Finally, comparison means are provided to compare {HEAD ~ the locations} of {TAIL ~ the target} and aiming point 
of
Finally , comparison means are provided to compare { HEAD ~ the locations } of { TAIL ~ the target } and aiming point
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH