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