a Global Satellite Navigation System receiver for receiving GNSS signals and for generating {HEAD ~ current position data} representing {TAIL ~ a current position} of the first wireless communications device 
a Global Satellite Navigation System receiver for receiving GNSS signals and for generating { HEAD ~ current position data } representing { TAIL ~ a current position } of the first wireless communications device
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH