Significance | Code | Meaning |
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FIR | EGTT | London FIR | | / | | Qualifiers | Q | | | OL | Obstacle lights | | AS | unserviceable | | / | | Traffic | I | IFR traffic affected | | V | VFR traffic affected | | / | | Purpose | M | Miscellaneous | | / | | Scope | A | Aerodrome information | | E | En-Route information | | / | | From flight level | 000 | Surface | | / | | Up to flight level | 007 | 700 feet QNE | | / | | Centre Latitude | 5108N | 51° 8' North' | Centre Longitude | 00132W | 1° 32' West | Radius of area affected | 001 | 1 nautical miles |
| REPORT OF AIR NAV OBSTACLE LGTS UNSERVICEABLE AT POSITION : 510815N 0013218W ( DANEBURY HILL FORT ), HEIGHT 100FT ABOVE GROUND LEVEL / 665FT ABOVE MEAN SEA LEVEL |
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