This image data set could be provided to one or more display units, whereby each visual aid may be presented on {HEAD ~ the screen} of {TAIL ~ each display unit} 
of
This image data set could be provided to one or more display units , whereby each visual aid may be presented on { HEAD ~ the screen } of { TAIL ~ each display unit }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL