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