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