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