013 and the MAKS air show in 2018.[24][4] Further efforts included showcasing wheeled variants on non-NATO chassis, such as the BTR-82A, at the Army-2021 forum to demonstrate adaptability for diverse operational environments and buyer preferences.[19] These promotional activities target regions like Southeast Asia and the Middle East, where the system is positioned as a mobile, laser-guided solution for protecting ground and naval forces.[20] As of November 2025, no additional export contracts beyond Vietnam have been publicly confirmed.

References

  1. Sosna - Army Recognition
  2. Sosna-R
  3. Russian hi-tech firm showcases latest Sosna short-range air ... - TASS
  4. sosna-r 9m337 (sa-25) - GlobalSecurity.org
  5. State trials of Sosna air defense system to start in summer - Alert 5
  6. Ptitselov air defense missile system to equip Russian Airborne Forces
  7. 9M337 Sosna-R Russian Short-Range Air Defense Missile System
  8. Testing of 9M337 Sosna-R completed - Alert 5
  9. Anti-aircraft missile system 'Pine'. - Missilery.info
  10. ЗРАК 3М89 "Палаш" (9М337, 9М340) (2007г.) - war-russia.info
  11. Sosna
  12. MT-LB - Tankograd
  13. Serial production Sosna short-range air defence system unveiled
  14. Russia developed parachute-dropped Ptitselov SAM for Airborne units
  15. SAM "Ptitselov" on the eve of adoption - Military Review
  16. https://armyrecognition.com/military-products/navy/weapons-systems/close-in-weapon-system/kashtan
  17. Russia's Palma naval AAGM lands at a foreign ship
  18. https://armyrecognition.com/focus-analysis-conflicts/army/defence-security-industry-technology/new-sosna-air-defense-missile-system-will-enter-soon-in-serial-production
  19. Wheeled version of the Sosna air defense missile system
  20. Russia offers Sosna air defense system for export to Southeast Asia
  21. Russian Navy to receive this year two Karakurt-class Project 22800 ...
  22. Vietnam to Receive 2 Russian Anti-Submarine Warfare Ships in 2016
  23. Vietnamese People's Navy - Modernization - GlobalSecurity.org
  24. Rosoboronexport to show over 100+ defence items at the IMDS ...
  25. Official trials of new Russian-made Sosna air defense missile ...
  26. Russian air defence systems target Asia, Latin America markets
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