{HEAD ~ A sequencer} 12 mechanically supports the parabolic reflector 2 and is capable of turning {TAIL ~ the reflector} about a vertical axis so that its beam can rotate to any direction in a horizontal plane through the sequencer 
{ HEAD ~ A sequencer } 12 mechanically supports the parabolic reflector 2 and is capable of turning { TAIL ~ the reflector } about a vertical axis so that its beam can rotate to any direction in a horizontal plane through the sequencer
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH