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Mark 84
Type	Low-drag general-purpose bomb
Place of origin	United States
Service history
In service	Since 1950s
Used by	United States Israel
Production history
Manufacturer	General Dynamics Ordnance and Tactical Systems
Unit cost	US$16,000
Variants	GBU-10 Paveway II GBU-15 GBU-24 Paveway III GBU‐31 JDAM
Specifications
Mass	2,039 lb (925 kg)
Length	12 ft 7 in (3.84 m)
Diameter	18 in (460 mm)
Filling	Tritonal, H6 or PBXN-109
Filling weight	946 lb (429 kg)
References	Janes and The War Zone

The Mark 84 or BLU-117 is a 2,000-pound (900 kg) American general purpose aircraft bomb. It is the largest of the Mark 80 series of weapons. Entering service during the Vietnam War, it became a commonly used US heavy unguided bomb. At the time, it was the third largest bomb by weight in the US inventory behind the 15,000-pound (6,800 kg) BLU-82 "Daisy Cutter" and the 3,000-pound (1,400 kg) M118 "demolition" bomb. It is currently sixth in size due to the addition of the 5,000 lb (2,300 kg) GBU-28 in 1991, the 22,600 lb (10,300 kg) GBU-43/B Massive Ordnance Air Blast bomb (MOAB) in 2003, and the 30,000 lb (14,000 kg) GBU-57A/B Massive Ordnance Penetrator (MOP).

Development and use

The Mark 84 has a nominal weight of 2,000 lb (907 kg), but its actual weight varies depending on its fin, fuze options, and retardation configuration, from 1,972 to 2,083 lb (894 to 945 kg). It is a streamlined steel casing filled with 945 lb (429 kg) of tritonal high explosive.

The Mark 84 can form a crater 50 feet (15 m) wide and 36 ft (11 m) deep. It can penetrate up to 15 inches (38 cm) of metal or 11 ft (3.4 m) of concrete, depending on the height from which it is dropped, and causes lethal fragmentation to a radius of 400 feet (120 m).

Many Mark 84s have been retrofitted with stabilizing and retarding devices to provide precision guidance capabilities. They serve as the warhead of a variety of precision-guided munitions, including the GBU-10/GBU-24/GBU-27 Paveway laser-guided bombs, GBU-15 electro-optical bomb, GBU-31 JDAM and Quickstrike sea mines. The HGK is a Turkish guidance kit used to convert 2000-lb Mark 84 bombs into GPS/INS guided smart bombs.

According to a test report conducted by the United States Navy's Weapon System Explosives Safety Review Board (WSESRB) established in the wake of the 1967 USS Forrestal fire, the cooking off time for a Mk 84 is about 8 minutes 40 seconds.

Deployment in wars

MK 84 were used by U.S. forces in the Vietnam War, Operation Desert Storm, Iraq War and Afghanistan War and bombing of Yugoslavia in 1999, and by Israel in the 2014 Gaza War and 2023-2024 Gaza War.

According to a forensic investigation by Human Rights Watch, MK 84 bombs were also in the Saudi-led intervention in the Yemeni civil war.

In 2023 and 2024, the United States transferred over 14,000 Mark 84 bombs to Israel. They have been used extensively in the Gaza Strip during the Israel–Hamas War. At least one of the bombs was used in the 13 July 2024 al-Mawasi attack that killed Hamas commander Rafa Salama and 90+ civilians.

According to the US Senator Mark Kelly, Israel used a bomb of this type in the assassination of Hassan Nasrallah, leader of Hezbollah, in Lebanon on September 27, 2024.

See also

• BLU-109 bomb
• BLU-116
• Mark 81 bomb
• Mark 82 bomb
• Mark 83 bomb

References

1. Janes (26 July 2022), "Mk 80 general-purpose bombs (BLU-110/111/117/126/129)", Janes Weapons: Air Launched, Coulsdon, Surrey: Jane's Group UK Limited., retrieved 29 May 2023
2. Janes (29 November 2022), "GBU-10/12/16/58 Paveway II", Janes Weapons: Air Launched, Coulsdon, Surrey: Jane's Group UK Limited., retrieved 29 May 2023
3. Janes (21 November 2022), "GBU-15 modular guided weapon", Janes Weapons: Air Launched, Coulsdon, Surrey: Jane's Group UK Limited., retrieved 29 May 2023
4. Janes (1 December 2022), "GBU-22, GBU-24, GBU-27 Paveway III, and Enhanced Paveway III", Janes Weapons: Air Launched, Coulsdon, Surrey: Jane's Group UK Limited., retrieved 29 May 2023
5. Janes (29 November 2022), "GBU-31/32/38 Joint Direct Attack Munition (JDAM)", Janes Weapons: Air Launched, Coulsdon, Surrey: Jane's Group UK Limited., retrieved 29 May 2023
6. Newdick, Thimas; Rogoway, Tyler (15 December 2022). "What Joint Direct Attack Munitions could do for Ukraine". The War Zone. Miami, New York & San Francisco: Recurrent Ventures. Retrieved 29 May 2023.
7. "Fiscal Year 2011 Budget Estimate Procurement of Ammunition" (PDF). US Air Force. Archived from the original (PDF) on 20 April 2012. Retrieved 29 December 2011.
8. "Mk84 General Purpose Bomb". Federation of American Scientists. 23 April 2000. Archived from the original on 6 November 2010. Retrieved 1 September 2010.
9. Hollway, Don (March 1996). "Stealth Secrets of the F-117 Nighthawk: Its development was kept under wraps for 14 years, but by 1991, the F-117 nighthawk had become a household word". Aviation History. Harrisburg, Pennsylvania: Cowles Magazines. ISSN 1076-8858 – via HistoryNet.
10. "Mk 65 Quick Strike Mine". Federation of American Scientists. 8 December 1998. Archived from the original on 18 September 2010. Retrieved 1 September 2010.
11. "Precision Guidance Kit (HGK)". TÜBİTAK-SAGE. 2013. Archived from the original on 22 February 2016. Retrieved 28 February 2016.
12. "Aircraft History of the MK-84 Bomb". MotoArt. Archived from the original on 2 March 2016. Retrieved 15 October 2024.
13. Janačković, Branko (20 April 2024). "U toku završne pripreme za uklanjanje bombe sa gradilišta u Nišu" [In the course of final preparations for removing the bomb from the construction site in Niš]. Blic (in Serbian). Archived from the original on 22 April 2024. Retrieved 14 May 2024.
14. "Faulty, indiscriminate, lethal: Israel opts for Vietnam-era bombs in Gaza". www.middleeasteye.net. 17 August 2021. Retrieved 30 March 2024.
15. Boston, 677 Huntington Avenue; Ma 02115 (10 October 2024). "Press Release: New study shows Israel air-dropped 2000lb bombs within lethal and damage ranges of hospitals in Gaza". FXB Center for Health & Human Rights | Harvard University. Retrieved 16 November 2024.{{cite web}}: CS1 maint: numeric names: authors list (link)
16. "Yemen: US Bombs Used in Deadliest Market Strike". www.hrw.org. 7 April 2016. Retrieved 30 March 2024. Human Rights Watch conducted on-site investigations on March 28, and found remnants at the market of a GBU-31 satellite-guided bomb, which consists of a US-supplied MK-84 2,000-pound bomb mated with a JDAM satellite guidance kit, ...
17. "US has agreed to send more bombs and warplanes to Israel, sources say". www.reuters.com. 29 March 2024. Retrieved 30 March 2024. The new arms packages include more than 1,800 MK84 2,000-pound bombs and 500 MK82 500-pound bombs, said the sources, who confirmed a report in the Washington Post.
18. "Visual Evidence Shows Israel Dropped 2,000-Pound Bombs Where It Ordered Gaza's Civilians to Move for Safety". www.nytimes.com. 21 December 2023. Retrieved 30 March 2024.
19. "US has sent Israel thousands of 2,000-pound bombs since Oct. 7". Reuters. 30 June 2024. Retrieved 17 August 2024.
20. Nasrallah Assassination: US senator confirms use of American-made 900 kilo bombs html

External links

• Mk65 Quick Strike Mine, GlobalSecurity.org
• MK84, GlobalSecurity.org

• Cold War aerial bombs of the United States
• Aerial bombs of the United States
• Military equipment introduced in the 1970s