Starstreak is a British short range surface-to-air missile manufactured by Thales Air Defence Limited (originally Shorts Missile Systems), in Belfast. It is also known as Starstreak HVM where HVM stands for \"High Velocity Missile\". After launch the missile accelerates to approximately Mach 3.5, at which point it launches three laser beam riding submunitions. The use of three submunitions increases the likelihood of a successful hit on the target. Starstreak has been in service with the British Army since 1997. Development on the missile began in 1984 after a study into a weapon system to supplement the Rapier missile system showed that a high velocity missile system was the best solution to the problem. A General Staff Requirement was drawn up with the requirements of the system, specifying the requirement of 3 launch platforms for the missile: A self-propelled launcher; A three round light weight launcher; A man portable launcher. Further development and a production contract materialized in November 1986, and the missile was officially accepted into service in September 1997. The missile is intended to replace the Javelin surface-to-air missile in British service.The Starstreak missile is transported in a sealed launch tube. This tube is attached to an aiming unit for firing. The operator tracks the target using the aiming units\' optically stabilized sight. The process of tracking the target allowing the aiming unit to compute the right trajectory to bring the missile together with the target. The operator can indicate wind direction to the unit, and in the case of a long range target provide super elevation. When the initial tracking is complete, the operator fires the missile by pressing a button.