Beyond-visual-range missile

A beyond-visual-range missile (BVR missile) or beyond-visual-range air-to-air missile (BVRAAM) is an air-to-air missile with a weapon engagement zone (WEZ) that exceeds the visual field of the pilot. Medium-range, long-range, and very-long-range air-to-air missiles fall under the category of beyond-visual-range missiles. When being operated in BVR capacity, the pilot must rely on the aircraft's radar systems to detect, identify, acquire, and track the target, since the pilot cannot resolve the target visually. BVR range typically begins at around 40 km (22 nmi) and beyond. BVR missiles are capable of reaching their targets using dual pulse rocket motors or a booster rocket motor and ramjet sustainer motor. In addition to the range capability, the missile must also be capable of tracking its target at this range or acquiring the target in flight. Older BVR missiles generally used semi-active radar homing, while modern BVR missiles use active radar homing guidance. Systems in which a mid-course correction is transmitted to the missile have also been used.