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