| 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 | E | En-Route information | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 025 | 2500 feet QNE | | | / | | | Centre Latitude | 5338N | 53° 38' North' | | Centre Longitude | 00231W | 2° 31' West | | Radius of area affected | 001 | 1 nautical miles |
| | AIR NAV OBSTACLE LIGHT UK0171A245F RTM RTM WINTER HILL MAST SINGLE UNSERVICEABLE POSITION 533732.09N 0023053.31W,ELEV / HEIGHT 2452 FT,1015 FT |
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