JP233

The JP233, originally designated as the Low-Altitude Airfield Attack System (LAAAS), was developed beginning in 1977 as a cooperative program between the United Kingdom and the United States Air Force. The United States withdrew from the program in 1982 due to rising costs, after which the United Kingdom completed development independently for integration on the Panavia Tornado, SEPECAT Jaguar, and Hawker Siddeley Harrier.

The system consists of aircraft-mounted dispenser pods carrying parachute-retarded submunitions designed for airfield denial. Unlike conventional free-fall bombs, the dispenser pods remain attached to the aircraft during the dispensing sequence and are jettisoned once empty. The system deploys two distinct submunition types: SG-357 runway cratering munitions and HB-876 anti-personnel mines.

The SG-357 is a two-stage munition utilizing a telescopic stand-off fuse. Upon impact, a rear-mounted shaped charge detonates to penetrate the concrete runway surface, creating a channel. A forward high-explosive cylindrical charge then enters this channel and detonates beneath the runway surface, creating a crater with raised edges to complicate repairs.

The HB-876 mine is designed to delay runway repair operations. Upon landing, spring steel legs deploy to orient the mine vertically. It utilizes a self-forging fragment warhead and a dimpled steel casing that disperses anti-personnel fragments radially. The mines detonate at preset intervals, when disturbed, or when tilted by clearing vehicles.

The JP233 was operated by the United Kingdom and Saudi Arabia. Operation required the aircraft to execute low, straight, and level flight directly over the target runway. The system was deployed in combat during the Gulf War. During these operations, aircrews noted that the detonation of the dispensed munitions illuminated the attacking aircraft at night. JP233 missions were suspended during the conflict after the Iraqi Air Force ceased flight operations. One Tornado aircraft was lost during a JP233 mission, crashing after weapon delivery in an incident attributed to controlled flight into terrain. The United Kingdom withdrew the JP233 from service in 1998 following the adoption of standoff land-attack munitions and the UK's accession to the Land Mines Treaty, which outlawed the HB-876 submunition.