Jump to content

Loitering munition

This is a good article. Click here for more information.
From Wikipedia, the free encyclopedia

This is an old revision of this page, as edited by 36.71.137.65 (talk) at 12:06, 4 December 2022 (Users and producers). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

A loitering munition (also known as a suicide drone[1][2][3][4] or kamikaze drone[5][6][7]) is an aerial weapon system category in which the munition loiters (waits passively) around the target area for some time and attacks only once a target is located.[8][9][10] Loitering munitions enable faster reaction times against concealed or hidden targets that emerge for short periods without placing high-value platforms close to the target area, and also allow more selective targeting as the attack can easily be aborted.

Loitering munitions fit in the niche between cruise missiles and unmanned combat aerial vehicles (UCAVs), sharing characteristics with both. They differ from cruise missiles in that they are designed to loiter for a relatively long time around the target area, and from UCAVs in that a loitering munition is intended to be expended in an attack and has a built-in warhead. As such, they can also be considered a nontraditional ranged weapon.

Loitering weapons first emerged in the 1980s for use in the Suppression of Enemy Air Defenses (SEAD) role against surface-to-air missiles (SAMs), and were deployed for the SEAD role in a number of military forces in the 1990s. Starting in the 2000s, loitering weapons have been developed for additional roles ranging from relatively long-range strikes and fire support down to tactical, very short range battlefield systems that fit in a backpack.

History

First development and terminology

Northrop AGM-136 Tacit Rainbow on display at the National Museum of the U.S. Air Force in Dayton, Ohio

Initially, loitering munitions were not referred to as such but rather as 'suicide UAVs' or 'loitering missiles'. Different sources point at different projects as originating the weapon category. The early 1980s initial Israeli Delilah variants[11][12] or the failed US AGM-136 Tacit Rainbow program[13][14] are mentioned by some sources. Alternatively, the late 1980s IAI Harpy which was widely exported is considered by some as the first loitering munition system.[15] Whereas the Iranian Ababil-1 was produced in the 1980s but its exact production date is unknown.[16]

IAI Harpy first-generation loitering munition for SEAD role

Early projects did not use the "loitering munition" nomenclature that emerged much later, and used terminology existing at the time. For instance the AGM-136 Tacit Rainbow was described in a 1988 article:

the Tacit Rainbow unmanned jet aircraft being developed by Northrop to loiter on high and then swoop down on enemy radars could be called a UAV, a cruise missile, or even a standoff weapon. But it is most definitely not an RPV.

Initial role in suppression of enemy air defense

Loitering Munitions HERO (UVision Air Ltd, Israel), DSEI 2019, London

The response to the first generation of fixed installation surface-to-air missiles (SAMs) such as S-75 and S-125 was the development of the anti-radiation missile such as AGM-45 Shrike and other means to attack fixed SAM installations, as well as developing SEAD doctrines. The Soviet counter-response was the use of mobile SAMs such as 2K12 Kub with intermittent use of radar.[17] Thus, the SAM battery was only visible for a small period of time, during which it was also a significant threat to high-value Wild Weasel fighters. In 1982 Operation Mole Cricket 19 various means including UAVs and air-launched Samson decoys were used over suspected SAM areas to saturate enemy SAMs and to bait them to activate their radar systems, which were then attacked by anti-radiation missiles.[18][19]

In the 1980s, a number of programs, such as the IAI Harpy or the AGM-136 Tacit Rainbow, integrated anti-radiation sensors into a drone or missile air frames coupled with command and control and loitering capabilities. This allowed the attacking force to place relatively cheap munitions in place over suspected SAM sites, and to attack promptly the moment the SAM battery is visible. This integrated the use of a drone as a baiting decoy with the attack role into one small and relatively cheap platform in comparison to the alternative wild weasel jet fighter.[20][21][22][23]

Evolution into additional roles

XM501 US prototype capable of launching LAM (loitering attack munition)

Starting in the 2000s, loitering weapons have been developed for additional roles beyond the initial SEAD role ranging from relatively long-range strikes and fire support[24] down to tactical, very short-range battlefield use such as the AeroVironment Switchblade which is deployed at the platoon level and fits in a backpack.[25][26][27][28] A documented use of loitering munitions was in 2016 Nagorno-Karabakh conflict in which an IAI Harop was used against a bus functioning as a troop transport for Armenian soldiers.[7]

Characteristics

Air-launched Delilah loitering munition, controlled by backseat WSO

Loitering munitions may be as simple as an unmanned aerial vehicle (UAV) with attached explosives that is sent on a potential kamikaze mission, and may even be constructed with off the shelf commercial quadcopters with strapped on explosives.[29]

Purpose-built munitions are more elaborate in flight and control capabilities, warhead size and design, and on-board sensors for locating targets.[30] Some loitering munitions use a human operator to locate targets whereas others, such as IAI Harop, can function autonomously searching and launching attacks without human intervention.[31][32] Another example is UVision HERO solutions – the loitering systems are operated remotely, controlled in real time by a communications system and equipped with an electro-optical camera whose images are received by the command and control station.[33][34]

Some loitering munitions may return and be recovered by the operator if they are unused in an attack and have enough fuel; in particular this is characteristic of UAVs with a secondary explosive capability.[35] Other systems, such as the Delilah[11][36][10] don't have a recovery option and are self-destructed in mission aborts.

Countermeasures

Comparison to similar weapons

Loitering munitions fit in the niche between cruise missiles and unmanned combat aerial vehicles (UCAVs).[10][37]

The following table compares similar size-class cruise missiles, loitering munitions, and UCAVS:

Characteristic Cruise missile Loitering munition UCAV
Cost appropriate for expendable one-time use Yes Yes No, but high cost allows for higher-quality platform
Recovery possible after launch No Usually no Yes, typical mission profile is round-trip
Built-in warhead Yes Yes No
Stealthy final dive to target Usually yes Usually yes Usually no
Loitering No or limited Yes Usually yes
Sensors for target acquisition Limited Yes Usually yes
Command and control during flight Usually limited Yes Yes
Range Longer, optimized for constant speed flight Shorter Shorter, even shorter for typical round-trip mission
Speed Typically higher Typically lower Depends on role
Example type
Block IV Tomahawk cruise missile. Its small wing area is optimized for high-speed cruise.
IAI Harop, a loitering munition optimized for the Suppression of Enemy Air Defenses (SEAD) role
General Atomics MQ-1 Predator UCAV
Range 1,600 km 1,000 km 1,100 km
Max speed high sub-sonic, 880 km/h 190 km/h 217 km/h
Flight endurance c. 2 hours 6 hours 24 hours
Engine 3.1 kilonewtons (700 lbf) F107-WR-402 turbofan engine 37 hp (28 kW) Wankel engine 115 hp (86 kW) Rotax 914F
Loaded system weight 1,588 kg 135 kg 1,020 kg
Payload 450 kg warhead 23 kg warhead up to 204 kg
(2 × AGM-114 Hellfire or 6 × AGM-176 Griffin air-to-surface missiles)
Length 6.25 m 2.5 m 8.22 m
Wingspan 2.67 m [38] 3.0 m [30] 16.8 m [39]

Whereas some cruise missiles, such as the block IV Tomahawk, have the ability to loiter and have some sensory and remote control features,[40] their primary mission is typically strike and not target acquisition. Cruise missiles, as their name implies, are optimized for long-range flight at constant speed both in terms of propulsion systems and wings or lifting body design. They are often unable to loiter at slow fuel-efficient speeds which significantly reduces potential loiter time even when the missile has some loiter capabilities.[41]

Conversely almost any UAV could be piloted to crash onto a target and most could be fitted with an improvised explosive warhead.[29] However the primary use of a UAV or UCAV would be for recoverable flight operations carrying reconnaissance equipment and/or munitions. While many UAVs are explicitly designed with loitering in mind, they are not optimized for a diving attack, often lacking forward facing cameras, lacking in control response-speed which is unneeded in regular UAV flight, and are noisy when diving, potentially providing warning to the target. UAV's, being designed as multi-use platforms, often have a unit cost that is not appropriate for regular one-time expendable mission use.[42][37]

NCSIST Chien Hsiang, an example of an expendable loitering munition

The primary mission of a loitering munition is reaching the suspected target area, target acquisition during a loitering phase, followed by a self-destructive strike, and the munition is optimized in this regard in terms of characteristics (e.g. very short engine life time, silence in strike phase, speed of strike dive, optimization toward loitering time instead of range/speed) and unit cost (appropriate for a one-off strike mission).[43][44]

Ethical and international humanitarian law concerns

Loitering munitions that are capable of making autonomous attack decisions (man out of the loop) raise moral, ethical, and international humanitarian law concerns because a human being is not involved in making the actual decision to attack and potentially kill humans, as is the case with fire-and-forget missiles in common use since the 1960s. Whereas some guided munitions may lock-on after launch or may be sensor fuzed, their flight time is typically limited and a human launches them at an area where enemy activity is strongly suspected, as is the case with modern fire-and-forget missiles and airstrike planning. An autonomous loitering munition, on the other hand, may be launched at an area where enemy activity is only probable, and loiter searching autonomously for targets for potentially hours following the initial launch decision, though it may be able to request final authorization for an attack from a human. The IAI Harpy and IAI Harop are frequently cited in the relevant literature as they set a precedent for an aerial system (though not necessarily a precedent when comparing to a modern naval mine) in terms of length and quality of autonomous function, in relation to a cruise missile for example.[45][46][47][48][49][50]

Users and producers

As of 2022, loitering munitions are used by the armed forces of several countries, including:

Indigenous manufacture of additional types by Israel Aerospace Industries,[69] UVision Air,[70][71][72][73][74][75] Aeronautics Defense Systems,[76] Elbit Systems,[77] Rafael Advanced Defense Systems and Israel Military Industries[78]

See also

References

  1. ^ US army may soon use Israeli-designed ‘suicide drones’, Jerusalem Post, June 2016
  2. ^ China Unveils a Harpy-Type Loitering Munition, Israel Defense, March 2017
  3. ^ Meet Israel’s ‘Suicide Squad’ of Self-Sacrificing Drones, The Drive, August 2016
  4. ^ Loitering Munitions – In Focus, Center for the Study of the Drone, Feb 2017
  5. ^ Kamikaze drone loiters above, waits for target, CNET, June 2009
  6. ^ 'Kamikaze drones' add a new layer of lethality to remote force Archived 19 September 2015 at the Wayback Machine, C4ISRNET, August 2015
  7. ^ a b c Israeli-made kamikaze drone spotted in Nagorno-Karabakh conflict, Washington Post, April 2016
  8. ^ Loitering Munition Availability Expanding Internationally, Aviation Week, April 2016
  9. ^ Loitering Weapon Systems – A Growing Demand, h-ils, December 2016
  10. ^ a b c Watch This Drone Turn Into A Missile, Popular Science, August 2015
  11. ^ a b The Secrets of Delialah (Hebrew), IAF bulletin, issue 184, December 2008
  12. ^ Loitering Weapons are making a Comeback, Defense Update, June 2009
  13. ^ An Introduction to Autonomy in Weapon Systems, pages 13–14, By: Paul Scharre and Michael C. Horowitz, CNAS Working paper, Feb 2015
  14. ^ Canan, James W. "Unmanned Aerial Vehicles." Air Force Magazine (1988)., page 87
  15. ^ Drone Strike!: UCAVs and Aerial Warfare in the 21st Century, By Bill Yenne, ISBN 9781580072526, pages 106–107
  16. ^ دور, موسسه پرنده های هدایت پذیر از. "چهارمین قدرت پهپادی دنیا ؛ از سینما تا جهان نما". موسسه پرنده های هدایت پذیر از دور.
  17. ^ Reedy, Edward K. (1 January 1987). "Radar ECCM Considerations and Techniques". In Eaves, Jerry L.; Reedy, Edward K. (eds.). Principles of Modern Radar. Springer US. pp. 681–699. doi:10.1007/978-1-4613-1971-9_22. ISBN 978-1-4612-9170-1.
  18. ^ Six Days in June (Hebrew), IAF bulletin, issue 145, June 2002
  19. ^ Surface to Air Missile Effectiveness in Past Conflicts, Technical Report APA-TR-2010-1001, Dr Carlo Kopp, AFAIAA, SMIEEE, PEng, October 2010
  20. ^ Meet Israel's 'Suicide Squad' of Self-Sacrificing Drones, August 2016, The Drive
  21. ^ ADAPTIVE DISCRETE EVENT SIMULATION FOR ANALYSIS OF HARPY SWARM ATTACK, Brandon J. Cobb, Naval Postgraduate School, Thesis, September 2011
  22. ^ "Suminsby, Robert E. Fear no Evil: Unmanned combat air vehicles for suppression of enemy air defenses. AIR UNIV MAXWELL AFB AL AEROSPACE STUDIES INST, 2002" (PDF). Archived from the original on 12 April 2017.
  23. ^ Loitering, Smart Cruise Missile Marketed to U.S. Navy, National Defense, June 2001
  24. ^ British Army Sets to Deploy Fire Shadow Loitering Weapons to Afghanistan by Early 2012 Defense Update, September 2011
  25. ^ Military Investigates Killer Drones That Can Fit in Rucksacks National Defense, July 2011
  26. ^ A Tiny Missile That Waits Overhead—Silent, Patient and Deadly, WarIsBoring, January 2014
  27. ^ AeroVironment producing Switchblade missiles for Army UPI, October 2016
  28. ^ Loitering Autonomous Weapons Archived 2013-02-05 at the Wayback Machine, Defense Update, January 2007
  29. ^ a b ISIS Using Kamikaze Drones in Iraq, Popular Mechanics, October 2016
  30. ^ a b iClean – Loitering Attack UCAV, Artzi Dror, Technion Institute of Technology, 2012
  31. ^ Israel Unveils Loitering Anti-Missile Drone Archived 2018-03-15 at the Wayback Machine, Defense Update, 2009
  32. ^ Harpy Air Defense Suppression System Archived 2017-12-11 at the Wayback Machine, Defense Update, 2006
  33. ^ "Loitering Munitions – High Precision Systems". UVision. Retrieved 1 September 2021.
  34. ^ "Unmanned Aerial Loitering Systems for Various Missions". UVision. Retrieved 1 September 2021.
  35. ^ IAI's ROTEM – Tactical Multirotor Killer Drone, Defense Update, 2016
  36. ^ Delilah – The IAF Loitering Missile, Defense Update, June 2009
  37. ^ a b Gilli, Andrea, and Mauro Gilli. "The Diffusion of Drone Warfare? Industrial, Organizational and Infrastructural Constraints: Military Innovations and the Ecosystem Challenge." (2015)., pages 21–22, 25–31
  38. ^ RGM/UGM-109 Tomahawk, fi-aeroweb, November 2014
  39. ^ MQ-1B Predator factsheet, US Air Force, July 2010
  40. ^ The U.S. Navy Has Big Plans for the Lethal Tomahawk Missile, The National Interest, Kris Osborn, 18 May 2016
  41. ^ Takahashi, Timothy, et al. "A multi-disciplinary survey of advanced subsonic tactical cruise missile configurations." 43rd AIAA Aerospace Sciences Meeting and Exhibit. 2005.
  42. ^ "Franklin, Michael. "Unmanned combat air vehicles: opportunities for the guided weapons industry?." RUSI Occasional Paper, www. rusi. org/downloads/assets/Unmanned_Combat_Air_Vehicles. pdf (29.3. 2011) (2008)" (PDF). RUSI.org. Retrieved 15 June 2017.
  43. ^ "Liu, Xuancen, et al. "Optimal Design of Loitering Munition Trajectory in Complex Battlefield Environment." (2016)". Atlantis Press.
  44. ^ Snyder, Derek J. (25 April 2017). "Design Requirements for Weaponizing Man-Portable UAS in Support of Counter-Sniper Operations". Archived from the original on 10 April 2017 – via Defense Technical Information Center.
  45. ^ Garcia, Denise. "Killer robots: Why the US should lead the ban." Global Policy 6.1 (2015): 57–63.
  46. ^ Sharkey, Noel. "Saying 'no!' to lethal autonomous targeting." Journal of Military Ethics 9.4 (2010): 369–383.
  47. ^ "Mortensen, Erika Steinholt. Autonomous weapon systems that decide whom to kill. How international humanitarian law and international human rights law regulate the development and use of offensive autonomous weapon systems during international armed conflicts. MS thesis. UiT Norges arktiske universitet, 2016" (PDF).
  48. ^ Alston, Philip. "Lethal robotic technologies: the implications for human rights and international humanitarian law." JL Inf. & Sci. 21 (2011): 35.
  49. ^ "Crootof, Rebecca. "The Varied Law of Autonomous Weapon Systems." (2015)" (PDF).[dead link]
  50. ^ Evan Wallach and Erik Thomas (2016). "The Economic Calculus of Fielding Autonomous Fighting Vehicles Compliant with the Laws of Armed Conflict" (PDF). Yale Journal of Law & Technology. 18: 1–25.
  51. ^ "Armenian manufacturer boasts cutting-edge multifunctional combat UAVs and loitering munitions". armenpress.am. Retrieved 19 July 2020.
  52. ^ A drone with a can-doom attitude. C4ISRNET. 5 June 2019.
  53. ^ "STM'nin yerli kamikaze İHA'sı KARGU Azerbaycan'da görüldü" (in Turkish). 29 October 2020.
  54. ^ "İlk kez Libya'da kullanılmıştı! Bu kez Azerbaycan'da görüntülendi" (in Turkish). CNN Türk. 28 September 2020.
  55. ^ "ADEX 2022: Smart Point unveils 'attack' UAVs". Janes Information Services. 10 September 2022. Archived from the original on 11 September 2022.
  56. ^ "Belarus-made armed drone shot down in Ukraine". defence-blog.com. 11 July 2022.
  57. ^ DSA 2016: China details CH-901 UAV and loitering munition, Janes, April 2016
  58. ^ IDEX 2017: CATIC reveals details about Harpy-type loitering munition, Janes, March 2017
  59. ^ ".: Dahana".
  60. ^ Harop Loitering Munitions System for the IAF, India Defence Review, January 2014
  61. ^ "Laser weapons, swarm drones on DRDO menu". The Hindu. Special Correspondent. 12 August 2019. ISSN 0971-751X. Retrieved 11 August 2020.{{cite news}}: CS1 maint: others (link)
  62. ^ PUBBY, MANU (22 September 2022). "Indigenous loitering munition successfully hits target at Pokhran". The Economic Times. New Delhi. Retrieved 23 September 2022.
  63. ^ Iran's navy touts 'suicide drone', USA Today, October 2016
  64. ^ Iran Tests 'Kamikaze' Suicide Drone, The National Interest,Papers Offer a Peek at ISIS' Drones, Lethal and Largely Off-the-Shelf, New York Times, January 2017
  65. ^ Portable Attack Drones or Loitering Munitions, SP'S Landforces, September 2016
  66. ^ US Switchblade Drone ‘Knock Off’ Meraj-521 Unveiled By Iran; Comes After Grand Success Of Its UAVs In Ukraine. EurAsian Times. 21 October 2022.
  67. ^ Elbit announces new SkyStriker loitering munition Yaakov Lappin, Tel Aviv – IHS Jane's Defence Weekly 8 September 2016
  68. ^ AI-driven combat drone can search buildings and execute suicide attacks. New Atlas. 20 November 2022.
  69. ^ SINGAPORE: IAI reveals new family of loitering munitions, FlightGlobal, February 2016
  70. ^ UVision loitering munitions to undergo anti-tank testing, Flight Global, April 2016
  71. ^ Israeli companies pitching loitering munitions for US Army programme, FlightGlobal, April 2016
  72. ^ Soylu, Ragip (25 March 2021). "US Army, Marines, Special Forces Eye Israeli 'Hero' Attack Drones". Breaking Defense. Retrieved 1 September 2021.
  73. ^ Trevithick, Joseph (23 June 2021). "Marines Pick Loitering Munition To Arm Light Vehicles And Drone Boats". The Drive. Retrieved 1 September 2021.
  74. ^ "Israeli UVision to Supply Hero-120 Loitering Munition to U.S. Marine Corps". www.defenseworld.net. 21 June 2021. Retrieved 1 September 2021.
  75. ^ "Loitering ammunition in Special Operations Forces - Defence24.com". defence24.com. Retrieved 1 September 2021.
  76. ^ Aeronautics introduces Orbiter 1K loitering munition, FlightGlobal, May 2015
  77. ^ Elbit announces new SkyStriker loitering munition, Jane's Defence Weekly, September 2016
  78. ^ Vietnam Eyes Israel's Delilah Standoff Missile, and F-16s Could Be Next, The Warzone, March 2017
  79. ^ Warmate expendable UAV in production for two customers, Flight Global, April 2016
  80. ^ Под крышей дрона: ВМФ усиливается БПЛА-камикадзе, Izvestia, 20 October 2021
  81. ^ Russian Naval Ships to Be Armed With Kamikaze Drones, The Defense Post, 2 November 2021
  82. ^ "Russia Attacked U.S. Supplied Howitzers in Ukraine With Kamikaze Drones and Rockets". 19 May 2022.
  83. ^ Serbia may become biggest operator of military drones in Balkans. Defense News. 21 November 2022.
  84. ^ South Korea's Kamikaze UAV Could Scare the Ojom Out of Kim Jong-un, Gizmodo, October 2012
  85. ^ South Korea developing 'kamikaze' attack drone, Fox News, October 2012
  86. ^ Wong, Kelvin. "TADTE 2019: Taiwan's NCSIST rolls out indigenous anti-radiation loitering munition". www.janes.com. Janes. Retrieved 21 October 2019.
  87. ^ IAI Gets $100 Million Contract for HAROP Killer Drones Archived 20 July 2017 at the Wayback Machine, Defense Update, 2009
  88. ^ "Turkey's STM delivering Kargu loitering munitions to TSK | Jane's 360". www.janes.com. Retrieved 23 March 2020.
  89. ^ "ALPAGU® Fixed Wing Loitering Munition System". stm.com.tr.
  90. ^ "Turkish firms develop kamikaze drone designed to neutralise drone-borne threats". unmannedairspace.info. 29 October 2021.
  91. ^ "LENTATEK Unveils KARGI Anti-Radiation UAV For the First Time". turkishdefencenews.com. 6 June 2022.
  92. ^ "STM and Roketsan from Türkiye unveil new Alpagut loitering munition". armyrecognition.com. 28 October 2022.
  93. ^ Turkish firms unveil a new loitering munition. Defense News. 28 October 2022.
  94. ^ ADASI EDGE presents QX-1 new loitering munition fully developed in UAE. Army Recognition. 9 April 2021.
  95. ^ Edge Group unveils kamikaze drones at IDEX. Defense News. 22 February 2021.
  96. ^ HALCON EDGE from UAE has designed Shadow jet-engine powered UAVs loitering munitions. Army Recognition. 9 April 2021.
  97. ^ As UAV tech spreads, Gulf firms bet on upgrades with drone-to-satellite links. Breaking Defense. 3 June 2022.
  98. ^ HALCON from UAE unveils RW-24 Smart Loitering Precision Attack munitions. Army Recognition. 10 May 2021.
  99. ^ Surface Navy 2017: Coyote earmarked for ISR and offensive roles, Janes, January 2017
  100. ^ Suicide Drones Have Migrated To The Conflict In Yemen, The Warzone, March 2017