| 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 | A | Aerodrome information | | | E | En-Route information | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 002 | 200 feet QNE | | | / | | | Centre Latitude | 5128N | 51° 28' North' | | Centre Longitude | 00029W | 0° 29' West | | Radius of area affected | 001 | 1 nautical miles |
| | CRANE OPERATING AT POSITION 512803N 0002923W ( HEATHROW ). MAXIMUM HEIGHT 49FT ABOVE GROUND LEVEL,128FT ABOVE MEAN SEA LEVEL.NO APPROACHES TO RUNWAY 09R / 27L OR DEPARTURE FROM RUNWAY 27L WILL TAKE PLACE WHEN CRANE IS OPERATING.CRANE REF 20250606103. |
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