9K33 Osa

"SA-8" redirects here. For the Apollo flight, see A-104 (SA-8). For other uses, see SA8 (disambiguation).

The 9K33 Osa (Russian: 9К33 «Оса», literally "wasp"; NATO reporting name SA-8 Gecko) is a highly mobile, low-altitude, short-range tactical surface-to-air missile system developed in the Soviet Union in the 1960s and fielded in 1972. Its export version name is Romb.^[6]

9K33 Osa (NATO reporting name: SA-8 Gecko, SA-N-4 Gekko)
9A33BM3 transporter-launcher and radar vehicle of the upgraded 9K33M3 Osa-AKM
Type	6×6 amphibious SAM system
Place of origin	Soviet Union
Service history
In service	1971–present
Used by	See list of present and former operator
Wars	Iran–Iraq War 1982 Lebanon War Angolan Civil War Western Sahara War Persian Gulf War 2008 Russia-Georgia war 2011 Libyan civil war Syrian Civil War 2020 Armenian–Azerbaijani skirmishes^[1] 2020 Nagorno-Karabakh conflict 2022 Russian invasion of Ukraine^[2]
Production history
Designer	NII-20 Research Institute
Designed	1960–1972
Manufacturer	Znamya Truda Plant
Produced	1970–1988^[3]
No. built	1,200^[4]
Variants	OSA-A, OSA-AK, OSA-AKM, OSA-M
Specifications (OSA-AKM)
Mass	17.5 tonnes
Length	9.14 m
Width	2.75 m
Height	4.20 m (radar mast stowed)
Crew	5 soldiers
Main armament	6 9M33, 9M33M1, 9M33M2 or 9M33M3 missiles
Engine	D20K300 diesel
Ground clearance	400 mm
Operational range	500 km^[5]
Maximum speed	80 km/h 8 km/h (swimming)

Description

 

The Polish OSA-AKM

The Osa was the first mobile air defense missile system incorporating its own engagement radars on a single vehicle.

All versions of the 9K33 feature all-in-one 9A33 transporter-launcher and radar vehicles which can detect, track and engage aircraft independently or with the aid of regimental surveillance radars. The six-wheeled transport vehicles BAZ-5937 are fully amphibious and air transportable. The road range is about 500 km.

The 1S51M3-2 radar system on the 9K33 Osa TELAR received the NATO codename Land Roll. It was derived from the naval 'Pop Group' radar system but is smaller since it does not require the elaborate stabilisation system. An improved system, the Osa-AKM (NATO reporting name SA-8B 'Gecko' Mod 1) was first seen in Germany in 1980. It had improvements added to the launcher configuration, carrying six missiles in ribbed containers.

The system is reported to be of the frequency-agile monopulse type. It consists of an elliptical rotating surveillance antenna mounted on top of the array, operates in H band (6 to 8 GHz) and has a 30 km acquisition range against most targets. The large pulsed J band (14.5 GHz) engagement antenna is mounted below it in the centre of the array and has a maximum tracking range of about 20 km.

Mounted on either side of the tracking radar antenna is a small J band parabolic dish antenna to track the missile. Below that is a small circular antenna which emits an I band uplink capture beam to gather the missile shortly after launch. The final antennas in the array are two small white rectangular ones, one on either side of the array mounted alongside the I band. These are used for command uplink to the missile. This twin antenna system permits the 'Land Roll' radar to control up to two missiles simultaneously against a single target.

The two missiles can be guided on different frequencies to further complicate electronic countermeasures (ECM). There is a tubular device fitted to and above the tracking radar; this is a 9Sh33 electro-optical tracker. It can be used to track the target when the main tracking radar is jammed by ECM.

A 9K33 battery comprises four 9A33B TELAR vehicles and two 9T217 transloader vehicles on BAZ-5939 chassis with reload missiles and a crane. A reload time of five minutes has been reported per TELAR.

In addition to the TELARs, each regiment is also assigned a single radar collimation vehicle 9V914 (initially on the BAZ-5938 chassis but more often found on the ZiL-131 truck). This vehicle assists in the alignment of the TELAR's radar systems, ensuring accurate target tracking and engagement.

Variants

 

SA-N-4 launcher covered by a circular plate on the Slava-class cruiser Marshal Ustinov.

• 9K33 "Osa" (US DoD designation SA-8A "Gecko") began development in 1960 and was introduced in 1971–1972 with four exposed 9M33 missiles per TELAR 9A33B and a maximum range of 12 km (7.5 mi).
• 4K33 "OSA-M" (NATO reporting name SA-N-4 "Gecko") was introduced in 1972 and is the naval version of the system with two 9M33M missiles on a Zif-122 retractable rotating launcher and improved performance. It has been installed on Gepard-class frigate, Kara-class guided missile cruisers, Kiev-class VTOL cruisers and also the Kirov, Slava and Krivak classes.
• 9K33M2 "Osa-AK" (US DoD designation SA-8B "Gecko Mod-0") with TELAR 9A33BM2 was introduced in 1975 with the new six-missile box launcher, each 9M33M2 missile being a sealed round.
• 9K33M3 "Osa-AKM" (US DoD designation SA-8B "Gecko Mod-1") with TELAR 9A33BM3 and missiles 9M33M3 was introduced in 1980 with the maximum range extended to 15 km (9.3 mi) and maximum altitude to 12 km (40,000 ft) as explained above. Most OSA-AKM systems also feature an IFF antenna.
• Saman and Saman-M (Russian Саман – adobe) is a development of the Osa\Osa-M system into target drones, used for testing and training with air defense systems, including SAMs.

The 9K33M3 is also able^{[citation needed]} to use missiles which are wire-guided, presumably for use in an ECM-heavy environment where the radio command guidance may not operate properly.

Missiles

9M33
The 9M33M3 missile
Type	Surface-to-air missile
Place of origin	Soviet Union
Service history
In service	1971–present
Used by	See list of present and former operator
Production history
Designer	MKB "Fakel"
Designed	1960–1972
Manufacturer	Znamya Truda Plant
Produced	1970–1988
Variants	9M33, 9M33M1, 9M33M2, 9M33M3, 9A33BM3
Specifications (9K33M3^[8])
Mass	170 kg
Length	3158 mm
Diameter	209.6 mm
Warhead	Frag-HE
Warhead weight	16 kg^[7]
Detonation mechanism	Contact and proximity
Propellant	Solid propellant rocket motor
Operational range	15 kilometres (9.3 mi)
Flight altitude	12,000 metres (39,000 ft)
Boost time	2 s boost, then 15 s sustain
Maximum speed	1020 m/s
Guidance system	RF CLOS
Steering system	dual-thrust rocket motor.
Accuracy	5 m
Launch platform	9P35M2

Engagement range for the early versions is approximately 2–9 km (1.3–5.6 miles) and engagement altitudes of between 50 and 5,000 m (164–16,400 ft). The 9M33M2 "Osa-A" missile extends the ranges out to 1.5–10 km (1–6.2 miles) and engagement altitudes to 25–5,000 m (82–16,400 ft). The 9M33M3 missile greatly enhances the altitude engagement envelope to 10–12,000 m (33–42,500 ft), and as such are also able to fly further (about 15 km/9 miles) but the system is not able to engage targets at longer ranges, due to other factors such as the radar tracking of the missiles. The system is designed for use primarily against jet aircraft and helicopters in any kind of weather.

The 9M33 missiles are 3.158 m (10.3 ft) long, weigh 126 kg (278 lb) and use command guidance. There is also a backup low-light optical tracking system for heavy ECM environments. The latest 9M33M3 missiles have an increased total weight of 170 kg (375 lb) in order to provide the extended range coverage and larger warhead. Propulsion is provided by a dual-thrust solid fuel rocket motor. Both versions feature a missile speed of around Mach 2.4 (peaking at around Mach 3) for a maximum target engagement speed of around Mach 1.4 for the original missile and Mach 1.6 for the M2\M3 missiles. The warhead for the initial and M2 versions weighs 19 kg (42 pounds), increased to 40 kg (88 lb) in the M3 version to improve performance against helicopters. All versions have impact and proximity fuzes.

There have been unconfirmed reports of other possible versions of the missile with both infrared and semi-active radar terminal homing seekers.

Each TELAR is able to launch and guide two missiles against one target simultaneously. Kill probability is quoted as being 0.35–0.85 for the Osa and 0.55–0.85 for the Osa-AK and Osa-AKM (presumably depending upon target aspect, speed, maneuverability and radar cross section). Reaction time (from target detection to launch) is around 26 seconds. Time to prepare for engagements from being in transit is around 4 minutes and missile reloading takes around 5 minutes. Each battery of four TELARs is usually accompanied by two reload vehicles carrying 18 missiles in sets of three, with a crane mounted on the reload vehicles to assist in moving the missiles.

When launched the booster motor burns for two seconds, this permits the radar to gather and control it at very short ranges (about 1.6 km). The sustainer motor has a 15-second burn, bringing the missile to a top speed of about Mach 2. Once launched the missile is command-guided for the whole flight, and the warhead is detonated by its proximity fuze or possible command. The warhead is said to have a lethal radius of 5 m at low altitude against an F-4 Phantom size target.^{[citation needed]}

Radars

 

P-40 'Long Track' radar set

• 1S51M3 ("Land Roll") – C band target acquisition radar, H band conical scan target tracking radar and two J band pulse mode fire control radars (range 35 km/22 miles for acquisition, 30 km/19 miles for tracking and 25 km/16 miles for guidance). Mounted on the TELAR.
• P-40 ("Long Track") – E band early warning radar (also used by the 2K11 Krug and 2K12 Kub, range 175 km/108 miles), mounted on a tracked vehicle (a modified AT-T).
• P-15 ("Flat Face A") or P-19 ("Flat Face B") or P-15M(2) ("Squat Eye") – 380 kW C band target acquisition radar (also used by the S-125 Neva and 2K12 Kub, range 250 km/155 miles), mounted on a ZiL-131 truck.
• PRV-9 or PRV-16 ("Thin Skin") – E band height finding radar (also used by the 2K11 Krug and 2K12 Kub, range 240 km/148 miles), mounted on a KrAZ-255B truck.

Deployment and history

Produced by the USSR/Russia, there are many export customers for this system, including Cuba, Greece (from the former East Germany), Poland, Syria, Ecuador and Iraq.

After the Israeli invasion of Lebanon in 1982, in which Syrian air defenses were obliterated by a massive air campaign against Syrian SAM sites in the Beqaa valley, the Syrians managed to deploy Osas. At least one F-4 Phantom in a SEAD mission was shot down on July 24, 1982 by an Osa system. The WSO (back seater), Aharon Katz was killed, while the pilot, Gil Fogel, survived and was held captive by the Syrians for two years.^[9]

In late 1980s, Cuba deployed several 9K33 Osa units in southern Angola which posed a significant threat to South African air superiority at shorter ranges.^[10] The South African 61 Mechanised Battalion Group captured an intact 9K33 Osa anti-aircraft missile system on 3 October 1987 during the Battle of Cuito Cuanavale. This was the first time that such a system had ever fallen into the hands of non-Warsaw Pact forces, giving Western intelligence agencies an opportunity to examine an important Soviet-bloc weapon system.^[11]

Iraq used Osa systems during the 1991 Gulf War.

The system also saw use in the 2008 Russo-Georgian War by both the Georgian and Russian militaries.

Libyan 9K33 Osa were used, and some destroyed during the 2011 Libyan Civil War by NATO airstrikes.^[12]

Yemeni Civil War

On 29 November 2019, Russian sources speculated that a Soviet made 9K33 Osa fired by Houthi forces shot down a Saudi Arabian Army Aviation AH-64 Apache.^[13][14] Neither Yemen nor Iran had any 9K33 Osa in their armed forces, while known Houthis' operated systems are based on the Soviet made surface-to-air 2K12 Kub which employs a two-stage rocket engine and the air-to-air missiles R-73 and R-27T which both have a single stage rocket engine.^[15]

2020 Nagorno-Karabakh conflict

The Armenian Air Defense extensively employed 9K33 Osa missile systems during the 2020 Nagorno-Karabakh conflict. During the opening days of the war, several videos released by the Azerbaijani military showed several Armenian 9K33 Osa and 9K35 Strela-10 vehicles destroyed by Bayraktar TB2 armed drones,^[16][17] with a number of them destroyed in the following weeks when found on the battlefield.^[18] Twelve 9K33 Osa missile systems of Armenian Army were destroyed during the Nagorno-Karabakh conflict by Azerbaijani Bayraktar TB2s.^[19] On 4 October 2020, an Azerbaijani Air force Sukhoi Su-25 aircraft was shot down, by Armenian forces, probably by a 9K33 Osa while targeting Armenian positions in Fuzuli. The pilot, Col. Zaur Nudiraliyev, died in the crash. Azerbaijani officials acknowledged the loss in December 2020,^[20][21] with the 9K33 Osa vehicle possibly using passive detection and shoot and scoot tactics to survive the Azerbaijani suppression of air defenses missions.^[22]

Russo-Ukrainian War

 

Ukrainian 9K33 Osa launcher destroyed during the 2022 Russian invasion.

Both Russia and Ukraine have 9K33 Osa systems in their inventory.

On 30 March 2019, during the war in Donbas, the Ukrainian Joint Forces reported destruction of an Osa-AKM surface-to-air missile system along with a Zhitel R330Zh automatic jamming system.^[23]

For the main phase of hostilities starting in spring 2022 and as of 20 September 2023, 15 losses of 9K33s by Russia are documented with photos or video. Of these, 8 were destroyed, 2 were damaged, 1 was abandoned, and 4 were captured by the Ukrainians.^[24]

On 23 March 2022, following the Russian invasion, The Washington Post reported that the United States was sending additional systems to Ukraine.^[25]

Command post

PPRU-M1 (PPRU-M1-2) is a mobile command center for a mixed grouping of air defense forces, such as 9K33 Osa and the Tor missile system, 9K22 Tunguska, 9K35 Strela-10 and 9K38 Igla.^[26]

Upgrades

Belarus

 

T38 Stilet

• The 9K33-1T "Osa-1T" was developed by UE "Tetraedr" from Belarus. A SAM system comprises combat assets and technical support means, including
  • the 9А33-1Т TELAR or "Combat Vehicle" (CV), based on the original BAZ-5937 (or the new MZKT-69222) and equipped with a new day/night camera system OES-1T instead of the original day-only 9Sh33 or 9Sh38-2 "Karat";
  • the 9M33M2 or -3 SAMs, or the new 9M33M3-1 with a range of 20 km;
  • the 9Т217-1T Transportation and Loading Vehicle (TLV);
  • the 9V210-1T Maintenance Vehicle (MV);
  • the 9V214-1T Alignment Vehicle (AV);
  • the 9V242-1T Automatic Mobile Check-up and Testing Station (AKIPS) and
  • the 9F16M2 Ground Equipment Kit (GEK).^[27][28][29]
• The T38 "Stilet" is a further development of the Osa-1T. Main components are the TELAR T381 on MZKT-69222 chassis and the new missile T382. Maximum range of targets' destruction 20 km, minimal RCS of targets detected 0.02 m².^[30]

Poland

• Osa-AKM-P1 "Żądło" (export name SA-8P Sting) is a Polish upgrade of the 9K33M2 "Osa-AK" and 9K33M3 "Osa-AKM". Probably 32 of the 64 systems purchased from the Soviet Union have been upgraded. An upgraded TELAR 9A33BM3-P1 was displayed at the MSPO 2004 exhibition in Kielce, Poland. The upgraded vehicle is fitted with a passive detection and identification system SIC 12/TA as well as the ISZ-01 IFF system.^[31][32]

In 2019 Poland started modification of the whole environment of the Osa system. Those works has been commissioned to WZU Grudziądz. The total cost is about €40-50 million.^{[33][34][35][36]}

Operators

 

A map of 9K33 operators in blue with former operators in red

 

Armenian 9K33 Osa missiles during a military parade in Yerevan

 

A Romanian 9K33 Osa missile launch at the Capu Midia firing range.

Current operators

•   Algeria – 28/48^[37] 48+^[38]
•   Angola – 15 units^[39]
•   Armenia
•   Azerbaijan – Upgraded to Osa-1T^[40]
•   Belarus
•   Bulgaria
•   Cuba
•   Ecuador
•   Georgia
•   Greece – 39 systems, 120 cvs in 6 batteries
•   India – OSA-AK in service

 

An Indian 9K33 Osa missile system in Delhi during a military parade

•   Iran
•   North Korea
•   Morocco
•   Romania – 16 launchers and 8 reloaders (one regiment in service since 1989)
•   Russia – 400^[41] Since 2007 the Osa-AKM system has modernized and fitted with protection against spoofing^[42]
•   Sahrawi Arab Democratic Republic^[43]
•   Sudan^[44]
•   Syria – 14 batteries, composed of 60 independent and autonomous fighting vehicles^[45][46]
•   Turkmenistan – 40^[47]
•   Ukraine – Osa-AK and Osa-AKM in service^[48][49]

Former operators

•   Artsakh − Seized by Azerbaijan after the 2023 Nagorno-Karabakh clashes^[50]
•   Czechoslovakia – One regiment which passed to the Czech Republic.
•   Czech Republic – Phased out in 2006.
•   East Germany – 41 Osa-AK. Partially sold to Greece after the German reunification.
•   Iraq – 50 systems delivered from the Soviet Union between 1982 and 1985.^[51] As well as captured Kuwaiti units.
•   Jordan – retired in 2017, 52 offered for sale.^[52] 35 Osa-AKs sold to Armenia before 2020.^[53]
•   Kuwait – Purchased in the late 1980s.^[54] Captured by the Iraqi forces in the Gulf War.
•   Libya – 40 used by the Army and 50 by the Air Defense Command in 1992,^[55] unknown number operational prior to the 2011 Libyan civil war.^[56]
•   Poland – 64. Probably 32 systems upgraded to Osa-AKM-P1 to keep them in service until 2017.^[31]
•   Soviet Union – Passed on to successor states.

References

• Federation of American Scientists page 19 February 2013 at the Wayback Machine
• Astronautix.com 12 February 2005 at the Wayback Machine
• ROSOBORONEXPORT 28 September 2011 at the Wayback Machine

Notes

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2. Visegrád 24 [@visegrad24] (1 March 2022). (Tweet). Archived from the original on 1 March 2022 – via Twitter.{{cite web}}: CS1 maint: numeric names: authors list (link)
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4. . Archived from the original on 24 May 2013. Retrieved 28 March 2012.
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7. "SA-8 GECKO / 9K33M3 Osa-AKM". www.globalsecurity.org. Retrieved 4 January 2021.
8. "9K33M3 Osa-AKM". from the original on 19 February 2013. Retrieved 13 July 2008..
9. McCarthy, Don (14 November 2013). The Sword of David: The Israeli Air Force at War. ISBN 978-1-78159-290-8.
10. George, Edward in: The Cuban Intervention in Angola, 1965–1991, Frank Cass, London, New York, 2005, ISBN 0-415-35015-8, p. 236-237
11. Turton, A.R. 2010. Shaking Hands with Billy. Durban: Just Done Publications.
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16. "Azerbaijan used TB2 drone to destroy twelve 9K33 Osa short-range anti-aircraft systems of Armenia". 27 September 2020. Retrieved 4 January 2021.
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19. GDC (27 September 2020). "Azerbaijan used TB2 drone to destroy twelve 9K33 Osa short-range anti-aircraft systems of Armenia". Global Defense Corp. Retrieved 15 July 2021.
20. "Əsir düşməmək üçün "Su-25" döyüş təyyarəsini düşmən səngərinə çırpan şəhid polkovnik Zaur Nudirəliyev VİDEO" (in Azerbaijani). 27 December 2020.
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33. "Usługi - 153124-2019 - TED Tenders Electronic Daily". ted.europa.eu. Retrieved 4 January 2021.
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External links

 

Wikimedia Commons has media related to Osa surface-to-air missile system.

• 9K33M2 OSA-AK (SA-8B Gecko) Simulator