0 0 RESERVED
1 1 EYE VISIBLE ON RADAR SCOPE, ACCURACY GOOD (WITHIN 10 KM)
2 2 EYE VISIBLE ON RADAR SCOPE, ACCURACY FAIR (WITHIN 30 KM)
3 3 EYE VISIBLE ON RADAR SCOPE, ACCURACY POOR (WITHIN 50 KM)
4 4 POSITION OF THE CENTRE WITHIN THE AREA COVERED BY THE RADARSCOPE, DETERMINATION BY MEANS OF THE SPIRAL-BAND OVERLAY, ACCURACY GOOD (WITHIN 10 KM
5 5 POSITION OF THE CENTRE WITHIN THE AREA COVERED BY THE RADARSCOPE, DETERMINATION BY MEANS OF THE SPIRAL-BAND OVERLAY, ACCURACY FAIR (WITHIN 30 KM
6 6 POSITION OF THE CENTRE WITHIN THE AREA COVERED BY THE RADARSCOPE, DETERMINATION BY MEANS OF THE SPIRAL-BAND OVERLAY, ACCURACY POOR (WITHIN 50 KM
7 7 POSITION OF THE CENTRE OUTSIDE THE AREA COVERED BY THE RADAR SCOPE, EXTRAPOLATION BY MEANS OF THE SPIRAL-BAND OVERLAY
10 10 ACCURACY UNDETERMINED
15 15 MISSING VALUE
