Ground Launched Cruise Missile
Encyclopedia
The Ground Launched Cruise Missile, or GLCM, (officially designated BGM-109G Gryphon) was a ground-launched cruise missile
Cruise missile
A cruise missile is a guided missile that carries an explosive payload and is propelled, usually by a jet engine, towards a land-based or sea-based target. Cruise missiles are designed to deliver a large warhead over long distances with high accuracy...

 developed by the United States Air Force
United States Air Force
The United States Air Force is the aerial warfare service branch of the United States Armed Forces and one of the American uniformed services. Initially part of the United States Army, the USAF was formed as a separate branch of the military on September 18, 1947 under the National Security Act of...

 in the last decade of the Cold War
Cold War
The Cold War was the continuing state from roughly 1946 to 1991 of political conflict, military tension, proxy wars, and economic competition between the Communist World—primarily the Soviet Union and its satellite states and allies—and the powers of the Western world, primarily the United States...

.

Overview

The BGM-109G was developed as a counter to the mobile medium- and intermediate- range ballistic nuclear missiles deployed by the Soviet Union
Soviet Union
The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....

 in Eastern Bloc European countries
Warsaw Pact
The Warsaw Treaty Organization of Friendship, Cooperation, and Mutual Assistance , or more commonly referred to as the Warsaw Pact, was a mutual defense treaty subscribed to by eight communist states in Eastern Europe...

. The GLCM and the U.S. Army's Pershing II were the incentives that fostered Soviet willingness to sign the Intermediate-Range Nuclear Forces Treaty
Intermediate-Range Nuclear Forces Treaty
The Intermediate-Range Nuclear Forces Treaty is a 1987 agreement between the United States and the Soviet Union. Signed in Washington, D.C. by U.S. President Ronald Reagan and General Secretary Mikhail Gorbachev on December 8, 1987, it was ratified by the United States Senate on May 27, 1988 and...

 (INF treaty), and thus eventually reduced both the number and the threat of nuclear warheads in Europe. GLCM is also a generic term for any ground-launched cruise missile. Since the US deployed only one modern cruise missile in the tactical role, the GLCM name stuck. The GLCM was built by General Dynamics
General Dynamics
General Dynamics Corporation is a U.S. defense conglomerate formed by mergers and divestitures, and as of 2008 it is the fifth largest defense contractor in the world. Its headquarters are in West Falls Church , unincorporated Fairfax County, Virginia, in the Falls Church area.The company has...

.

Design & employment

A conventionally-configured cruise missile, the BGM-109 was essentially a small, pilotless flying machine, powered by a turbofan
Turbofan
The turbofan is a type of airbreathing jet engine that is widely used for aircraft propulsion. A turbofan combines two types of engines, the turbo portion which is a conventional gas turbine engine, and the fan, a propeller-like ducted fan...

 engine. Unlike ballistic missile
Ballistic missile
A ballistic missile is a missile that follows a sub-orbital ballistic flightpath with the objective of delivering one or more warheads to a predetermined target. The missile is only guided during the relatively brief initial powered phase of flight and its course is subsequently governed by the...

s, whose aimpoint is usually determined by gravitic trajectories, a cruise missile is capable of complicated aerial manoeuvres, and can fly a range of predetermined flight plans. Also, it flies at much lower altitudes than a ballistic missile, typically with a terrain-hugging flight plan. The trade-off for this low-observability flight is strike time; cruise missiles travel far more slowly than a ballistic weapon, and the GLCM was typical in this regard.

GLCM was developed as a ground-launched variant of the Tomahawk
BGM-109 Tomahawk
The Tomahawk is a long-range, all-weather, subsonic cruise missile. Introduced by General Dynamics in the 1970s, it was designed as a medium- to long-range, low-altitude missile that could be launched from a surface platform. It has been improved several times and, by way of corporate divestitures...

 missile in use by the U.S. Navy (along with an undeveloped air-launched version, the Medium Range Air to Surface Missile [MRASM].) Unlike other variants of the Tomahawk, the GLCM carried only a nuclear warhead; no conventional capability was provided. The W84
W84
The W84 is an American thermonuclear warhead designed for use on the BGM-109G Gryphon Ground Launched Cruise Missile . It is a derivative of the B61 nuclear bomb design and a close relative of the W80 warhead used on the AGM-86 ALCM, AGM-129 ACM, and BGM-109 Tomahawk SLCM cruise missiles.The W84...

 warhead was a variable-yield
Variable yield
Variable yield — or dial-a-yield — is an option available on most modern nuclear weapons. It allows the operator to specify a weapon's yield, or explosive power, allowing a single design to be used in different situations...

 kiloton-range weapon. Some estimates put the yield at between 10 and 50 kt. This tactical warhead contrasts with the W80 warhead found on other versions of the Tomahawk, and on the ALCM, which had a yield of 200 kt.2 The Pentagon
The Pentagon
The Pentagon is the headquarters of the United States Department of Defense, located in Arlington County, Virginia. As a symbol of the U.S. military, "the Pentagon" is often used metonymically to refer to the Department of Defense rather than the building itself.Designed by the American architect...

 credited the GLCM with a range of 2000–2500 kilometers. Like other US cruise missiles of this period, accuracy after more than 2000 km of flight was within half the width of a football field or 100 ft (approximately 30 meters). The missile was entirely subsonic
Speed of sound
The speed of sound is the distance travelled during a unit of time by a sound wave propagating through an elastic medium. In dry air at , the speed of sound is . This is , or about one kilometer in three seconds or approximately one mile in five seconds....

, powered by a turbofan
Turbofan
The turbofan is a type of airbreathing jet engine that is widely used for aircraft propulsion. A turbofan combines two types of engines, the turbo portion which is a conventional gas turbine engine, and the fan, a propeller-like ducted fan...

 engine with a rocket
Rocket
A rocket is a missile, spacecraft, aircraft or other vehicle which obtains thrust from a rocket engine. In all rockets, the exhaust is formed entirely from propellants carried within the rocket before use. Rocket engines work by action and reaction...

 booster assisting at launch.3

Militarily, the GLCM was targeted against fixed targets—at the outer edge of its range, the missile's flight time with its subsonic turbofan
Turbofan
The turbofan is a type of airbreathing jet engine that is widely used for aircraft propulsion. A turbofan combines two types of engines, the turbo portion which is a conventional gas turbine engine, and the fan, a propeller-like ducted fan...

 was more than 2½ hours. The missiles were launched from an elevated launcher, with the missile ejected from its cannister for about 13 seconds of solid rocket booster flight. The fins extended at 4 seconds, the air inlet and wings deployed at 10 seconds and the jet engine started at the end of the boost phase. Flying at low level, the missile was guided by TERCOM
TERCOM
Terrain Contour Matching, or TERCOM, is a navigation system used primarily by cruise missiles. It uses a pre-recorded contour map of the terrain that is compared to measurements made during flight by an on-board radar altimeter. A TERCOM system considerably increases the accuracy of a missile...

 (terrain contour matching) to the target. 3

This contrasted sharply with Pershing II, which had a flight time of 10–15 minutes. However, the range of the GLCM gave it the ability to strike deep within then-Soviet territory, and the weapon's guidance, and low RCS
RCS
RCS may refer to:Clubs and societies*Racing Club de Strasbourg*Radcliffe Choral Society*Royal College of Science*Royal College of Surgeons*Royal Commonwealth SocietyTechnology*Radar cross-section*Radio Computing Services*Reaction control system...

 would have made it far more difficult to intercept a GLCM even if the launch were detected in time.

BGM-109G personnel were trained at Davis Monthan AFB, Arizona, by the 868th Tactical Missile Training
Squadron from 1 July 1981 to 1 October 1985, when it became the 868th Tactical Missile Training Group. The group was deactivated on 31 May 1990. An area near Fort Huachuca was used for field training for GLCM flights. GLCM testing was conducted at Dugway Proving Ground in Utah, with many of the people involved in the testing going to operational wings as they were activated.

NATO Deployment & protests

BGM-109G missiles would be based at six locations throughout Europe; in the United Kingdom
United Kingdom
The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

 (at RAF Greenham Common
RAF Greenham Common
RAF Station Greenham Common is a former military airfield in Berkshire, England. The airfield is located approximately south-southwest of Thatcham; about west of London....

 and RAF Molesworth
RAF Molesworth
RAF Molesworth is a Royal Air Force station located near Molesworth, Cambridgeshire, United Kingdom with a history dating back to 1917.Its runway and flight line facilities were closed in 1973 and demolished to support ground-launched cruise missile operations in the early 1980s...

), Belgium
Belgium
Belgium , officially the Kingdom of Belgium, is a federal state in Western Europe. It is a founding member of the European Union and hosts the EU's headquarters, and those of several other major international organisations such as NATO.Belgium is also a member of, or affiliated to, many...

, Netherlands
Netherlands
The Netherlands is a constituent country of the Kingdom of the Netherlands, located mainly in North-West Europe and with several islands in the Caribbean. Mainland Netherlands borders the North Sea to the north and west, Belgium to the south, and Germany to the east, and shares maritime borders...

, Germany
Germany
Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

, and Comiso
Comiso
Comiso is an Italian municipality in the Province of Ragusa in Sicily.-Geography:Comiso consists of three boroughs: Comiso, Pedalino, and Quaglio. It lies some 22 km west of Ragusa in the South of Sicily...

 Air Station in Italy
Italy
Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

. Each location had its own unique problems, but all required extensive construction by the USAF. Initial operating capability (or IOC) occurred in 1983.4

Normal basing was in shelters at military installations. Each BGM-109G station was controlled by a Wing, that consisted of a Tactical Missile Squadron (TMS) which was responsible for operation and deployment of the missiles, and a Tactical Missile Maintenance Squadron (TMMS) which was responsible for the support of the system. Each TMS consisted of several flights, made up of 69 people and 22 vehicles.4

The missile was designed to operate in a flight with sixteen missiles. The flight would be normally on base, with the missiles and vehicles secured in the hardened storage area called the GAMA (GLCM Alert and Maintenance Area).

Four transporter erector launcher
Transporter erector launcher
A transporter erector launcher is a vehicle with an integrated prime mover that can carry, elevate to firing position and launch one or more missiles. Such vehicles exist for both surface-to-air missiles and surface-to-surface missiles...

s (TEL) each carried four BGM-109G missiles in their containers
and ready for launch. Two launch control centers (LCC), each with two launch officers, were connected to the TELs and interconnected for launch. Each TEL and LCC was towed by a large MAN AG 8 X 8 tractor and was capable of traversing rough terrain. There were 16 support vehicles for the flight commander, normally a captain, 19 maintenance technicians, a medical technician and 44 security personnel.4

During periods of increased tension, the flights would be deployed to pre-surveyed, classified locations in the countryside away from the base. The members of the flight would dig in, erect camouflage netting to hide the vehicles and prepare for launch. Flight commanders were tasked to survey and select more than one possible deployment site, with all details closely held, and the commander selected the location preferred when the flight deployed from the base. When deployed, the flight was self sustaining, and secured with special intrusion detection radar. The launchers (sans warheads) were sent out on a number of simulated scrambles.4

Although deployed in the face of a range of Soviet
Soviet Union
The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....

 IRBMs, including the brand-new and extremely capable SS-20 Saber, the GLCM (sometimes referred to by its phonetic nickname, Glick-em) faced widespread public protest in Europe. Many anti-nuclear
Campaign for Nuclear Disarmament
The Campaign for Nuclear Disarmament is an anti-nuclear organisation that advocates unilateral nuclear disarmament by the United Kingdom, international nuclear disarmament and tighter international arms regulation through agreements such as the Nuclear Non-Proliferation Treaty...

 Europeans felt that the United States was deploying weapons meant to win a tactical nuclear war, without adequate consideration of the effects that even a 'victory' would bring. Critics also argued that the Reagan Administration
Reagan Administration
The United States presidency of Ronald Reagan, also known as the Reagan administration, was a Republican administration headed by Ronald Reagan from January 20, 1981, to January 20, 1989....

 was unduly escalating tensions in Central Europe. Between them, GLCM and Pershing II made a lethal combination. GLCM missiles could be launched, undetected, followed 2 hours later by a Pershing strike, which would fly so quickly that it was possible no response could be made before the Pershings struck. Aside from presenting an attractive course of action to NATO commanders in the event of Soviet aggression, it put the Kremlin
Kremlin
A kremlin , same root as in kremen is a major fortified central complex found in historic Russian cities. This word is often used to refer to the best-known one, the Moscow Kremlin, or metonymically to the government that is based there...

 leaders (in range of the GLCM and possibly the Pershing, even in Moscow
Moscow
Moscow is the capital, the most populous city, and the most populous federal subject of Russia. The city is a major political, economic, cultural, scientific, religious, financial, educational, and transportation centre of Russia and the continent...

) in a position of fearing a decapitating NATO first strike, which could have moved them toward a launch on warning
Launch on warning
Launch on warning is a strategy of nuclear weapon retaliation that gained recognition during the Cold War between the United States and the Soviet Union. With the invention of intercontinental ballistic missiles , launch on warning became an integral part of mutually assured destruction theory...

 policy as the only way to maintain deterrence.5
However, the USSR did have submarine-launched missiles (i.e. Golf
Golf class submarine
Project 629, also known by the NATO reporting name of Golf class, were diesel electric ballistic missile submarines of the Soviet Navy. They were designed after six Zulu class submarines were successfully modified to carry and launch Scud missiles...

 and Hotel
Hotel class submarine
The Hotel class is the general NATO classification for a type of nuclear-powered ballistic missile submarine that was originally put into service by the Soviet Union around 1959. The Soviet designation is Project 658.-Design:...

 class SSBNs armed with R-27 Zyb and SS-N-5s) available during this time, so any fears of a decapitating first strike were not necessarily justified.

Intermediate-Range Nuclear Forces Treaty

Ironically, and despite the protesters' fears to the contrary, the deployment of GLCM actually brought greater stability to Central Europe, and lessened the incentive/need for a tactical nuclear exchange, through the mechanism of the INF treaty
Intermediate-Range Nuclear Forces Treaty
The Intermediate-Range Nuclear Forces Treaty is a 1987 agreement between the United States and the Soviet Union. Signed in Washington, D.C. by U.S. President Ronald Reagan and General Secretary Mikhail Gorbachev on December 8, 1987, it was ratified by the United States Senate on May 27, 1988 and...

. The recognition by Soviet leaders of the threat posed by the GLCM and Pershing II missiles made them far more inclined to agree to negotiate their own intermediate-range weapons, especially the SS-20, out of service, in exchange for the elimination of the threat posed by the GLCM and the Pershing II.6

Unlike SALT II or START I
START I
START was a bilateral treaty between the United States of America and the Union of Soviet Socialist Republics on the Reduction and Limitation of Strategic Offensive Arms. The treaty was signed on 31 July 1991 and entered into force on 5 December 1994...

, which set limits to maximum nuclear arsenals, the INF Treaty
Intermediate-Range Nuclear Forces Treaty
The Intermediate-Range Nuclear Forces Treaty is a 1987 agreement between the United States and the Soviet Union. Signed in Washington, D.C. by U.S. President Ronald Reagan and General Secretary Mikhail Gorbachev on December 8, 1987, it was ratified by the United States Senate on May 27, 1988 and...

 banned whole categories of intermediate-range tactical nuclear weapons outright. All ground-launched cruise missiles and ballistic missiles with ranges greater than 500 but less than 5500 kilometers were barred to the U.S. and USSR under this treaty. This meant the withdrawal of GLCM and Pershing II on the American side; the Soviets withdrew the SS-4 Sandal, SS-5 Skean, SS-12 Scaleboard, SS-20 Saber, SS-22 Scaleboard B, and SS-23 Spider MRBM/IRBM/LRBM ballistic missiles, in addition to the GLCM's most direct counterpart: the SSC-4 (dubbed the Tomahawksi in the Western press) and its supersonic follow-on, the SSC-X-5 cruise missiles.7

GLCM was removed from Europe beginning in 1988, and over the next three and a half years all units were transported to Davis Monthan AFB and destroyed or converted into displays by 1991. Eight missiles survive for inert static display only. No follow-on design has been authorized.8

USAF BGM-109G GLCM Units

  • 38th Tactical Missile Wing - Wueschheim AB, West Germany
    West Germany
    West Germany is the common English, but not official, name for the Federal Republic of Germany or FRG in the period between its creation in May 1949 to German reunification on 3 October 1990....

     (1985-1990)
89th
89th Tactical Missile Squadron
The 89th Tactical Missile Squadron is an inactive United States Air Force unit. Its last assignment was with the 38th Tactical Missile Wing, based at Wueschheim Air Station, West Germany. It was inactivated on 22 August 1990.-History:...

 TMS (80 missiles) 50°02′37"N 007°25′32"E
  • 303d Tactical Missile Wing - RAF Molesworth
    RAF Molesworth
    RAF Molesworth is a Royal Air Force station located near Molesworth, Cambridgeshire, United Kingdom with a history dating back to 1917.Its runway and flight line facilities were closed in 1973 and demolished to support ground-launched cruise missile operations in the early 1980s...

    , United Kingdom
    United Kingdom
    The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

     (1986-1989)
87th TMS (64 missiles) 52°22′55"N 000°25′41"W
  • 485th Tactical Missile Wing - Florennes Air Base
    Florennes Air Base
    Florennes Air Base is a Belgian Air Component military airfield located in Florennes, a municipality of Belgium. It is home to the 2nd Tactical Wing, operating F-16 Fighting Falcons. It also used to be the home to the Tactical Leadership Programme , a joint training program formed by 10 NATO members...

    , Belgium
    Belgium
    Belgium , officially the Kingdom of Belgium, is a federal state in Western Europe. It is a founding member of the European Union and hosts the EU's headquarters, and those of several other major international organisations such as NATO.Belgium is also a member of, or affiliated to, many...

     (1984-1989)
71st TMS (48 missiles) 50°13′34"N 004°39′01"E
  • 486th Tactical Missile Wing - Woensdrecht Air Base
    Woensdrecht Air Base
    Woensdrecht Air Base is a military airport near the town of Woensdrecht, about 10 km south of the city of Bergen op Zoom in the Netherlands. It is located near highway A58 and the border with Belgium....

    , Netherlands
    Netherlands
    The Netherlands is a constituent country of the Kingdom of the Netherlands, located mainly in North-West Europe and with several islands in the Caribbean. Mainland Netherlands borders the North Sea to the north and west, Belgium to the south, and Germany to the east, and shares maritime borders...

     (1987-1988)
No Tactical Missile Squadron assigned (48 missiles assigned/0 Deployed)51°26′21"N 004°21′09"E
  • 487th Tactical Missile Wing - Comiso Air Base
    Comiso Airport
    Comiso Airport , also known as Vincenzo Magliocco Airport is located in the Sicilian province of Ragusa, 5 km from Comiso and 15 km from Ragusa. It changed from military to civil use during 2005-2008...

    , Italy
    Italy
    Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

     (1983-1991)
302d TMS (112 missiles) 36°59′42"N 014°36′48"E
  • 501st Tactical Missile Wing - RAF Greenham Common
    RAF Greenham Common
    RAF Station Greenham Common is a former military airfield in Berkshire, England. The airfield is located approximately south-southwest of Thatcham; about west of London....

    , United Kingdom
    United Kingdom
    The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

     (1982-1991)
11th TMS
11th Bomb Squadron
The 11th Bomb Squadron is part of the 2d Bomb Wing at Barksdale Air Force Base, Louisiana. It operates B-52 Stratofortress aircraft providing strategic bombing capability.-Mission:...

 (96 missiles) 51°22′42"N 001°18′07"W
  • 868th Tactical Missile Training Squadron
    868th Tactical Missile Training Squadron
    The 868th Tactical Missile Training Squadron is an inactive unit of the United States Air Force. Its last assignment was with the 868th Tactical Missile Training Group, stationed at Davis Monthan Air Force Base, Arizona...

    , Activated 1 July 1981
Re-designated: 868th Tactical Missile Training Group, 1 October 1985
Consisted of: 868th TM Training Squadron, 868th TM Maintenance Squadron, 868th Student Squadron
Davis-Monthan AFB, Arizona
Arizona
Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

, inactivated on 31 May 1990
An area near Fort Huachuca
Fort Huachuca
Fort Huachuca is a United States Army installation under the command of the United States Army Installation Management Command. It is located in Cochise County, in southeast Arizona, about north of the border with Mexico. Beginning in 1913, for 20 years the fort was the base for the "Buffalo...

 was used for field training for GLCM operations

Note: Each GLCM squadron was further subdivided into several flights. Each flight included 2 Launch Control Vehicles (LCC) and 4 Transporter Erector Launchers (TEL), totalling 16 missiles per flight. Each TEL could carry 4 missiles.

See also

  • Tomahawk ALCM & SLCM
    BGM-109 Tomahawk
    The Tomahawk is a long-range, all-weather, subsonic cruise missile. Introduced by General Dynamics in the 1970s, it was designed as a medium- to long-range, low-altitude missile that could be launched from a surface platform. It has been improved several times and, by way of corporate divestitures...

  • SSC-X-4/RK-55
  • List of nuclear weapons (incomplete)

External links

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