| Significance | Code | Meaning |
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| FIR | EGXX | UK Open FIR | | | / | | | Qualifiers | Q | | | | AF | Flight information region (FIR) | | | XX | miscellaneous plain language | | | / | | | Traffic | I | IFR traffic affected | | | V | VFR traffic affected | | | / | | | Purpose | N | For immediate attention of aircraft operators | | | 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 | 999 | Unlimited | | | / | | | Centre Latitude | 5504N | 55° 4' North' | | Centre Longitude | 00500W | 5° 0' West | | Radius of area affected | 999 | 999 nautical miles |
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