| Significance | Code | Meaning |
|---|
| 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 | 009 | 900 feet QNE | | | / | | | Centre Latitude | 5008N | 50° 8' North' | | Centre Longitude | 00540W | 5° 40' West | | Radius of area affected | 001 | 1 nautical miles |
| | MAST OBSTACLE LIGHT EGHC1305 ( ST JUST ) UNSERVICEABLE.POSITION 500826.25N 0053951.91W,ELEV 834FT / HEIGHT 179FT |
|
