JP233
| Company type | Military weapon system |
|---|---|
| Industry | Defense |
| Predecessor | Low-Altitude Airfield Attack System (LAAAS) |
| Founded | 1977 |
| Products | Submunition deployment pods (SG-357 submunitions, HB-876 anti-personnel mines) |
| Parent | Hunting Engineering (currently INSYS) |
The JP233, initially known as the Low-Altitude Airfield Attack System (LAAAS), is a British submunition deployment mechanism consisting of sizable dispenser pods loaded with hundreds of submunitions specifically engineered to incapacitate runways.
Design and development
The project commenced in 1977 as a collaborative effort equally funded by Hunting Engineering (currently INSYS) and the United States Air Force. The USAF intended to equip the system on the FB-111 aircraft but withdrew in 1982 due to escalating expenses. Subsequently, the United Kingdom finalized development independently to integrate the system with the Panavia Tornado, SEPECAT Jaguar, and Hawker Siddeley Harrier platforms.
The dispenser pods were designed for attachment on wing pylons, featuring either short-finned containers for bomblets or medium-finned containers for mine deployment. Whereas the F-111 could carry two pairs of each pod type, the Jaguar and Harrier were limited to a single pair of one type. The Tornado was equipped with larger shoulder-mounted pods capable of housing both munition varieties simultaneously. Each Tornado pod contained 30 SG-357 submunitions for runway cratering positioned at the rear and 215 HB-876 anti-personnel mines at the front, both slowed by small parachutes during descent.
The SG-357, weighing 26 kg, operates as a dual-stage device: it features a forward high-explosive charge with a central cavity and a rear shaped charge activated via a telescopic fuse designed to penetrate reinforced concrete runways. Upon impact, the shaped charge forms an underground void followed by detonation of the main charge beneath the surface, generating substantial crater "heave" that significantly hinders repair efforts.
Surface-deployed HB-876 mines obstruct swift runway restoration. These mines are equipped with spring steel "coronets" that erect vertically after release, orienting their self-forging fragment warheads upwards. Their dimpled steel casings disperse lethal fragments in all directions upon detonation, triggered either by preset timers or physical disturbance. Positioned above ground level, they are activated when engaged by bulldozer blades, directing fragments toward the advancing vehicle.
Unlike conventional free-falling submunition systems, JP233 dispenser pods remain affixed to the aircraft throughout deployment and are jettisoned only once completely emptied.
Deployment
Operational use required aircraft to maintain low-altitude, straight, and level flight over hostile airfields while dispensing the pod payload across runways. During the Gulf War, there were claims that Tornado aircraft were downed by anti-aircraft guns and MANPADS while deploying JP233 munitions. However, none of these losses occurred during the actual attack phase of JP233 missions. Only one Tornado, ZA392, was lost carrying JP233; it crashed shortly after completing its delivery run without evidence of enemy fire involvement and was attributed to a probable controlled flight into terrain accident.
Both British and Saudi Arabian aircrews expressed concern over their aircraft being brightly illuminated at night due to exploding submunitions. Consequently, JP233 operations were halted six days into the Gulf War after the Iraqi Air Force ceased conducting missions.
With advancements in standoff munitions offering comparable effects but with reduced risk to aircrews and aircraft—and following the UK's ratification of the Land Mines Treaty, which prohibited HB-876 mines—the JP233 system was retired from service in 1998. Additionally, it would have been banned under the provisions of the Convention on Cluster Munitions.
Specimens of JP233 are preserved in multiple museums. The Imperial War Museum holds physical examples alongside test footage accessible online. The Cold War Gallery at the National Museum of the US Air Force displays a JP233 mounted on a Panavia Tornado GR1 airframe.