{TAIL ~ The reference map transformation values} are used in {HEAD ~ conjunction} with a terrain correlation process to establish vehicle position 
{ TAIL ~ The reference map transformation values } are used in { HEAD ~ conjunction } with a terrain correlation process to establish vehicle position
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH