FIG 5 illustrates {HEAD ~ a block diagrammatic view} of {TAIL ~ a navigation system} employing terrain correlation system of this invention 
of
FIG 5 illustrates { HEAD ~ a block diagrammatic view } of { TAIL ~ a navigation system } employing terrain correlation system of this invention
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH