Weighting factors used in revised Model 2 (NAT SPG/27, paragraph 1.2.2.4) ERROR WEIGHTINGS Type of Error Deviation NM Waypoint insertion orb bATC System Loop Equipment failure Non-approved user (short range nav) 1° (50-70) 0.33 0.40 0.40 2° (71-130) 0.58 0.55 0.58 3° (131-190) 0.84 0.70 0.84 4° (191-250) 1.09 0.85 1.09 5° (251-310) 1.34 1.00 1.34 6° (311-370) 1.59 1.15 1.59 Waypoint insertion errors of 1°, which, because of the track geometry, result in across track error of less than 50 NM, will also be afforded the appropriate weighting. Waypoint insertion errors will be afforded weightings appropriate to the 'equivalent' magnitude of the error (equivalent magnitude is the magnitude which scrutiny establishes that the error would have reached, had not the presence of radar enabled the error to be truncated.
