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A precision-guided munition (PGM, smart weapon, smart munition, smart bomb) is a guided
munition Ammunition (informally ammo) is the material fired, scattered, dropped, or detonated from any weapon or weapon system. Ammunition is both expendable weapons (e.g., bombs, missiles, grenades, land mines) and the component parts of other weapo ...
intended to precisely hit a specific target, to minimize
collateral damage Collateral damage is any death, injury, or other damage inflicted that is an incidental result of an activity. Originally coined by military operations, it is now also used in non-military contexts. Since the development of precision guided ...
and increase
lethality Lethality (also called deadliness or perniciousness) is how capable something is of causing death. Most often it is used when referring to diseases, chemical weapons, biological weapons, or their toxic chemical components. The use of this te ...
against intended targets. During the First Gulf War guided munitions accounted for only 9% of weapons fired, but accounted for 75% of all successful hits. Despite guided weapons generally being used on more difficult targets, they were still 35 times more likely to destroy their targets per weapon dropped. Because the damage effects of
explosive weapon An explosive weapon is a weapon that uses high explosive to project blast and/or fragmentation from a point of detonation. In the common practice of states, explosive weapons are generally the preserve of the military, for use in situations of ...
s decrease with distance due to an inverse cube law, even modest improvements in accuracy (hence reduction in miss distance) enable a target to be attacked with fewer or smaller bombs. Thus, even if some
guided bomb A guided bomb (also known as a smart bomb, guided bomb unit, or GBU) is a precision-guided munition designed to achieve a smaller circular error probable (CEP). The creation of precision-guided munitions resulted in the retroactive renaming of ...
s miss, fewer air crews are put at risk and the harm to civilians and the amount of collateral damage may be reduced. The advent of precision-guided munitions resulted in the renaming of older, low-technology, bombs as "
unguided bomb An unguided bomb, also known as a free-fall bomb, gravity bomb, dumb bomb, or iron bomb, is a conventional or nuclear aircraft-delivered bomb that does not contain a guidance system and hence simply follows a ballistic trajectory. This descri ...
s", "dumb bombs", or "iron bombs".


Types

Recognizing the difficulty of hitting moving ships during the
Spanish Civil War The Spanish Civil War ( es, Guerra Civil Española)) or The Revolution ( es, La Revolución, link=no) among Nationalists, the Fourth Carlist War ( es, Cuarta Guerra Carlista, link=no) among Carlism, Carlists, and The Rebellion ( es, La Rebeli ...
, the Germans were first to develop steerable munitions, using radio control or wire guidance. The U.S. tested TV-guided (
GB-4 GB-4 (Glide Bomb No.4) was a precision guided munition developed by the United States during World War II. GB-4s used a television guidance system with the weapon being steered by a TV bombardier operating a joystick in the launch aircraft. Th ...
),
semi-active radar Semi-active radar homing (SARH) is a common type of missile guidance system, perhaps the most common type for longer-range air-to-air and surface-to-air missile systems. The name refers to the fact that the missile itself is only a passive det ...
-guided ( Bat), and
infrared Infrared (IR), sometimes called infrared light, is electromagnetic radiation (EMR) with wavelengths longer than those of visible light. It is therefore invisible to the human eye. IR is generally understood to encompass wavelengths from aroun ...
-guided ( Felix) weapons.


Inertial-guided weapons

The
CBU-107 Passive Attack Weapon The CBU-107 Passive Attack Weapon is an air-dropped guided bomb containing metal penetrator rods of various sizes. It was designed to attack targets where an explosive effect may be undesirable, such as fuel storage tanks or chemical weapon stockp ...
is an air-dropped
guided bomb A guided bomb (also known as a smart bomb, guided bomb unit, or GBU) is a precision-guided munition designed to achieve a smaller circular error probable (CEP). The creation of precision-guided munitions resulted in the retroactive renaming of ...
containing metal penetrator rods of various sizes. It was designed to attack targets where an explosive effect may be undesirable, such as
fuel A fuel is any material that can be made to react with other substances so that it releases energy as thermal energy or to be used for work. The concept was originally applied solely to those materials capable of releasing chemical energy bu ...
storage tank Storage tanks are containers that hold liquids, compressed gases (gas tank; or in U.S.A "pressure vessel", which is not typically labeled or regulated as a storage tank) or mediums used for the short- or long-term storage of heat or cold. The t ...
s or
chemical weapon A chemical weapon (CW) is a specialized munition that uses chemicals formulated to inflict death or harm on humans. According to the Organisation for the Prohibition of Chemical Weapons (OPCW), this can be any chemical compound intended as ...
stockpile A stockpile is a pile or storage location for bulk materials, forming part of the bulk material handling process. Stockpiles are used in many different areas, such as in a port, refinery or manufacturing facility. The stockpile is normally cre ...
sAir Force Developed Bombs Capable of Destroying Syria’s Chemical Weapons
- Defensetech.org, 30 August 2013
in
civilian Civilians under international humanitarian law are "persons who are not members of the armed forces" and they are not " combatants if they carry arms openly and respect the laws and customs of war". It is slightly different from a non-combatan ...
areas.


Radio-controlled weapons

The Germans were first to introduce PGMs in combat, with KG 100 deploying the MCLOS-guidance
Fritz X Fritz X was the most common name for a German guided anti-ship glide bomb used during World War II. ''Fritz X'' was the world's first precision guided weapon deployed in combat and the first to sink a ship in combat. ''Fritz X'' was a nickname us ...
armored
glide bomb A glide bomb or stand-off bomb is a standoff weapon with flight control surfaces to give it a flatter, gliding flight path than that of a conventional bomb without such surfaces. This allows it to be released at a distance from the target r ...
, guided by the ''Kehl-Straßburg'' radio guidance system, to successfully attack the Italian battleship ''Roma'' in 1943, and the similarly ''Kehl-Straßburg'' MCLOS-guided
Henschel Hs 293 The Henschel Hs 293 was a World War II German radio-guided glide bomb. It is the first operational anti-shipping missile, first used unsuccessfully on 25 August 1943 and then with increasing success over the next year, ultimately damaging or ...
rocket-boosted glide bomb (also in use since 1943, but only against lightly armored or unarmored ship targets). The closest Allied equivalents, both unpowered designs, were the VB-1
AZON AZON (or Azon), from " azimuth only", was one of the world's first guided weapons, deployed by the Allies and contemporary with the German Fritz X. Officially designated VB-1 ("Vertical Bomb 1"), it was invented by Major Henry J. Rand and Thoma ...
(from "AZimuth ONly" control), used in both Europe and the CBI theater, and the
US Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage ...
's Bat, primarily used in the Pacific Theater of World War II — the Navy's Bat was more advanced than either German PGM ordnance design or the USAAF's VB-1 AZON, in that it had its own on board, autonomous radar seeker system to direct it to a target. In addition, the U.S. tested the rocket-propelled
Gargoyle In architecture, and specifically Gothic architecture, a gargoyle () is a carved or formed grotesque with a spout designed to convey water from a roof and away from the side of a building, thereby preventing it from running down masonry wall ...
, which never entered service. Japanese PGMs—with the exception of the anti-ship air-launched, rocket-powered, human-piloted
Yokosuka MXY-7 Ohka The Yokosuka MXY-7 was a purpose-built, rocket-powered aircraft, rocket-powered human-guided ''kamikaze'' attack aircraft employed by Japan against Allied ships towards the end of the Pacific War during World War II. Although extremely fast, t ...
, "Kamikaze" flying bomb did not see combat in World War II. Prior to the war, the British experimented with radio-controlled remotely guided planes laden with explosives, such as Larynx. The
United States Army Air Forces The United States Army Air Forces (USAAF or AAF) was the major land-based aerial warfare service component of the United States Army and ''de facto'' aerial warfare service branch of the United States during and immediately after World War II ...
used similar techniques with
Operation Aphrodite Aphrodite and Anvil were the World War II code names of United States Army Air Forces and United States Navy operations to use Boeing B-17 Flying Fortress and Consolidated PB4Y bombers as precision-guided munitions against bunkers and other har ...
, but had few successes; the German Mistel (Mistletoe) "
parasite aircraft A parasite aircraft is a component of a composite aircraft which is carried aloft and air launched by a larger carrier aircraft or mother ship to support the primary mission of the carrier. The carrier craft may or may not be able to later reco ...
" was no more effective, guided by the human pilot flying the single-engined fighter mounted above the unmanned, explosive-laden twin-engined "flying bomb" below it, released in the ''Mistel's'' attack dive from the fighter. The U.S. programs restarted in the
Korean War {{Infobox military conflict , conflict = Korean War , partof = the Cold War and the Korean conflict , image = Korean War Montage 2.png , image_size = 300px , caption = Clockwise from top: ...
. In the 1960s, the ''electro-optical bomb'' (or ''camera bomb'') was reintroduced. They were equipped with
television camera A professional video camera (often called a television camera even though its use has spread beyond television) is a high-end device for creating electronic moving images (as opposed to a movie camera, that earlier recorded the images on film). ...
s and flare sights, by which the bomb would be steered until the flare superimposed the target. The camera bombs transmitted a "bomb's eye view" of the target back to a controlling aircraft. An operator in this aircraft then transmitted control signals to steerable fins fitted to the bomb. Such weapons were used increasingly by the
USAF The United States Air Force (USAF) is the Aerial warfare, air military branch, service branch of the United States Armed Forces, and is one of the eight uniformed services of the United States. Originally created on 1 August 1907, as a part ...
in the last few years of the
Vietnam War The Vietnam War (also known by #Names, other names) was a conflict in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. It was the second of the Indochina Wars and was officially fought between North Vie ...
because the political climate was increasingly intolerant of civilian casualties, and because it was possible to strike difficult targets (such as bridges) effectively with a single mission; the Thanh Hoa Bridge, for instance, was attacked repeatedly with iron bombs, to no effect, only to be dropped in one mission with PGMs. Although not as popular as the newer JDAM and JSOW weapons, or even the older
laser-guided bomb A laser-guided bomb (LGB) is a guided bomb that uses semi-active laser guidance to strike a designated target with greater accuracy than an unguided bomb. First developed by the United States during the Vietnam War, laser-guided bombs quickly pr ...
systems, weapons like the AGM-62 Walleye TV guided bomb are still being used, in conjunction with the AAW-144 Data Link Pod, on
US Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage ...
F/A-18 Hornet The McDonnell Douglas F/A-18 Hornet is an all-weather, twin-engine, supersonic, carrier-capable, multirole combat aircraft, designed as both a fighter and attack aircraft (hence the F/A designation). Designed by McDonnell Douglas (now par ...
s.


Infrared-guided/electro-optical weapons

In World War II, the U.S.
National Defense Research Committee The National Defense Research Committee (NDRC) was an organization created "to coordinate, supervise, and conduct scientific research on the problems underlying the development, production, and use of mechanisms and devices of warfare" in the Un ...
developed the VB-6 Felix, which used infrared to home on ships. While it entered production in 1945, it was never employed operationally. The first successful electro optical guided munition was the AGM-62 Walleye during the Vietnam war. It was a family of large glide bombs which could automatically track targets using contrast differences in the video feed. The original concept was created by engineer Norman Kay while tinkering with televisions as a hobby. It was based on a device which could track objects on a television screen and place a "blip" on them to indicate where it was aiming. The first test of the weapon on 29 January 1963 was a success, with the weapon making a direct hit on the target. It served successfully for three decades until the 1990s.
John Darrell Sherwood John Darrell Sherwood (born 1966) is an American author who has published five books and numerous articles. He specializes in military history, but has also published articles on travel and skiing. He has been with the Naval History and Herit ...
, ''Nixon's Trident: Naval Power in Southeast Asia, 1968–1972,'' (Washington: DC:
Naval Historical Center The Naval History and Heritage Command, formerly the Naval Historical Center, is an Echelon II command responsible for the preservation, analysis, and dissemination of U.S. naval history and heritage located at the historic Washington Navy Yard. ...
, forthcoming).
The
Raytheon Raytheon Technologies Corporation is an American multinational aerospace and defense conglomerate headquartered in Arlington, Virginia. It is one of the largest aerospace and defense manufacturers in the world by revenue and market capitaliz ...
Maverick is the most common electro optical guided missile. As a heavy anti-tank missile it has among its various marks guidance systems such as electro-optical (AGM-65A), imaging infrared (AGM-65D), and laser homing (AGM-65E). The first two, by guiding themselves based on the visual or IR scene of the target, are
fire-and-forget Fire-and-forget is a type of missile guidance which does not require further external intervention after launch such as illumination of the target or wire guidance, and can hit its target without the launcher being in line-of-sight of the targ ...
in that the pilot can release the weapon and it will guide itself to the target without further input, which allows the delivery aircraft to manoeuvre to escape return fire. The Pakistani
NESCOM The National Engineering & Scientific Commission (NESCOM) ( ur, ) is a Pakistani missile manufacturer and civilian research organization of Pakistan, under the administrative control of the Strategic Plans Division of Pakistan's National Command ...
H-2 MUPSOW and H-4 MUPSOW is an electro-optical (IR imaging and television guided) is a drop and forget precision-guided glide bomb. The Israeli Elbit Opher is also an IR imaging "drop and forget" guided bomb that has been reported to be considerably cheaper than laser-homing bombs and can be used by any aircraft, not requiring specialized wiring for a laser designator or for another aircraft to illuminate the target. During NATO's air campaign in 1999 in Kosovo the new Italian AF AMX employed the Opher.


Laser-guided weapons

In 1962, the US Army began research into
laser A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The word "laser" is an acronym for "light amplification by stimulated emission of radiation". The firs ...
guidance systems and by 1967 the USAF had conducted a competitive evaluation leading to full development of the world's first
laser-guided bomb A laser-guided bomb (LGB) is a guided bomb that uses semi-active laser guidance to strike a designated target with greater accuracy than an unguided bomb. First developed by the United States during the Vietnam War, laser-guided bombs quickly pr ...
, the BOLT-117, in 1968. All such bombs work in much the same way, relying on the target being illuminated, or "painted," by a laser target designator on the ground or on an aircraft. They have the significant disadvantage of not being usable in poor weather where the target illumination cannot be seen, or where a target designator cannot get near the target. The laser designator sends its beam in a coded series of pulses so the bomb cannot be confused by an ordinary laser, and also so multiple designators can operate in reasonable proximity. Originally the project began as a surface to air missile seeker developed by Texas Instruments. When TI executive Glenn E. Penisten attempted to sell the new technology to the Air Force they inquired if it could instead be used as a ground attack system to overcome problems they were having with accuracy of bombing in Vietnam. After 6 attempts the weapon improved accuracy from and greatly exceeded the design requirements. The system was sent to Vietnam and performed well. Without the existence of tracking pods they had to be aimed using a hand held laser from the back seat of an F-4 Phantom, but still performed well. Eventually over 28,000 were dropped during the war. Laser-guided weapons did not become commonplace until the advent of the microchip. They made their practical debut in Vietnam, where on 13 May 1972 they were used in the second successful attack on the Thanh Hóa Bridge ("Dragon's Jaw"). This structure had previously been the target of 800 American sorties (using unguided weapons) and was partially destroyed in each of two successful attacks, the other being on 27 April 1972 using
Walleyes The walleye (''Sander vitreus'', synonym ''Stizostedion vitreum''), also called the yellow pike or yellow pickerel, is a freshwater perciform fish native to most of Canada and to the Northern United States. It is a North American close relati ...
. They were used, though not on a large scale, by the British forces during the 1982
Falklands War The Falklands War ( es, link=no, Guerra de las Malvinas) was a ten-week undeclared war between Argentina and the United Kingdom in 1982 over two British dependent territories in the South Atlantic: the Falkland Islands and its territori ...
. The first large-scale use of smart weapons came in the early 1990s during Operation
Desert Storm The Gulf War was a 1990–1991 armed campaign waged by a Coalition of the Gulf War, 35-country military coalition in response to the Iraqi invasion of Kuwait. Spearheaded by the United States, the coalition's efforts against Ba'athist Iraq, ...
when they were used by coalition forces against
Iraq Iraq,; ku, عێراق, translit=Êraq officially the Republic of Iraq, '; ku, کۆماری عێراق, translit=Komarî Êraq is a country in Western Asia. It is bordered by Turkey to Iraq–Turkey border, the north, Iran to Iran–Iraq ...
. Even so, most of the air-dropped ordnance used in that war was "dumb," although the percentages are biased by the large use of various (unguided)
cluster bomb A cluster munition is a form of air-dropped or ground-launched explosive weapon that releases or ejects smaller submunitions. Commonly, this is a cluster bomb that ejects explosive bomblets that are designed to kill personnel and destroy vehic ...
s. Laser-guided weapons were used in large numbers during the 1999
Kosovo War The Kosovo War was an armed conflict in Kosovo that started 28 February 1998 and lasted until 11 June 1999. It was fought by the forces of the Federal Republic of Yugoslavia (i.e. Serbia and Montenegro), which controlled Kosovo before the w ...
, but their effectiveness was often reduced by the poor weather conditions prevalent in the southern Balkans. There are two basic families of laser-guided bombs in American (and American-sphere) service: the
Paveway Paveway is a series of laser-guided bombs (LGBs). ''Pave'' or PAVE is sometimes used as an acronym for ''precision avionics vectoring equipment''; literally, electronics for controlling the speed and direction of aircraft. Laser guidance i ...
II and the Paveway III. The Paveway III guidance system is more aerodynamically efficient and so has a longer range, however it is more expensive. Paveway II LGBs (such as
GBU-12 The GBU-12 Paveway II is an American aerial laser-guided bomb, based on the Mk 82 500-pound (227 kg) general-purpose bomb, but with the addition of a nose-mounted laser seeker and fins for guidance. A member of the Paveway series of weapons ...
) are a cheaper lightweight PGM suitable for use against vehicles and other small targets, while a Paveway III penetrator (such as
GBU-24 GBU-24 Paveway III or simply GBU-24 is a family of laser-guided bombs, a sub-group of the larger Raytheon Paveway III family of weapons. The Paveway guidance package consists of a seeker package attached to the nose of the weapon, and a wing ...
) is a more expensive weapon suitable for use against high-value targets. GBU-12s were used to great effect in the first
Gulf War The Gulf War was a 1990–1991 armed campaign waged by a Coalition of the Gulf War, 35-country military coalition in response to the Iraqi invasion of Kuwait. Spearheaded by the United States, the coalition's efforts against Ba'athist Iraq, ...
, dropped from
F-111F The General Dynamics F-111 Aardvark is a retired supersonic, medium-range, multirole combat aircraft. Production variants of the F-111 had roles that included ground attack (e.g. interdiction), strategic bombing (including nuclear weapons ca ...
aircraft to destroy Iraqi armored vehicles in a process informally referred to by pilots as "
tank plinking Tank plinking is the military practice of using precision-guided munitions to destroy artillery, armored personnel carriers, tanks, and other targets. The term was coined by pilots during the Gulf War, but discouraged by the military. As the war p ...
." AGM-123 Skipper II is a short-range laser-guided missile developed by the
United States Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage ...
. The Skipper was intended as an anti-ship weapon, capable of disabling the largest vessels with a impact-
fuze In military munitions, a fuze (sometimes fuse) is the part of the device that initiates function. In some applications, such as torpedoes, a fuze may be identified by function as the exploder. The relative complexity of even the earliest fuze de ...
d warhead. It is composed of a
Mark 83 bomb The Mark 83 is part of the Mark 80 series of low-drag general-purpose bombs in United States service. Development and deployment The nominal weight of the bomb is 1,000 lb (454 kg), although its actual weight varies between 985  ...
fitted with a
Paveway Paveway is a series of laser-guided bombs (LGBs). ''Pave'' or PAVE is sometimes used as an acronym for ''precision avionics vectoring equipment''; literally, electronics for controlling the speed and direction of aircraft. Laser guidance i ...
guidance kit and two Mk 78 solid propellant rockets that fire upon launch. Sudarshan is an Indian
laser-guided Laser guidance directs a robotics system to a target position by means of a laser beam. The laser guidance of a robot is accomplished by projecting a laser light, image processing and communication to improve the accuracy of guidance. The key ide ...
bomb A bomb is an explosive weapon that uses the exothermic reaction of an explosive material to provide an extremely sudden and violent release of energy. Detonations inflict damage principally through ground- and atmosphere-transmitted mechan ...
kit Kit may refer to: Places *Kitt, Indiana, US, formerly Kit * Kit, Iran, a village in Mazandaran Province * Kit Hill, Cornwall, England People * Kit (given name), a list of people and fictional characters * Kit (surname) Animals * Young animals: ...
, developed by
Aeronautical Development Establishment Aeronautical Development Establishment is a laboratory of India's Defence Research and Development Organisation. Located in Bangalore Bangalore (), officially Bengaluru (), is the capital and largest city of the Indian state of Karna ...
(ADE), a
DRDO The Defence Research and Development Organisation (DRDO) ( IAST: ''Raksā Anūsandhān Evam Vikās Sangaṭhan'') is the premier agency under the Department of Defence Research and Development in Ministry of Defence of the Government of India ...
lab with technological support from another DRDO lab Instruments Research and Development Establishment (IRDE), for the
Indian Air Force The Indian Air Force (IAF) is the air arm of the Indian Armed Forces. Its complement of personnel and aircraft assets ranks third amongst the air forces of the world. Its primary mission is to secure Indian airspace and to conduct aerial w ...
(IAF). KAB-1500L and KAB-500L are Russian laser-guided bombs. LT PGB is a family of Chinese
laser-guided Laser guidance directs a robotics system to a target position by means of a laser beam. The laser guidance of a robot is accomplished by projecting a laser light, image processing and communication to improve the accuracy of guidance. The key ide ...
munition Ammunition (informally ammo) is the material fired, scattered, dropped, or detonated from any weapon or weapon system. Ammunition is both expendable weapons (e.g., bombs, missiles, grenades, land mines) and the component parts of other weapo ...
s.
LS PGB LS is an abbreviation for a family of Chinese built precision-guided munitions (PGM) named Thunder Stone Precision Guided Bomb (, Léi-shí Jīngquè Zhì-dǎo Zhàdàn) developed by Luoyang Electro-Optics Technology Development Centre (EOTDC) ...
is a family of Chinese GPS+INS or laser guided munitions. The Advanced Precision Kill Weapon System (APKWS) also known as Laser, infrared Guided Rocket (LiGR) is a design conversion of
Hydra 70 The Hydra 70 rocket is a diameter fin-stabilized unguided rocket used primarily in the air-to-ground role. It can be equipped with a variety of warheads, and in more recent versions, guidance systems for point attacks. The Hydra is widely used by ...
unguided rockets with a
laser guidance Laser guidance directs a robotics system to a target position by means of a laser beam. The laser guidance of a robot is accomplished by projecting a laser light, image processing and communication to improve the accuracy of guidance. The key i ...
kit to turn them into precision-guided munitions (PGMs).
Ugroza Ugroza (russian: Угроза, meaning "menace") is a precision-guided weapons system developed by the Russian Federation. It is an upgrade for standard Russian "dumb" rockets, including the S-5, S-8, and S-13 rockets. The system upgrades the "dum ...
(russian: Угроза, meaning "menace") is a precision-guided weapons system made in
Russian Federation Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia North Asia or Northern Asia, also referred to as Siberia, is the northern region of Asia, which is defined in geographic ...
. It is an upgrade for standard Russian "dumb" rockets, including the S-5, S-8, and
S-13 rocket The S-13 is a 122 mm calibre unguided rocket weapon developed by the Soviet Air Force for use by military aircraft. It remains in service with the Russian Air Force and some other countries. Development The S-13 rocket was developed in th ...
s. The system upgrades the "dumb" rockets with
laser guidance Laser guidance directs a robotics system to a target position by means of a laser beam. The laser guidance of a robot is accomplished by projecting a laser light, image processing and communication to improve the accuracy of guidance. The key i ...
, very significantly increasing their accuracy. It requires a
laser target designator A laser designator is a laser light source which is used to designate a target. Laser designators provide targeting for laser-guided bombs, missiles, or precision artillery munitions, such as the Paveway series of bombs, AGM-114 Hellfir ...
, from either an airborne or land based source, to "paint" a target.
Circular error probable In the military science of ballistics, circular error probable (CEP) (also circular error probability or circle of equal probability) is a measure of a weapon system's precision. It is defined as the radius of a circle, centered on the mean, ...
(CEP) is about , while maximum ranges of rockets varies from the rockets used . Ugroza allows rockets to be ripple-fired up to 7 at a time. The notable novelty is that the system does not use aerodynamic flight control (e.g. tail fins), but impulse steering with mini-thrusters. It has been dubbed as the Russian concept of impulse corrections (RCIC). The Roketsan Cirit is a Turkish laser guided missile. Cirit is a guided missile system fitted with a
semi-active laser Laser guidance directs a robotics system to a target position by means of a laser beam. The laser guidance of a robot is accomplished by projecting a laser light, image processing and communication to improve the accuracy of guidance. The key ide ...
homing seeker. The seeker and guidance section is attached to a purpose-built
warhead A warhead is the forward section of a device that contains the explosive agent or toxic (biological, chemical, or nuclear) material that is delivered by a missile, rocket, torpedo, or bomb. Classification Types of warheads include: *Explos ...
with a Class 5 Insensitive Munition (IM). The multipurpose warhead has a combined
armour-piercing Armour-piercing ammunition (AP) is a type of projectile designed to penetrate either body armour or vehicle armour. From the 1860s to 1950s, a major application of armour-piercing projectiles was to defeat the thick armour carried on many warsh ...
ammunition with enhanced behind armor
anti-personnel An anti-personnel weapon is a weapon primarily used to maim or kill infantry and other personnel not behind armor, as opposed to attacking structures or vehicles, or hunting game. The development of defensive fortification and combat vehicle ...
and incendiary effects. The engine is of reduced smoke design, with IM properties. It is connected to the rear section by a roll bearing that enables it to rotate in flight. There are four small stabilising surfaces at the very rear of the missile in front of the exhaust nozzle that ensures stable flight. Roketsan has developed a new launch pod and a new canister in which Cirit is delivered as an all-up round. The Cirit has a maximum effective guided range of with a high probability of hit on a target at this range.


Radar-guided weapons

The Lockheed-Martin Hellfire II light-weight anti-tank weapon in one mark uses the radar on the
Boeing The Boeing Company () is an American multinational corporation that designs, manufactures, and sells airplanes, rotorcraft, rockets, satellites, telecommunications equipment, and missiles worldwide. The company also provides leasing and ...
AH-64D Apache Longbow to provide fire-and-forget guidance for that weapon.


Satellite-guided weapons

Lessons learned during the first Gulf War showed the value of precision munitions, yet they also highlighted the difficulties in employing them—specifically when visibility of the ground or target from the air was degraded. The problem of poor visibility does not affect satellite-guided weapons such as
Joint Direct Attack Munition The Joint Direct Attack Munition (JDAM) is a guidance kit that converts unguided bombs, or "dumb bombs", into all-weather precision-guided munitions. JDAM-equipped bombs are guided by an integrated inertial guidance system coupled to a Global ...
(JDAM) and Joint Stand-Off Weapon (JSOW), which make use of the United States' GPS system for guidance. This weapon can be employed in all weather conditions, without any need for ground support. Because it is possible to jam GPS, the guidance package reverts to inertial navigation in the event of GPS signal loss. Inertial navigation is significantly less accurate; the JDAM achieves a published circular error probable, Circular Error Probable (CEP) of under GPS guidance, but typically only under inertial guidance (with free fall times of 100 seconds or less). The
Joint Direct Attack Munition The Joint Direct Attack Munition (JDAM) is a guidance kit that converts unguided bombs, or "dumb bombs", into all-weather precision-guided munitions. JDAM-equipped bombs are guided by an integrated inertial guidance system coupled to a Global ...
(JDAM) is a guidance kit that converts
unguided bomb An unguided bomb, also known as a free-fall bomb, gravity bomb, dumb bomb, or iron bomb, is a conventional or nuclear aircraft-delivered bomb that does not contain a guidance system and hence simply follows a ballistic trajectory. This descri ...
s, or "dumb bombs", into all-weather "smart" munitions. JDAM-equipped bombs are guided by an integrated inertial guidance system coupled to a Global Positioning System (GPS) receiver, giving them a published range of up to . JDAM-equipped bombs range from . When installed on a bomb, the JDAM kit is given a GBU (Guided Bomb Unit) nomenclature, superseding the Mark 80 or BLU (Bomb, Live Unit) nomenclature of the bomb to which it is attached. Wind Corrected Munitions Dispenser (WCMD) is a GPS/INS-guided US tail kit for use with the TMD (Tactical Munitions Dispenser) family of cluster bombs to convert them to precision-guided munitions. Wan Chien, Wan chien – Taiwanese indigenous version of JDAM. The Griffin Laser Guided Bomb (Griffin LGB) is a
laser-guided bomb A laser-guided bomb (LGB) is a guided bomb that uses semi-active laser guidance to strike a designated target with greater accuracy than an unguided bomb. First developed by the United States during the Vietnam War, laser-guided bombs quickly pr ...
system made by Israel Aerospace Industries' MBT missile division. It is an add-on kit which is used to retrofit existing Mark 82 bomb, Mark 82, Mark 83 bomb, Mark 83, and Mark 84 bomb, Mark 84 and other "dumb fire" unguided bomb, gravity bombs, making them into
laser-guided Laser guidance directs a robotics system to a target position by means of a laser beam. The laser guidance of a robot is accomplished by projecting a laser light, image processing and communication to improve the accuracy of guidance. The key ide ...
smart bombs (with the option of GPS guidance). Initial development completed in 1990. The Griffin conversion kit consists of a front "seeker" section and a set of steerable tailplanes. The resulting guided munition features "trajectory shaping", which allows the bomb to fall along a variety of trajectories – from a shallow angle to a vertical top attack profile. IAI publishes a circular error probable figure for the weapon of 5 metres. The GBU-57A/B Massive Aircraft ordnance, Ordnance Penetrator (MOP) is a United States Air Force, U.S. Air Force, precision-guided, "bunker buster"
bomb A bomb is an explosive weapon that uses the exothermic reaction of an explosive material to provide an extremely sudden and violent release of energy. Detonations inflict damage principally through ground- and atmosphere-transmitted mechan ...
. This is substantially larger than the deepest penetrating bunker busters previously available, the GBU-28 and GBU-37 GPS-Aided Munition, GBU-37. The SMKB (Smart-MK-Bomb) is a Brazilian guidance kit that turns a standard Mk 82 or Mk 83 into a precision-guided weapon, respectively called SMKB-82 and SMKB-83. The kit provides extended range up to and are guided by an integrated inertial guidance system coupled to three satellites networks (GPS, Galileo (satellite navigation), Galileo and GLONASS), relying on wireless to handle the flow of data between the aircraft and the munition. FT PGB is a family of Chinese satellite and Inertial navigation system, Inertial, guided munitions.
LS PGB LS is an abbreviation for a family of Chinese built precision-guided munitions (PGM) named Thunder Stone Precision Guided Bomb (, Léi-shí Jīngquè Zhì-dǎo Zhàdàn) developed by Luoyang Electro-Optics Technology Development Centre (EOTDC) ...
is a family of Chinese GPS+INS or laser guided munitions. The precision of these weapons is dependent both on the precision of the measurement system used for location determination and the precision in setting the coordinates of the target. The latter critically depends on intelligence information, not all of which is accurate. According to a CIA report, the accidental United States bombing of the Chinese embassy in Belgrade during Operation Allied Force by NATO aircraft was attributed to faulty target information. However, if the targeting information ''is'' accurate, satellite-guided weapons are significantly more likely to achieve a successful strike in any given weather conditions than any other type of precision-guided munition.


Advanced guidance concepts

Responding to after-action reports from pilots who employed laser or satellite guided weapons,
Boeing The Boeing Company () is an American multinational corporation that designs, manufactures, and sells airplanes, rotorcraft, rockets, satellites, telecommunications equipment, and missiles worldwide. The company also provides leasing and ...
developed a Laser JDAM (LJDAM) to provide both types of guidance in a single kit. Based on the existing
Joint Direct Attack Munition The Joint Direct Attack Munition (JDAM) is a guidance kit that converts unguided bombs, or "dumb bombs", into all-weather precision-guided munitions. JDAM-equipped bombs are guided by an integrated inertial guidance system coupled to a Global ...
configurations, a laser guidance package is added to a GPS/INS-guided weapon to increase its overall accuracy. Raytheon has developed the Enhanced Paveway family, which adds GPS/INS guidance to their Paveway family of laser-guidance packages. These "hybrid" laser and GPS guided weapons permit the carriage of fewer weapons types, while retaining mission flexibility, because these weapons can be employed equally against moving and fixed targets, or targets of opportunity. For instance, a typical weapons load on an F-16 flying in the Iraq War included a single JDAM and two LGBs. With LJDAM, and the new GBU-39 Small Diameter Bomb (SDB), these same aircraft can carry more bombs if necessary, and have the option of satellite or laser guidance for each weapon release. Spice (munition) is an Israeli Electro-optics, EO/GPS-guided guidance kit for converting air-droppable unguided
bomb A bomb is an explosive weapon that uses the exothermic reaction of an explosive material to provide an extremely sudden and violent release of energy. Detonations inflict damage principally through ground- and atmosphere-transmitted mechan ...
s into precision guided bombs. Spice can be preprogrammed, with up to 100 different targets it may have to engage during a mission. The one target it will ''actually'' engage may then be selected, inflight, by an aircrewman. HGK (bomb), The HGK guidance kit (HGK), tr, Hassas Güdüm Kiti / Precision Guidance Kit), developed by TÜBİTAK Defense Industries Research and Development Institute, TÜBİTAK-SAGE, is a GPS/Inertial navigation system, INS guidance kit that converts Mark 84 bombs into Smart bomb, smart weapons. It enables precision strike capability in all weather conditions with long range at a dispersion of . Armement Air-Sol Modulaire (AASM) is a French equivalent to JDAM. AASM comprises a frontal guidance kit and a rear-mounted range extension kit matched to a dumb bomb. The weapon is modular because it can integrate different types of guidance units and different types of bombs. It uses hybrid inertial navigation system (INS) / Global Positioning System (GPS) guidance. Other variants add infrared homing or
laser guidance Laser guidance directs a robotics system to a target position by means of a laser beam. The laser guidance of a robot is accomplished by projecting a laser light, image processing and communication to improve the accuracy of guidance. The key i ...
to increase accuracy. Paveway IV is a dual mode GPS/inertial navigation system, INS and Laser guidance, laser-guided bomb manufactured by Raytheon, Raytheon UK (formerly Raytheon Systems Limited). It is the latest iteration of the
Paveway Paveway is a series of laser-guided bombs (LGBs). ''Pave'' or PAVE is sometimes used as an acronym for ''precision avionics vectoring equipment''; literally, electronics for controlling the speed and direction of aircraft. Laser guidance i ...
series. Denel Dynamics Umbani a Precision guided munition, precision-guided bomb kit manufactured by Denel Dynamics in South Africa. It consists of a number of modules fitted to NATO standard Mark 81 bomb, Mk81, Mk82 or Mark 83 bomb, Mk83 low drag free-fall bombs to convert them to
glide bomb A glide bomb or stand-off bomb is a standoff weapon with flight control surfaces to give it a flatter, gliding flight path than that of a conventional bomb without such surfaces. This allows it to be released at a distance from the target r ...
s. Smart Anti-Airfield Weapon (SAAW) is an Indian precision-guided Anti-runway penetration bomb, Anti-Airfield Weapon developed by Research Centre Imarat of DRDO with a range up to . High Speed Low Drag Bomb (HSLD) is an Indian precision guided munition developed by Armament Research and Development Establishment that is comparable with the US' Mark 80 series. It uses Inertial navigation system, inertial and satellite navigation with
laser guidance Laser guidance directs a robotics system to a target position by means of a laser beam. The laser guidance of a robot is accomplished by projecting a laser light, image processing and communication to improve the accuracy of guidance. The key i ...
kit for target accuracy. Moving Target Artillery Round (MTAR) The U.S. Navy leads development for a new artillery round called Moving Target Artillery Round, capable of destroying moving targets in GPS-denied environments". The Office of Naval Research (ONR), the Naval Surface Warfare Center Dahlgren Division (NSWC Dahlgren), and the U.S. Army Research Laboratory (ARL) have been coordinating MTAR, with final development scheduled for 2019. Key features of the MTAR shell include extended range against moving targets, precision guidance and navigation without GPS, subsystem modularity, subsystem maturity, weapon system compatibility, restricted altitude, all-weather capability, reduced time of flight, and affordability. The new munition is intended for the Army or Marine Corps M777A1 howitzer, the M109A6 Paladin, and M109A7 Paladin Integrated Management (PIM) self-propelled artillery systems. The shell also would be for the Navy's Advanced Gun System (AGS) aboard the Zumwalt-class destroyer, and other future naval gun systems. Precision Guidance Kit – Modernization (PGK-M) The U.S. Army is planning for GPS-denied environments with the new Precision Guidance Kit – Modernization (PGK-M). An enhancement of previous technologies, PGK-M will give U.S. forces the ability to continue launching precision strikes when GPS is compromised by the enemy. Picatinny Arsenal engineers are leading the development of a GPS alternative using image navigation for precision guidance of munitions, under the Armament Research, Development and Engineering Center (ARDEC). Other research partners include Draper Labs, U.S. Army Research Laboratory, Air Force Research Laboratory and the Aviation and Missile Research, Development, and Engineering Center. The enhanced munition can navigate to a desired location, through a reference image used by the technology to reach the target. The PGK-M includes a collection of ad hoc software programmable radio networks, various kinds of wave-relay connectivity technologies and navigational technology. PBK-500U Drel is a Russian guided jamming-resistant stealth glide bomb.


Cannon and mortar-launched guided projectiles

A cannon-launched guided projectile (CLGP), is fired from artillery, naval artillery, ship's cannon, or armored vehicles. Several agencies and organizations sponsored the CLGP programs. The
United States Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage ...
sponsored the Deadeye program, a laser-guided shell for its 5"/54 caliber Mark 45 gun, guns and a program to mate a
Paveway Paveway is a series of laser-guided bombs (LGBs). ''Pave'' or PAVE is sometimes used as an acronym for ''precision avionics vectoring equipment''; literally, electronics for controlling the speed and direction of aircraft. Laser guidance i ...
guidance system to an shell for the 8"/55 caliber Mark 71 gun in the 1970s
Photo
. Other Navy efforts include the BTERM, ERGM, and LRLAP shells. The U.S. Army's MGM-51 Shillelagh missile can be considered a type of CLGP. Intended for use on the M551 Sheridan light tank, the Shillelagh missile was fired out of the Sheridan's cannon to provide robust anti-tank capability. The Army's M712 Copperhead laser guided artillery round was used in Desert Storm. Army CLGPs include the M982 Excalibur artillery shell, the XM395 Precision Guided Mortar Munition, and the XM1156 Precision Guidance Kit to refit existing 155 mm shells with precision guidance, as the United States Air Force, Air Force's JDAM program converts dumb bombs into precision munitions. M982 Excalibur, GPS-guided munitions (XM982) for 155 mm artillery was developed in a collaborative effort between U.S. Army Research Laboratory (ARL) and the Armaments Research and Development Center (ARDEC). Research included developing GPS and microelectromechanical systems (MEMS) Inertial Sensor Technology. Excalibur was fielded in Operation Iraqi Freedom in the summer of 2007. Technology developed on the Excalibur is also applied in the Army's Precision Guidance Kit (PGK) for use on existing conventional projectiles and the Mortar Guidance Kit (MGK) for use on conventional mortars. XM1111 Mid-Range Munition is cancelled tank gun launched missile. LAHAT is Israeli semi-active laser homing guided low-weight anti-tank guided missile that can be launched from smoothbore tank guns. KSTAM is South Korean guided munition shot from the gun of K2 Black Panther tank. Krasnopol (Weapon), 30F39 Krasnopol is a Russian cannon-launched, fin-stabilized, base bleed-assisted, semi-automatic
laser-guided Laser guidance directs a robotics system to a target position by means of a laser beam. The laser guidance of a robot is accomplished by projecting a laser light, image processing and communication to improve the accuracy of guidance. The key ide ...
, explosive projectile. It automatically 'homes' on a point illuminated by a laser designator, typically operated by a ground-based artillery observer. Kitolov-2M is a Russian laser-guided artillery shell with Malakhit automated artillery fire control system. 9M119 Svir/Refleks are Russian tank gun-launched laser-guided projectiles. Strix mortar round, Pansarsprängvinggranat m/94 ''STRIX'' is a Swedish endphase-guided projectile fired from a mortar (weapon), mortar currently manufactured by Saab Bofors Dynamics. STRIX is fired like a conventional mortar round. The round contains an
infrared Infrared (IR), sometimes called infrared light, is electromagnetic radiation (EMR) with wavelengths longer than those of visible light. It is therefore invisible to the human eye. IR is generally understood to encompass wavelengths from aroun ...
imaging sensor that it uses to guide itself onto any tank or armoured fighting vehicle in the vicinity where it lands. The seeker is designed to ignore targets that are already burning. Basir is an Iranian artillery fired
laser-guided Laser guidance directs a robotics system to a target position by means of a laser beam. The laser guidance of a robot is accomplished by projecting a laser light, image processing and communication to improve the accuracy of guidance. The key ide ...
, 155 mm explosive projectile designed to destroy enemy tanks, vehicles and other moving or non-moving targets with high precision. This weapon is similar in function with Russian Krasnopol (Weapon), Kransnopol or American M712 Copperhead. SMArt 155 is a German 155 mm artillery round, designed for a long range, indirect fire top attack role against armoured vehicles. The SMArt carrier shell contains two submunitions with infrared sensor and millimeter wave radar, which descend over the battlefield on ballutes and attack hardened targets with explosively formed penetrator warheads. Built with multiple redundant self-destruct mechanisms, these submunitions were specifically designed to fall outside the category of submunition weapons prohibited by the 2008 Convention on Cluster Munitions. SAMHO (missile), SAMHO is an Indian gun-launched anti-tank guided missile developed by the Armament Research and Development Establishment (ARDE) for the Arjun MBT of the Indian Army. Rheinmetall Denel Munitions 155 mm V-LAP GP1: Chinese laser-guided 155 mm artillery projectile based on Krasnopol. GP6: Chinese laser-guided 155 mm artillery projectile based on Krasnopol. XM395 Precision Guided Mortar Munition Strix mortar round KM-8 Gran is a Russian guided 120 mm mortar shell with Malakhit fire control system. GP120 (GP4) is a Chinese terminal corrected 120 mm mortar shell. GP140 is a Chinese
semi-active laser Laser guidance directs a robotics system to a target position by means of a laser beam. The laser guidance of a robot is accomplished by projecting a laser light, image processing and communication to improve the accuracy of guidance. The key ide ...
(SAL) guided 120 mm mortar shell.


Guided small arms

Precision-guided small arms prototypes have been developed which use a laser designator to guide an smart bullet, electronically actuated bullet to a target. Another system in development uses a laser range finder to trigger an explosive small arms shell in proximity to a target. The U.S. Army plans to use such devices in the future. In 2008 the EXACTO program began under DARPA to develop a "fire and forget" smart sniper rifle system including a guided smart bullet and improved scope. The exact technologies of this smart bullet have not been released. EXACTO was test fired in 2014 and 2015 and results showing the bullet alter course to correct its path to its target were released. In 2012 Sandia National Laboratories announced a self-guided bullet prototype that could track a target illuminated with a laser designator. The bullet is capable of updating its position 30 times a second and hitting targets over a mile away. In mid-2016, Russia revealed it was developing a similar "smart bullet" weapon designed to hit targets at a distance of up to . Pike (munition), Pike is a precision-guided mini-missile fired from an underslung grenade launcher. Air burst grenade launchers are a type of precision-guided weapons. Such grenade launchers can preprogram their grenades using a fire-control system to explode in the air above or beside the enemy.https://www.orbitalatk.com/defense-systems/armament-systems/cdte/


See also

* Guidance system * Guided bomb * Missile guidance * TERCOM * Terminal guidance * Wire-guided missile


Notes

;References


External links

*
A Brief History of Precision Guided WeaponsBBC: "Smart bombs missed Iraqi targets"
— ''on the first employment of the JSOW, guidance failures from a software error subsequently fixed''.
"Fact File: Smart Bombs – not so Smart"
BBC story discussing the limitations of guided munition employment.
Janes.com: "Ukraine develops indigenous guided airborne weapons"
— ''2006 article about Ukrainian guided bomb development.''

by Air Power Australia {{DEFAULTSORT:Precision-Guided Munition Weapon guidance, * Aerial bombs Targeting (warfare)