GATOR mine system
• CBU-89/B • Primary function: — 1000 lb unpowered cluster munition weapon • Length: — 7 ft • Diameter: — 16 in • Range: — Freefall • CBU-78/B • Primary function: — 500 lb unpowered cluster munition weapon • Length: — 7 ft • Diameter: — 16 in • Weight: — 222 kg • Range: — Freefall The GATOR mine system is a United States military system of air-dropped anti-tank and anti-personnel mines developed in the 1980s to be compatible with existing cluster dispensers. It is used with two dispenser systems: the Navy 500 lb CBU-78/B and the Air Force 1000 lb CBU-89/B. Additionally the mines are used with the land- and helicopter-based Volcano mine system.
Also recorded as CBU-89
GATOR mine system
- Field
- Family of Scatterable Mines.
- Region
- United States.
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Documentary summary
• CBU-89/B • Primary function: — 1000 lb unpowered cluster munition weapon • Length: — 7 ft • Diameter: — 16 in • Range: — Freefall • CBU-78/B • Primary function: — 500 lb unpowered cluster munition weapon • Length: — 7 ft • Diameter: — 16 in • Weight: — 222 kg • Range: — Freefall The GATOR mine system is a United States military system of air-dropped anti-tank and anti-personnel mines developed in the 1980s to be compatible with existing cluster dispensers. It is used with two dispenser systems: the Navy 500 lb CBU-78/B and the Air Force 1000 lb CBU-89/B. Additionally the mines are used with the land- and helicopter-based Volcano mine system.
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original value insufficient · checked 25 September 2026
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wikidata · Q4819315 · wikipedia · GATOR mine system
In this article
Operation
Operation
In use the bombs are dropped from aircraft flying at speeds between 200 and, and at altitudes of between 100 and 1,200 meters. An FMU-140/B fuze controls the opening of the dispenser at one of 10 predetermined altitudes between 90 m and 900 m using a Doppler ranging radar or alternatively a 1.2 second time fuse. Mine arming begins when the dispenser opens with the activation of the mines' vanadium pentoxide batteries. The circular mines have a rectangular plastic "aeroballistic" adaptor. Once the mines reach the ground they become armed between 1.2 and 10 seconds. The mines self-destruct after a preset time which can be set to 4 hours, 15 hours or 15 days. Any that do not will become disabled after 40 days when the batteries discharge fully. The self-destruct time is set just prior to aircraft takeoff using a simple selector switch on the dispenser. During the Gulf War the dud rate for this system was significant; in one of seven Kuwaiti battlefield sectors there were 205 BLU-91 and 841 BLU-92 duds. Given that 89,235 BLU-91 and 27,535 BLU-92 mines were used during the Gulf War, this represents a dud rate of somewhere between 0.5 and 2% for the BLU-91 and to 6 to 21% for the BLU-92. Additionally, Conventional Munition Systems Inc. minefield clearing personnel reported dud GATOR mines detonating with no apparent triggering event, and speculated that the extreme heat of the Kuwait desert may have triggered detonation. The GATOR system provides a means to emplace minefields on the ground rapidly using high-speed tactical aircraft. A typical GATOR minefield is 650 m long and 200 m wide and contains 432 anti-tank mines and 132 anti-personnel mines. The minefields are used for area denial, diversion of moving ground forces, or to immobilize targets to supplement other direct attack weapons. In the 1991 Gulf War the US Air Force employed 1,105 CBU-89s. One reported task was to hamper the movements of Iraqi Scud missile launchers. In the context of the 2026 Iran war journalists from Bellingcat concluded that BLU-91/B anti-tank mines had probably been deployed from a GATOR mine system over the village of Kafari in Fars Province. A possible motivation for this is the village's location close to Shiraz South Missile Base. The mines could destroy or disable the ballistic missile launchers and deny the roads around the bases to launcher vehicles.
Air Force CBU-89/B
Air Force CBU-89/B
The Air Force CBU-89/B is a 1000 lb cluster munition containing 72 antitank and 22 antipersonnel mines, consists of an SUU-64 Tactical Munitions Dispenser with an optional FZU-39 proximity sensor. The TMD is the same general configuration used for the CBU-87/B Combined Effects Munition. This commonality allows for high-rate, low-cost production of the dispenser. When the CBU-89 is used in conjunction with the Wind Corrected Munitions Dispenser guidance tail kit, it became a precision-guided munition designated as CBU-104.
Navy CBU-78/B
BLU-91/B anti-tank mine
BLU-91/B anti-tank mine
The BLU-91 /B AT mine is a low flat cylinder with a rectangular aeroballistic shell. A magnetic sensor in the mine detects potential targets. When a suitable target reaches the most vulnerable approach point it detonates the mine. The mine is also triggered if the mine is moved, or if the battery reaches a certain low voltage point. Once the fuse is triggered, a small clearing charge is fired that clears any debris that may be on top of the mine. A second larger charge is triggered 30 ms later, creating an Explosively Formed Penetrator capable of penetrating 70 mm of armour, using the Misznay-Schardin effect. The charge is capable of penetrating most armoured vehicles from below. The mine weighs 1.95 kilograms and is 127 millimeters in diameter, with 580 grams of an RDX/Estane explosive mix.
BLU-92/B anti-personnel mine
BLU-92/B anti-personnel mine
After the mine reaches the ground, and the arming delay has passed, a squib is fired launching eight tripwires from the mine. Tension on any of the wires triggers the mine electronically; it also has an anti-handling "ball and can" switch. The mine has an effective fragmentation radius of about 20 meters. The mine is approximately 127 millimeters in diameter and weighs 1.68 kilograms. The mine's main charge consists of 420 grams of Composition B-4.
Primary material
Documents and archives
authority record
- Wikidata, structured authority record Q4819315: GATOR mine system
Unverified · Wikidata
reference work
- “GATOR mine system”, English Wikipedia, consulted as further reading
Reputable secondary · Wikipedia
Notes from the source article
Cited by Wikipedia
Notes from the source article
These works are cited by the source article, in its own numbering. They are recorded as its citations, not as sources VALÉORINE has verified.
- 1.Government Accountability Office report: Information on U.S. Use of Land Mines in the Persian Gulf War
- 2.Ball, Trevor. Evidence Points to US Scattering Mines over Iranian Village. Bellingcat. 26 March 2026.
- 3.Is The U.S. Dropping Mines To Stop Iranian Missile Launchers?. The War Zone. 26 March 2026.
- 4.Lockheed Martin WCMD (Wind Corrected Munitions Dispenser)
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The Encyclopedia exists whether or not anything is for sale. Corrections are recorded rather than overwritten, and every version of this record is kept. Published 14 August 2026.
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