A device to compensate for distortion in {TAIL ~ target location} in a visual system 5 wherein said binary digital comparator means is adapted to compare {HEAD ~ target raster time} with aiming point time, so that said one signal indicates that there is a coincidence between said first and said second signals 
A device to compensate for distortion in { TAIL ~ target location } in a visual system 5 wherein said binary digital comparator means is adapted to compare { HEAD ~ target raster time } with aiming point time , so that said one signal indicates that there is a coincidence between said first and said second signals
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH