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 {TAIL ~ the second wireless communications device} in response to receiving {HEAD ~ the indication} 
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 { TAIL ~ the second wireless communications device } in response to receiving { HEAD ~ 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 TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD