There is no need for a complex computer control system since {HEAD ~ the Z axis displacement} is substantially independent of horizontal movement over a coverage area serviced by {TAIL ~ the platform} 
There is no need for a complex computer control system since { HEAD ~ the Z axis displacement } is substantially independent of horizontal movement over a coverage area serviced by { TAIL ~ the platform }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL