adjusting {HEAD ~ the flight path} between the initial point and {TAIL ~ the destination point} to pass through the new intermediate point, thereby providing a modified flight path; and 
adjusting { HEAD ~ the flight path } between the initial point and { TAIL ~ the destination point } to pass through the new intermediate point , thereby providing a modified flight path ; and
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH