{HEAD ~ The sequencer} is also capable of rotating the beam up and down in {TAIL ~ a vertical plane} 
{ HEAD ~ The sequencer } is also capable of rotating the beam up and down in { TAIL ~ a vertical plane }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL