receiving an indication from the second wireless communications device that the second wireless communications device has reached a waypoint and sending the path data for a successive segment to the second wireless communications device in {HEAD ~ response} to receiving {TAIL ~ the indication} 
to receiving
receiving an indication from the second wireless communications device that the second wireless communications device has reached a waypoint and sending the path data for a successive segment to the second wireless communications device in { HEAD ~ response } to receiving { TAIL ~ the indication }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL