In {TAIL ~ one embodiment}, reference data could be provided by {HEAD ~ the taxi navigation database} 142 
In { TAIL ~ one embodiment } , reference data could be provided by { HEAD ~ the taxi navigation database } 142
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH