| 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 | 011 | 1100 feet QNE | | | / | | | Centre Latitude | 5041N | 50° 41' North' | | Centre Longitude | 00122W | 1° 22' West | | Radius of area affected | 001 | 1 nautical miles |
| | AIR NAV OBSTACLE LIGHT UK0230N156F RTM RTM ROWRIDGE MAST SINGLE UNSERVICEABLE POSITION = 504036.28N,0012213.28W,ELEV / HEIGHT = 1080 FT,614 FT |
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