I don't think so, but Fire Controls can't spot anything, right? So basically, if I want to cover all angles, I need 4 sensors (at least): a fire control against missiles, a fire control against bigger ships, and the same to spot the objects, so a sensor against missile and a sensor against ships (and this is the minimum, you might need a sensor against fighters, then against 3000 tons objects and a third one against anything bigger?)