Air Chief Marshal Sir Stephen Dalton has said that 98.3% to 98.7% of Brimstone fired in Libya "did exactly what we expected". Targeting and sensors Brimstone is a "fire-and-forget" missile, which is loaded with targeting data by the weapon systems officer (WSO) prior to launch. It is programmable to adapt to particular mission requirements. This capability includes the ability to find targets within a certain area (such as those near friendly forces), and to self-destruct if it is unable to find a target within the designated area. In addition to the semi-autonomous ability to decide its own targets, the Brimstone has the capacity to determine where on a target to best impact causing the most damage. The missile's advanced sensor package includes its extremely high frequency millimetric wave radar, which allows the weapon to image the target and hence choose a target location. With as many as twenty-four missiles in the air, the missile's targeting system also required an algorithm to ensure that missiles hit their targets in a staggered order, rather than all simultaneously. Brimstone can be fired in a number of attack profiles; direct or indirect against single targets, a column of targets or against an array of targets. The latter utilises a salvo attack capability for multiple kills per engagement. Once launched, the platform is free to manoeuvre away from the target area or engage other targets. Launch system Each launch system carries three missiles on rails. This allows a single aircraft to carry large numbers of missiles; for example, a Typhoon fighter could carry up to six launch systems, which gives a maximum payload of eighteen Brimstone missiles, in addition to a useful air-to-air payload. The missile was carried by the Tornado GR4 aircraft in RAF service. In February 2014 the National Audit Office warned of a possible capability gap under existing plans to fit Brimstone to Typhoon in 2021, two years after the Tornado retired; in June 2014 the MoD announced a study to accelerate this to 2018 and look at a common launcher that could also launch SPEAR Cap 3. MBDA has fired test rounds from an MQ-9 Reaper drone and is studying the use of Brimstone on attack helicopters and from surface launchers. It was intended that Brimstone would be integrated on the RAF Harrier aircraft fleet under Capability D of the JUMP programme with a scheduled in-service date of 2009. A Harrier