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63-492: The BGM-71 TOW ("Tube-launched, Optically tracked, Wire-guided ", pronounced / ˈ t oʊ / ) is an American anti-tank missile . TOW replaced much smaller missiles like the SS.10 and ENTAC , offering roughly twice the effective range, a more powerful warhead, and a greatly improved semi-automatic command to line of sight (SACLOS) that could also be equipped with infrared cameras for night time use. First produced in 1970, TOW

126-653: A captured American-made M41 operated by the PAVN). On 9 May, elements of the PAVN's 203rd Armored Regiment assaulted Ben Het Camp held by Army of the Republic of Vietnam (ARVN) Rangers . The Rangers destroyed the first three PT-76 amphibious light tanks of the 203rd, thereby breaking up the attack. During the battle for the city of Kontum , the TOW missile had proven to be a significant weapon in disrupting PAVN tank attacks within

189-517: A gun barrel directly into the view of the tracker. Earlier manual weapons like SS.10 and ENTAC flew upwards after launch to clear the ground when being launched by infantry lying on the ground, and thus would not be immediately visible along the line-of-sight. To ensure the HAW could be tracked successfully, it would have to be launched from a tube, like Shillelagh, but one that was lightweight to ensure mobility. Finally, Shillelagh sent guidance commands to

252-406: A larger 5.9 kg (13 lb) warhead with a 21.25 in (540 mm) extensible probe, improved resistance to jamming with a second, shorter wavelength xenon tracking beacon and optical encoders to randomly modulate the pulse frequency of both beacons and a motor that provided around 30% more thrust. This was followed by the TOW 2A/B, which appeared in 1987. Hughes developed a TOW missile with

315-662: A major problem in the short term, TOW simply dropped the helicopter-launch requirement. When the BRL team returned the HAW/TOW study, the Pentagon gave them six months to come up with an actual requirement instead of a list of desirable features. Reed gathered submissions from the industry and quickly selected three contractors for further details, Hughes Aircraft , Martin Marietta , and McDonnell Douglas . All three companies concluded

378-401: A name that the system carried into production. One problem that was noted early on was that the tube launch would make it difficult for the missile to be launched from a helicopter unless it was pointed relatively directly toward the target. Earlier systems were manually guided and did not need to be "gathered" quickly, so these were easier to launch at high crossing angles. Seeing this might be

441-434: A new project started under the codename Orange William . This system used a computer to calculate the impact point, sending commands to the missile using an infrared link. But the link was found not to work in smoke or dust, making it largely useless on the battlefield. A new design emerged, combining the guidance system of the small Vickers Vigilant with a new and highly maneuverable missile to produce Swingfire . The goal

504-403: A rocket that was split into two outlet tubes that were angled downward to give the missile natural lift during flight. The initial production contract was awarded to Hughes on 28 June 1968, and the final contract on 29 November 1968. On 10 June 1969, Chrysler's Huntsville Division was awarded the second-source contract. Many problems emerged with the initial design, notably the early versions of

567-469: A special nose cap that increases range to 4.5 km. TOW-2B has top attack capability. Although this missile has been in production since 2004, no U.S. Army designation has yet been assigned. Wireless versions of the TOW-2A, TOW-2B, and TOW-2B Aero have been developed that use a "stealthy" one-way radio link, identified with the suffix "RF". These missiles require no special alterations to the launcher since

630-513: A weapon concept, and instead spend the next two years studying the problem while researching the possibility of using alternative guidance systems and continually watching foreign developments where the US was lagging. It was at some point during this early development that the British became aware of the US developments. Having approved Swingfire to some degree based on the possibility of foreign sales,

693-693: A weapon to be delivered sometime between 1965 and 1970. BRL assigned the work to the Armored Systems Evaluation Branch of the Weapon Systems Laboratory. David Hardison, the Branch Chief, reconvened the Ad Hoc panel to review a long list of twenty-seven design proposals, all of which were found lacking. Hardison then began preparing a list of the ideal characteristics of a HAW weapon. Of primary importance

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756-509: A wireless data link in 1989, referred to as TOW-2N, but this weapon was not adopted for use by the U.S. military. Raytheon continued to develop improvements to the TOW line, but its FOTT (Follow-On To TOW) program was canceled in 1998, and its TOW-FF (TOW-Fire and Forget) program was cut short in 2002 because of funding limitations. In 2001 and 2002, Raytheon and the U.S. Army worked together on an extended range TOW-2B variant, initially referred to as TOW-2B (ER), but now called TOW-2B Aero, which has

819-646: A workable version of the SS.10, as well as the extended-range SS.11 . In the summer of 1958, the development of the Dart was canceled in favor of purchasing the two French designs. During the same period, the British Army had been developing its heavyweight long-range weapon with Australia, the Malkara , with a range of about 4,000 yards (3,700 m). The tracking system, similar to the SS.11, proved difficult to use and

882-658: Is called the SABER). The ITAS, in addition to providing better anti-armor capabilities to antitank units, also has capabilities that make it an integral part of the combined arms team. Even when organized in heavy—light task forces, where the preponderance of antiarmor capabilities traditionally has resided in the heavy elements, TOW ITAS-equipped antitank units can not only destroy threat targets but also provide superior reconnaissance, surveillance, and target acquisition (RSTA), rear area protection, and urban operations capabilities. The TOW ITAS consists of three new line replaceable units:

945-620: Is one of the most widely used anti-tank guided missiles . It can be found in a wide variety of manually carried and vehicle-mounted forms, as well as widespread use on helicopters . Originally designed by Hughes Aircraft in the 1960s, the weapon is currently produced by RTX . Late in World War II , the German Army began experimenting with modified versions of the Ruhrstahl X-4 wire-guided missile . Originally developed for

1008-598: Is seeking a replacement for the TOW through the Close Combat Missile System-Heavy (CCMS-H) effort. Objectives are for a weapon with increased range out to 10,000 m (6.2 mi) or more, as well as greater speed, the ability to fire on the move, and lock on before and after launch capability while retaining similar launcher size and arming distance. The Army hopes to field the CCMS-H sometime between 2028 and 2032. In 1997, Raytheon purchased

1071-523: The Luftwaffe as an anti-bomber weapon, by changing the warhead to one using a high-explosive anti-tank (HEAT) design, the new X-7 version made an effective anti-armor weapon with a range of hundreds of meters. This would greatly improve the effectiveness of infantry anti-tank operations, which at that time were generally based on smaller weapons like the Panzerfaust and Panzerschreck , limited in

1134-441: The 1982 Lebanon War . On 11 June, Israeli anti-tank teams armed with TOW ambushed Syrian armored forces and destroyed many Syrian Soviet -made T-72 tanks. Estimates vary regarding the number of T-72s destroyed by TOWs (vs. the number destroyed by Merkava MBTs ), with the lower end at nine and the high end attributing "the majority" of the 30 T-72s destroyed by Israeli forces in the war to Yossi Peled 's anti-tank TOW units. This

1197-641: The AGM-22B then in service as a heliborne anti-tank weapon. On 24 April 1972, the U.S. 1st Combat Aerial TOW Team arrived in South Vietnam ; the team's mission was to test the new anti-armor missile under combat conditions. The team consisted of three crews, technical representatives from Bell Helicopter and Hughes Aircraft , members of the United States Army Aviation and Missile Command , and two UH-1B helicopters; each mounting

1260-765: The M151 jeep , the M113 APC , the M966 HMMWV and the M1045 HMMWV (which replaced the M966). These launchers are theoretically man-portable but are quite bulky. The updated M151 launcher was upgraded to include thermal optics to allow nighttime usage and had been simplified to reduce weight. The M220 was specifically developed to handle the TOW-2 series. TOW systems have also been developed for vehicle-specific applications on

1323-911: The M2/M3 Bradley IFV/CFV , the LAV-AT , the M1134 Stryker ATGM carrier, and the now-retired M901 ITV (improved TOW vehicle); they are generally referred to as TOW under armor (TUA). In helicopter applications, the M65 system used by the AH-1 series is the primary system deployed, but the XM26 system was developed for the UH-1, and a system was put into development for the later canceled AH-56 helicopter. TOW has also been used with AH.1 (TOW) and AH.7 variants of Westland Lynx helicopters, with

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1386-498: The MGM-51 Shillelagh missile demonstrated that the simplest solution to successfully tracking the missile was to optically track a flare attached to the missile using an infrared seeker . This was essentially identical to a heat seeking missile , but tracking its own missile rather than a separate target. Flares, however, were not ideal illumination sources, especially in the case where multiple rounds might be fired and

1449-589: The Yom Kippur War of 1973. Wire guidance has remained the main system for most smaller weapons although newer systems such as laser beam riding have come into use in anti-aircraft and some anti-tank use roles (such as the US Hellfire missile and the Russian 9M133 Kornet ). Some torpedoes can be wire-guided, such as the U.S. Mk 48 Advanced Capability (ADCAP) torpedo, Russian UGST torpedo, or

1512-491: The " dogfights " between Iranian SeaCobras and Iraqi Mil Mi-24s , Iranians achieved several "kills", usually using TOW missiles. Wire-guided missile The longest range wire-guided missiles in current use are limited to about 8 km (5.0 mi). Electrical wire guidance dates back to the early 20th century with an early example being the Lay Torpedo . A prototype ground-based electrical wire-guided torpedo

1575-568: The IR optics is a modern SADA-II electrically powered cryocooler, removing the need to carry a supply of high-pressure coolant gas cartridges as was necessary for the previous AN/TAS-4 and AN/TAS-4A night sights. The most recent addition to the ITAS system is the ITAS-FTL (far target location), which incorporates a new module called PADS (position attitude determination subsystem), a device that attaches to

1638-552: The RF transmitter is encased along with the missile and uses the standard umbilical data connector. In 1999, TOW received the Improved Target Acquisition System (ITAS). The TOW missile in its current variations is not a fire-and-forget weapon and like most second-generation wire-guided missiles has Semi-Automatic Command Line of Sight guidance. This means that the guidance system is directly linked to

1701-520: The Shillelagh. A series of presentations by both missile teams followed, and ultimately the decision was made to continue both programs in September 1970. Three designs were returned for the initial selection, from Hughes, McDonnell, and Martin. Hughes' design used pop-out fins and a gyroscope to allow it to automatically maintain an "up" direction. The wire spools were licensed from Bofors and

1764-576: The TOW 2B Aero, and the BGM-71H TOW Bunker Buster. By 2013, the U.S. Marine Corps had retired the air-launched TOW missile. TOW is designated as a BGM by the U.S. military: a multiple launch environment (B) surface attack (G) guided missile (M). The B launch environment prefix is used only when the system can be essentially unmodified when launched from a variety of launch platforms. The M151 and M220 launchers are used by infantry, but can also be mounted on some vehicles, including

1827-626: The TOW had replaced the Army's existing heavy anti-tank weapon, the M40 recoilless rifle . It increasingly replaced the French ENTAC missiles purchased earlier. In December 1963 the issue of helicopter launches was once again considered. The problem with the existing semi-automatic systems was that the missile had to be "gathered" by the optical tracker quickly for it to send commands to the missile. In contrast, earlier all-manual systems could be guided by

1890-589: The XM26 TOW weapons system, which had been taken from storage. After displacing to the Central Highlands for aerial gunnery, the unit commenced daily searches for enemy armor. On 2 May 1972, U.S. Army UH-1 Huey helicopters firing TOWs destroyed North Vietnamese People's Army of Vietnam (PAVN) tanks near An Loc . This was heralded as the first time a U.S. unit neutralized enemy armor using American-designed and built guided missiles (in this case, against

1953-602: The XM65 TOW, and the final development contract, the first 100 percent cost-plus-incentive-fee, was signed on 3 May 1963. This led to the TOW Project Office opening on 1 October 1964. The British learned of the TOW program when it was sent to MICOM. In May, the US suggested they abandon Swingfire in favor of TOW, pointing out that the French were also introducing a long-range missile, and with three similar weapons in

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2016-470: The attachment of two pylons, each carrying four missiles. The M41 TOW improved target acquisition system (ITAS) is a block upgrade to the M220 ground/high-mobility multipurpose wheeled vehicle (HMMWV)-mounted TOW 2 missile system. The TOW ITAS is currently being fielded to airborne, air assault, and light infantry forces throughout the active and reserve components of the U.S. Army and U.S. Marine Corps (where it

2079-522: The best case to ranges on the order of 150 metres (490 ft). X-7 was never fully developed before the war ended. In the immediate post-war era, the design was picked up by development teams in France and Australia. In France, Nord Aviation 's Jean Bastien-Thiry developed an updated version of the X-7 using a solid fuel rocket as the very small and highly portable SS.10 . Development started in 1948, with

2142-582: The concept was able to be produced. On 12 January 1962, the BRL officially assigned the development of the TOW concept to the U.S. Army Missile Command (MICOM), who in turn formed the Antitank/Aircraft Weapons Commodity Office on 19 November 1962. In December 1962, Hughes was instructed to continue development while a development contract was being drawn up. Budget approval for development was granted in January 1963 as

2205-565: The emergence of a possible US competitor was a concern. Meetings between Solly Zuckerman and John H. Rubel led to the July 1961 Rubel-Zuckerman agreement, wherein the UK would continue development of the long-range Swingfire while the US concentrated on shorter-range missiles, up to 1,000 metres (3,300 ft), with new guidance systems. The US agreed to not introduce a system that competed directly with Swingfire or Vigilant without prior consultation but

2268-446: The first four wings just forward of the flight motor spring open forward, followed by four tail control surfaces, which flip open rearwards as the missile completely exits the launch tube. As the wings fully extend at about 7 meters from the launcher, the flight motor ignites, boosting the missile's speed to approximately 600 miles per hour (~1,000 kilometers per hour) during its burn time. At 0.18 seconds after launch, around 65 meters from

2331-587: The first rounds fired in 1952. Evaluations by the US Army in 1953 concluded it was not ready for operation, but that its progress should be tracked. The Army then instructed the Redstone Arsenal to develop its own version of the basic concept, which emerged as the SSM-A-23 Dart , a larger design with roughly twice the range of the SS.10. While the development of the Dart continued, Nord delivered

2394-614: The form of a complete system combining the sighting system, launcher tube assembly, and all related equipment as the XM26 weapon system. Hughes won the contest in 1965 and was awarded a second development contract for XM26 in June 1966. XM26 was initially developed by a separate organization within BRL, the Aircraft Weapons Commodity Office. This was assigned to the TOW Project Office on 5 April 1970. The U.S. Army

2457-455: The gunner at any time. With the TOW being launched from a tube, some other system would be needed to ensure it could be guided into the optics field of view after launch. This would be all the more difficult if the helicopter was not flying directly at the target, or was maneuvering. MICOM sent contracts to both Hughes and Philco Ford , makers of the Shillelagh, to develop stabilized launch sights for their respective missile designs. They were in

2520-431: The launcher, the warhead is armed by G-forces from acceleration by the flight motor, a safety feature intended to protect the operator if the flight motor fails to ignite. The flight motor burns out 1.6 seconds after launch, with the missile gliding for the remainder of its flight time. After the tracker captures the missile, IR sensors bore-sighted to the daylight tracker continuously monitor the position of an IR beacon on

2583-573: The marketplace, the British would find foreign sales difficult. However, the British Army was convinced that the launch vehicle would only survive if it was completely undercover, and TOW required the launcher to remain in sight of the target through the entire flight of the missile. They continued the development of Swingfire. In 1969, the House Authorization Subcommittee considered ending the TOW program in favor of

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2646-548: The missile body as it spun. The IR detector was placed at the end of a vertical V-shaped channel in the launcher. As gravity pulled the missile downward, it would begin to be blocked by the lower side of the V, causing the system to send commands to pull the missile upward. When it reached the top of the view at the end of the V, it stopped the up commands. The result was that the missile bounced up and down 2 feet (0.61 m) every 400 metres (1,300 ft) of flight. Finally, Martin's missile used two side-mounted swept-back wings and

2709-481: The missile systems division of Hughes Electronics from General Motors Corporation, so the development and production of TOW systems now come under the Raytheon brand. The weapon is used in anti-armor, anti-bunker, anti-fortification and anti-amphibious landing roles. TOW is in service with over 45 militaries and is integrated on over 15,000 ground, vehicle and helicopter platforms worldwide. In its basic infantry form,

2772-468: The missile using an infrared link, but as the British had discovered, this proved relatively unreliable in the field and was subject to countermeasures like random flashing IR lamps. For the shorter ranges envisioned for HAW, wire guidance was perfectly suitable and both much less expensive and largely immune to countermeasures. The resulting design was tube-launched, optically tracked, and wire-guided. BRL programmer Harry Reed immediately christened it "TOW",

2835-481: The missile's tail relative to the line-of-sight, with the FCS generating course corrections which are sent via the command link to the missile's integral flight control unit. The missile then corrects its flight path via the control surface actuators. The operator keeps the sight's crosshair centered over the target until impact: if the missile fails to strike a target, the command wires are automatically cut at 3,000 meters on

2898-415: The optical system might track the wrong one. In place of the flare, the panel selected an infrared (IR) lamp whose output would be modulated with a shutter so each missile would have a unique signal. Using this style of guidance demanded that the missile be brought into the line-of-sight of the tracking system as soon as possible; in Shillelagh this was almost immediate because the missile was launched from

2961-490: The original TOW and 3,750 meters on most current-production TOWs. An automatic wire cut also occurs if the tracker fails to detect the missile's thermal beacon within 1.85 seconds of launching. The TOW missile was continually upgraded, with an improved TOW missile (ITOW) appearing in 1978 that had a new warhead triggered by a long probe, which was extended after launch, that gave a stand-off distance of 15 in (380 mm) for improved armor penetration. The 1983 TOW 2 featured

3024-527: The platform, and requires that the target be kept in the shooter's line of sight until the missile impacts. A fire-and-forget TOW variant (TOW-FF) was under development but was canceled by the Army in 2002. In October 2012, Raytheon received a contract to produce 6,676 TOW (wireless-guided) missiles for the U.S. military. Missiles that will be produced include the BGM-71E TOW 2A, the BGM-71F TOW 2B,

3087-574: The region. By the end of May, BGM-71 TOW missiles had accumulated 24 confirmed kills of both PT-76 light and T-54 main battle tanks. On 19 August, the ARVN 5th Infantry Regiment, 2nd Division abandoned Firebase Ross in the Que Son Valley , 30 miles (48 km) southwest of Da Nang, to the PAVN 711th Division . A dozen TOW missiles were left with abandoned equipment and fell into PAVN hands. The Israel Defense Forces used TOW missiles during

3150-504: The rocket motor was made by Hercules. Guidance would be via flare tracking, using an internally-designed IR sensor based on their AIM-4 Falcon efforts. McDonnell's entry did not attempt to control the spin of the missile, deliberately allowing it to spin during launch and flight like an artillery shell to improve accuracy. Like the Hughes entry, a gyroscope was used to define the up direction; in this case, this constantly changed relative to

3213-461: The rocket motors which sometimes ejected burning bits of fuel, presenting a hazard to the gunners. MICOM suggested a new motor using "head end suspended double base" fuel from the M72 LAW which solved this problem. The IR source had problems due to its use of a fine metal filament that ignited the arc lamp which often broke during firing. Repeated tests and modifications solved this. The launch tube

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3276-479: The system breaks down into some modules: a folding tripod mount, a launch tube (into the rear of which encased missiles are inserted), a mandatory daylight tracker unit, which can be augmented with an optional AN/TAS-4 or AN/TAS-4/A gas-cooled night sight (or an all-in-one tracker unit on the M41 ITAS version), and a traversing unit, which mounts onto the tripod and carries the launch tube and sight, that also includes

3339-590: The target acquisition subsystem (TAS), the fire control subsystem (FCS), and the lithium battery box (LBB); a modified TOW 2 traversing unit; the existing TOW launch tube and tripod; and a TOW Humvee modification kit. The TAS integrates into a single housing the direct view optics and missile tracker, a second-generation forward looking infrared (FLIR) night vision sight (NVS), and a laser rangefinder . TAS electronics provide automatic boresighting for these components, eliminating both tactical collimation and 180-day verification requirements. The integral cooling system for

3402-571: The top of the ITAS sighting unit and uses differential GPS tracking to relay precise coordinate data to the operator. In 1968, a contract for full-scale production was awarded to Hughes, and by 1970 the system was being fielded by the U.S. Army. When adopted, the BGM-71 series replaced the M40 106 mm recoilless rifle and the MGM-32 ENTAC missile system then in service. The missile also replaced

3465-411: The trigger is pulled, there is a 1.5-second firing delay while the missile spins up its internal gyroscope and the thermal battery reaches operating temperature. Once this concludes, the launch motor fires through the rear nozzle propelling the missile from the tube: this soft-launch motor fires for only 0.05 seconds and burns out before the missile has exited the tube. As the missile exits the launch tube,

3528-404: The weapon's trigger and the bridging clamp, which mates with the missile's umbilical data connector. In addition to this main assembly, there is a separate fire control system (FCS) module, which performs all guidance calculations, and a battery pack to power the system. These two modules link to each other, with the FCS then linked to the daylight tracker by a cable. When the target is sighted and

3591-737: Was built by the Germans during World War II . The pair of deployed German guided air-delivered ordnance designs, the Fritz X and Henschel Hs 293 , both used the Kehl-Strassburg radio guidance system for control. However, because the British proved to be able to develop countermeasures to interfere with the Germans' use of the Kehl-Strassburg ordnance guidance system, rushed projects were started in 1944 in order to develop alternatives. The first system to be modified in this fashion

3654-487: Was designed to be sealed at both ends, with the rear seal being blown off by the rocket motor and the front by pressurized gas released by the guidance system's gyroscope. In practice, both proved unreliable, but remedial action solved the problems. Production began at USAF Plant #44 and the first production examples were delivered in August 1969. In September 1970 three training battalions had formed, and by 30 September 1970,

3717-591: Was free to develop new unguided "assault weapons" to replace the LAW. Both the US and Canadian Army agreed to purchase Swingfire for the long-range role. Despite the efforts to reach an agreement over anti-tank missiles, in the early summer of 1961, the Chief of Ordnance asked BRL to deliver a formal definition for what was then known as the "Heavy Assault Weapon for the Long Range period", or HAW for short. They asked for

3780-501: Was probably the first encounter of the American anti-tank missile with the newer Soviet tank. In the Iran–Iraq War of the 1980s, the Islamic Republic of Iran Army used TOW missiles purchased before the Iranian Revolution in 1979, as well as those purchased during the Iran–Contra affair . Of the 202 AH-1J Internationals (export variant of the AH-1J SeaCobra) that Iran purchased from the US, 62 were TOW-capable. Iranian AH-1Js managed to slow down Iraqi tank advances into Iran. During

3843-423: Was the Henschel Hs 293 anti-ship missile . Other examples included the X-4 missile . The X-7 influenced other military thinkers after the war. By the early 1950s a number of experimental systems had been developed (for example, Malkara missile ), leading to their widespread deployment in the late 1950s and early 1960s. Large numbers of Israeli tanks were destroyed using wire-guided AT-3 Sagger missiles during

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3906-405: Was the adoption of some form of semi-automatic guidance, as the manual guidance systems ( MCLOS ) of earlier weapons like SS.11 were found to be difficult to use as the relative movements of the launcher and target increased; MCLOS worked well for stationary launchers and slow-moving targets but had proven much more difficult to use from moving vehicles, and especially helicopters . Experience with

3969-592: Was to allow the launcher to remain completely undercover while a gunner took a portable sight forward to aim at the targets from a concealed location. In the fall of 1958, the Army's Office of Ordnance Research and Development formed the Ad Hoc Working Group at the Ballistic Research Laboratories (BRL) to define a future replacement for the SS.10 and 11. The team included members from Picatinny Arsenal , Frankford Arsenal , Redstone Arsenal , Watervliet Arsenal , Detroit Arsenal and Harry Diamond Laboratories . The group almost immediately decided not to attempt to define

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