The operator then selects {HEAD ~ a plurality} of {TAIL ~ vertically spaced measuring points} along the front and side outline maps 
The operator then selects { HEAD ~ a plurality } of { TAIL ~ vertically spaced measuring points } along the front and side outline maps
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH