defining waypoints for segments of a path and sending the path data in {HEAD ~ segments} to {TAIL ~ the second wireless communications device}; and 
to
defining waypoints for segments of a path and sending the path data in { HEAD ~ segments } to { TAIL ~ the second wireless communications device } ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH