The apparatus compensates for equipment errors that prevent a marksmanship device from providing {HEAD ~ an accurate indication} of a firearm hit or {TAIL ~ miss} 
The apparatus compensates for equipment errors that prevent a marksmanship device from providing { HEAD ~ an accurate indication } of a firearm hit or { TAIL ~ miss }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL