The AGM-84H/K SLAM-ER (Standoff Land Attack Missile-Expanded Response) is an advanced stand off precision-guided, air-launched cruise missile produced by Boeing Defense, Space & Security for the United States Armed Forces and their allies. Developed from the AGM-84E SLAM (Standoff Land Attack Missile) (itself developed by Boeing Integrated Defense Systems from the McDonnell Douglas Harpoon antiship missile), the SLAM-ER is capable of attacking land and sea targets medium to long range (155 nautical miles/270 km maximum). The SLAM-ER relies on the Global Positioning System (GPS) and infrared imaging for its navigation and control, and it can strike both moving and stationary targets.
| AGM-84 SLAM-ER |
(Standoff Land Attack Missile - Expanded Response)
|Type||Long-range, air-launched, precision cruise missile|
|Place of origin||United States|
|Used by||United States and its allies|
|Wars||Global War on Terrorism|
|Mass||725 kg (1,598 lb)|
|Length||4.37 m (14.3 ft)|
|Diameter||34.3 cm (13.5 in)|
|Warhead weight||360 kg (800 lb)|
|Engine||Teledyne CAE J402-CA-400|
> 600 lbs thrust
|Wingspan||2.43 m (8.0 ft)|
|270 kilometres (170 mi)|
|Speed||855 km/h (531 mph, 0.700 mach)|
|inertial navigation system supplemented by the Global Positioning System (GPS)|
infrared homing terminal guidance
command guidance data link to controlling aircraft
DSMAC Automatic Target Acquisition (ATA)
F/A-18E/F Super Hornet
F-15E Strike Eagle
P-8 Poseidon 
and allied air forces, including the South Korean Air Force and the Turkish Air Force Past: S-3 Viking,
The SLAM-ER can be remotely controlled while in flight, and it can be redirected to another target after launch if the original target has already been destroyed, or is no longer considered to be dangerous (command guidance). The SLAM-ER is a very accurate weapon; as of 2009 it had the best circular error probable (CEP) of any missile used by the U.S. Navy.
The SLAM-ER obtained initial operating capability in June 2000. A total of three SLAM-ER missiles were fired by the U.S. Navy during the Iraq War, and the missile was also used during Operation Enduring Freedom in Afghanistan.
The General Electric Company provides an Automatic Target Recognition Unit (ATRU) for the SLAM-ER that processes prelaunch and postlaunch targeting data, allows high speed video comparison (DSMAC), and enables the SLAM-ER to be used in a true "fire and forget" manner. It also includes a "man-in-the-loop" mode, where the pilot or weapons system officer can designate the point of impact precisely, even if the target has no distinguishing infrared signature. It can be launched and controlled by a variety of aircraft including the F/A-18 Hornet, F/A-18 Super Hornet, and P-3C Orion, as well as by the U.S. Air Force's F-15E Strike Eagle. Before the retirement of the S-3B Viking, it was also able to launch and control the SLAM-ER. The South Korean air force's version of the F-15E Strike Eagle, the F-15K Slam Eagle, has been capable of launching and controlling the SLAM-ER since 2006 in test exercises.
- Parsch, Andreas. "AGM/RGM/UGM-84." Directory of U.S. Military Rockets and Missiles. 2008. Web. 22 July 2013.
- "AGM-84 Harpoon / SLAM [Stand-Off Land Attack Missile]." Military Analysis Network. Federation of American Scientists, 22 July 2013. Web. 22 July 2013.
- Boeing SLAM-ER Home: Overview
- The US Navy - Fact File: SLAM-ER Missile
- Frost, Patricia. "U.S. Navy Conducts Live Warhead Firing of Boeing SLAM ER". Boeing. Retrieved 21 June 2019.
- Cordesman, Anthony H. The Iraq War: Strategy, Tactics, and Military Lessons. (Washington: CSIS Press, 2003) 296.
- GE - Automatic Target Recognition Unit (ATRU)
- Boeing: "F-15K Makes History with SLAM-ER Release". St. Louis: 27 Mar 2006. Archived 4 February 2012 at the Wayback Machine Web. Accessed 15 Jan 2013.
- "Washington Beef up the Gulf States with 10,000 Strike Weapons Worth US$10 Billion". Defense Update. 17 October 2013. Retrieved 21 October 2013.
- "Republic of Korea Chooses Boeing SLAM-ER Missile". Boeing. Archived from the original on 14 October 2012. Retrieved 20 July 2013.
- "SLAM-ER and Harpoon Foreign Military Sales".
- US Navy Fact File: SLAM-ER
- Boeing (McDonnell-Douglas) AGM/RGM/UGM-84 Harpoon, Designation Systems
- SLAM-ER, Boeing