 The entire system was mounted at the back of the XM546 "Tracked Fire Unit" on a rotating platform that allowed the missiles to be pointed toward the target.Before launch the protective cover over the missile's canister was popped off to allow the infrared seeker to see the target, and then it was launched into the illuminating radar's beam.Raytheon provided both the search and illumination radars, while Burroughs provided the fire control system.