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