VERTICAL AND HORIZONTAL RETICLE CROSS HAIR PATTERNS TO BE PARALLEL TO THEIR RESPECTIVE MECHANICAL AXES SO THAT A SCOPE SWEEP ON A SINGLE POINT IS WITHIN TWO (2) ARC SECONDS AS VIEWED THROUGH THE SCOPE.
AIA/NAS NAS 179-1978 history
1978AIA/NAS NAS 179-1978 Collar Hi-Shear Rivet Superseded - March 1978 (Rev. 4) [Use: AIA/NAS NAS 528]
AIA/NAS NAS 179-1978 Collar Hi-Shear Rivet Superseded - March 1978 (Rev. 4) [Use: AIA/NAS NAS 528] was changed to AIA/NAS NAS 528-1983 Collar (High Strength) High -- Shear Rivet (Rev. 6).