| Significance | Code | Meaning |
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| 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 | 004 | 400 feet QNE | | | / | | | Centre Latitude | 5131N | 51° 31' North' | | Centre Longitude | 00024W | 0° 24' West | | Radius of area affected | 001 | 1 nautical miles |
| | LONDON HEATHROW AERODROME OBSTACLES-NEW CRANE ADDED IN CIRCLING AREA AND AT AERODROME TYPE : CRANE ID : 20260106192 POSITION : 513036N 0002340W ELEVATION : 230FT ABOVE GROUND LEVEL / 330FT ABOVE MEAN SEA LEVEL LIGHTING : RED REMARKS : BROOK INDUSTRIAL ESTATE,BEACONSFIELD RD,HAYES UB4 0JZ.CRANE WILL NOT OPERATE IN LOW VIS SAFEGUARDING / LVP.CRANE WILL OPERATE WITHIN THE AREA BOUNDED BY THE FOLLOWING COORDINATES : 513033N 0002344W-513033N 0002337W-513037N 0002335W-513038N 0002342W.UK AERONAUTICAL INFORMATION PUBLICATION EGLL AERODROME 2.10 REFERS .) |
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