| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | CA | Air/ground | | | AS | unserviceable | | | / | | | Traffic | I | IFR traffic affected | | | V | VFR traffic affected | | | / | | | Purpose | B | For inclusion in Preflight Infomation Bulletins | | | O | Operationally significant for IFR flights | | | / | | | Scope | E | En-Route information | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 195 | 19500 feet QNE | | | / | | | Centre Latitude | 5208N | 52° 8' North' | | Centre Longitude | 00006E | 0° 6' East | | Radius of area affected | 128 | 128 nautical miles |
| | LONDON FIS EAST FREQUENCY 124.600MHZ ( AREA J ) NOT AVAILABLE DUE MAINTENANCE.PILOTS ARE ADVISED OF POSS COM DIFFICULTIES AND SHOULD CONSIDER AN ALTN SERVICE IF REQUIRED |
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