| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | OB | Obstacle | | | CE | erected | | | / | | | Traffic | I | IFR traffic affected | | | V | VFR traffic affected | | | / | | | Purpose | M | Miscellaneous | | | / | | | Scope | E | En-Route information | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 006 | 600 feet QNE | | | / | | | Centre Latitude | 5148N | 51° 48' North' | | Centre Longitude | 00012W | 0° 12' West | | Radius of area affected | 001 | 1 nautical miles |
| | LIT CRANE OPERATING POSITION 514801N 0001131W ( WELWYN GARDEN CITY,HERTFORDSHIRE ) IN THAMES VALLEY AVOIDANCE AREA.HEIGHT 562FT ABOVE MEAN SEA LEVEL / 285FT ABOVE GROUND LEVEL.24 / 04 / 065 / LFC |
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