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