The improvement comprises means for locating a target with respect to the generation subsystem and {HEAD ~ means} for locating {TAIL ~ an aiming point} in the image display subsystem with respect to the image generation subsystem 
for locating
The improvement comprises means for locating a target with respect to the generation subsystem and { HEAD ~ means } for locating { TAIL ~ an aiming point } in the image display subsystem with respect to the image generation subsystem
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH