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The Harpoon is an all-weather, over-the-horizon, anti-ship missile manufactured by McDonnell Douglas (now Boeing Defense, Space & Security). The AGM-84E Standoff Land Attack Missile (SLAM) and later AGM-84H/K SLAM-ER (Standoff Land Attack Missile – Expanded Response) are cruise missile variants.
The regular Harpoon uses active radar homing and flies just above the water to evade defenses. The missile can be launched from:
The Harpoon has also been adapted for carriage on several aircraft, including the P-3 Orion, the P-8 Poseidon, the AV-8B Harrier II, the F/A-18 Hornet and the U.S. Air Force B-52H bombers. The Harpoon was purchased by many nations, including India, Japan, Singapore, South Korea, Taiwan, the United Arab Emirates and most NATO countries.
The Royal Australian Air Force can fire AGM-84-series missiles from its F/A-18F Super Hornets. AP-3C Orion, and P-8 Poseidon aircraft, and previously from the now retired F-111C/Gs and F/A-18A/B Hornets. The Royal Australian Navy deploys the Harpoon on major surface combatants and in the s. The Spanish Air Force and the Chilean Navy are also AGM-84D customers, and they deploy the missiles on surface ships, and F/A-18s, F-16 Falcons, and P-3 Orion aircraft. The British Royal Navy formerly deployed the Harpoon on several types of surface ships, they were phased out starting in 2023 and replaced with the Naval Strike Missile which has twice the range of a Harpoon and is about 20% faster.
The Royal Canadian Navy carries Harpoon Block II missiles on its s.
The Republic of Singapore Air Force also operates five modified Fokker 50 Maritime Patrol Aircraft (MPA) which are fitted with the sensors needed to fire the Harpoon missile. The Pakistani Navy carries the Harpoon missile on its frigates and P-3C Orions. The Turkish Navy carries Harpoons on surface warships and Type 209 submarines. The Turkish Air Force will be armed with the SLAM-ER. Turkey is planning to replace the Harpoons with Turkish made Atmaca missiles.
At least 339 Harpoon missiles were sold to the Republic of China Air Force (Taiwan) for its F-16 A/B Block 20 fleet and the Republic of China Navy, which operates four guided-missile destroyers and eight guided-missile frigates with the capability of carrying the Harpoon, including the eight former U.S. Navy s and the four former USN s which have been sold to Taiwan. The two / Hai Lung submarines and 12 P-3C Orion aircraft can also use the missile. The eight s, despite being based on the US , have Harpoon capabilities deleted from their combat systems, and funding to restore it has so far been denied, the Republic of China Navy (Taiwan) decided to switch to the Hsiung Feng II and Hsiung Feng III.
The Block 1 missiles were designated A/R/UGM-84A in US service and UGM-84B in the UK. Block 1B standard missiles were designated A/R/UGM-84C, Block 1C missiles were designated A/R/UGM-84D. Block 1 used a terminal attack mode that included a pop-up to approximately before diving on the target; Block 1B omitted the terminal pop-up; and Block 1C provided a selectable terminal attack mode.
The key improvements of the Harpoon Block II are obtained by incorporating the inertial measurement unit from the Joint Direct Attack Munition program, and the software, computer, Global Positioning System (GPS)/inertial navigation system and GPS antenna/receiver from the SLAM Expanded Response (SLAM-ER), an upgrade to the SLAM.
The US Navy awarded a $120 million contract to Boeing in July 2011 for the production of about 60 Block II Harpoon missiles, including missiles for 6 foreign militaries.
India acquired 24 Harpoon Block II missiles to arm its maritime strike SEPECAT Jaguar fighters in a deal worth $170 million through the Foreign Military Sales system.
In December 2010, the Defense Security Cooperation Agency (DSCA) notified U.S. Congress of a possible sale of 21 additional AGM-84L Harpoon Block II Missiles and associated equipment, parts and logistical support for a complete package worth approximately $200 million for the Indian Navy's P-8I Neptune fleet.
The Indian Navy is also planning to upgrade the fleet of four submarines – – with tube-launched Harpoon missiles. On 1 July 2014 DSCA approved the sale of 12 UGM-84L Harpoon Block II Encapsulated Missiles, 10 UTM-84L Harpoon Encapsulated Training missiles, 2 Encapsulated Harpoon certification training vehicles, containers, spare and repair parts for Shishumar-class submarines. On 24 September 2016, the US Department of Defence contracted Boeing a deal worth $81,271,024 for the missiles. The deal would be executed by 2018.
In April 2020, DSCA approved the sale of 10 AGM-84L Harpoon missiles along with containers, spare and repair parts, support and test equipment for the P-8I fleet to the Indian Navy at a value of $93 million. The sale of Mark 54 lightweight torpedo was approved simultaneously.
It was reported in April 2023 that the Indian Navy would be purchasing equipment for Harpoon missiles worth $80 million. It includes the sale of the Harpoon Joint Common Test Set (JCTS) and related equipment.
Harpoon Block II missiles are designated A/R/UGM-84L.
In early 2018, the U.S. State Department approved the sale of Harpoon Block II to the Mexican Navy for use on their future Sigma-class design frigates, the first of which is being built by Damen Schelde Naval Shipbuilding.
In November 1980, during Operation Morvarid, Iranian missile boats attacked and sank two Iraqi s; one of the weapons used was the Harpoon missile.
In 1986, the United States Navy sank at least two Libyan in the Gulf of Sidra. Two Harpoon missiles were launched from the cruiser with no confirmed results and several others from A-6 Intruder aircraft that were said to have hit their targets. Initial reports claimed that USS Yorktown scored hits on a patrol boat, but action reports indicated that the target may have been a false one and that no ships were hit by those missiles. In 1988, Harpoon missiles were used by the U.S. to sink the Iranian frigate Sahand during Operation Praying Mantis. Another was fired at the Iranian Kaman-class missile boat Joshan, but failed to strike because the fast attack craft had already been mostly sunk by RIM-66 Standard missiles. An Iranian-owned Harpoon missile was also fired at the guided missile cruiser . The missile was successfully lured away by chaff.
In December 1988, a Harpoon launched by an F/A-18 Hornet fighter from the aircraft carrier killed one sailor when it struck the merchant ship Jagvivek, a long Indian-owned ship, during an exercise at the Pacific Missile Range near Kauai, Hawaii. A Notice to Mariners had been issued warning of the danger, but Jagvivek left port before receiving the communication and subsequently strayed into the test range area, and the Harpoon missile, loaded just with an inert dummy warhead, locked onto it instead of its intended target.
The UGM-84A undersea-launched Harpoon version was retired from U.S. Navy service in 1997, leaving the U.S. submarine force without an anti-ship missile, a capability that is not planned to be reintroduced until the Block IV Tomahawk is modified with a moving target maritime attack feature in 2021. During RIMPAC 2018 a UGM-84 Harpoon was fired by USS Olympia at the ex-USS Racine. The U.S. Navy plans to refurbish and recertify UGM-84 Harpoon missiles to reintroduce the capability to s. A $10 million contract was awarded to Boeing in January 2021 to deliver the missiles by the end of the year.
In June 2009, it was reported by an American newspaper, citing unnamed officials from the Obama administration and the U.S. Congress, that the U.S. government had accused Pakistan of illegally modifying some older Harpoon missiles to strike land targets. Pakistani officials denied this and they claimed that the US was referring to a new Pakistani-designed missile. Some international experts were also reported to be skeptical of the accusations. Robert Hewson, editor of Jane's Air Launched Weapons, pointed out that the Harpoon is not suitable for the land-attack role due to deficiency in range. He also stated that Pakistan was already armed with more sophisticated missiles of Pakistani or Chinese design and, therefore, "beyond the need to reverse-engineer old US kit." Hewson offered that the missile tested by Pakistan was part of an undertaking to develop conventionally armed missiles, capable of being air- or surface-launched, to counter its rival India's missile arsenal. It was later stated that Pakistan and the US administration had reached some sort of agreement allowing US officials to inspect Pakistan's inventory of Harpoon missiles, and the issue had been resolved.
The Harpoon missile has also emerged as a preferred choice for several foreign countries under the Foreign Military Sales (FMS) route. In 2020 its manufacturer Boeing won two major contracts for supplying Harpoon missiles to Saudi Arabia and six other partner nations under a $3.1 billion deal.
India will also receive Harpoon missiles under FMS in a $155 million deal.
In late May 2022, Denmark sent Harpoon launchers and missiles to Ukraine to help their war effort, and shortly after, the Netherlands sent additional missiles. In mid-June 2022, the U.S. announced that they would supply Ukraine with Harpoon launchers and missiles, and the U.K. Defense Ministry said that they also were looking into supplying Ukraine with the missiles. On 17 June, Ukraine claimed its navy had sunk the tugboat with two Harpoon missiles. In a tweet they said "Spasatel Vasily Bekh, a tug of the Russian Black Sea Fleet, successfully demilitarized by the @UA_NAVY. The ship was transporting personnel, weapons and ammunition to the occupied Snake Island." Ukraine's Naval Command also claimed the Russian tugboat had a Tor missile system on board.
In May 2025 the United States Special Operations Command (SOCOM) announced that the Air Force Special Operations Command (AFSOC) has been conducting field tests to deploy the Harpoon from the AC-130J Ghostrider gunship since 2024. Due to increasing tensions with Russia, China, North Korea and Iran, fielding the Harpoon would give the AC-130 an all-new dedicated standoff anti-ship capability, an ability that would be advantageous in any future large-scale naval conflicts in the Pacific and Indian Ocean.
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