 Complete the following phrase:  The missile was brought into service with 12 Regiment Royal Artillery and 47 Regiment Royal Artillery in 1997 as part of the High Velocity Missile HVM system equipped with both the Air Defence Acquisition Device ADAD and a ×60 thermal sight. Each Regiment was equipped with 108 HVM Self propelled armoured launchers mounted on the Stormer tracked chassis capable of holding 8 missiles ready to fire and a further 8 reloads originally 12 but some capacity was removed during a later modification. This made them the largest armoured regiments in the British Army at the time. The launchers could originally run on batteries for extended periods to minimise their signature but significant upgrades have dramatically increased the systems power requirements. A light role variant known as HVM Lightweight Multi Launch LML, capable of holding three ready to fire missiles was also brought into service with the Air Defence Troop Royal Marines and a Royal Artillery Air Assault Battery attached to 16 Air Assault Brigade. The systems armoured variant HVM Self Propelled Stormer saw service during the 