| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | ND | Distance measuring equipment (DME) | | | XX | miscellaneous plain language | | | / | | | 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 | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 999 | Unlimited | | | / | | | Centre Latitude | 5311N | 53° 11' North' | | Centre Longitude | 00259W | 2° 59' West | | Radius of area affected | 025 | 25 nautical miles |
| | RADIO NAVIGATION AND LANDING AIDS-AMEND DISTANCE MEASURING EQUIPMENT I-HWD AND I-HDN FREQUENCY PAIRING AS FOLLOWS : DISTANCE MEASURING EQUIPMENT I-HWD-FREQUENCY PAIRED WITH ILS I-HWD.ZERO RANGE TO THRESHOLD OF RUNWAY 04.DISTANCE MEASURING EQUIPMENT I-HDN-FREQUENCY PAIRED WITH ILS I-HDN.ZERO RANGE TO THRESHOLD OF RUNWAY 22.UK AERONAUTICAL INFORMATION PUBLICATION EGNR AERODROME 2.19 AND DIGITAL DATASET REFERS. |
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