Significance | Code | Meaning |
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FIR | EGTT | London FIR | | / | | Qualifiers | Q | | | NN | TACAN | | 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 | A | Aerodrome information | | E | En-Route information | | / | | From flight level | 000 | Surface | | / | | Up to flight level | 999 | Unlimited | | / | | Centre Latitude | 5109N | 51° 9' North' | Centre Longitude | 00145W | 1° 45' West | Radius of area affected | 025 | 25 nautical miles |
| TACAN BDN / BOSCOMBE DOWN FREQUENCY 108.2MHZ CH19X UNSERVICEABLE DUE MAINTENANCE |
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