| Significance | Code | Meaning |
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| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | PO | Obstacle clearance altitude | | | CH | changed | | | / | | | Traffic | I | IFR traffic affected | | | / | | | Purpose | N | For immediate attention of aircraft operators | | | 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 | 5150N | 51° 50' North' | | Centre Longitude | 00119W | 1° 19' West | | Radius of area affected | 005 | 5 nautical miles |
| | INSTRUMENT APPROACH CHART NON-DIRECTIONAL BEACON ( L ) RUNWAY 19 ( CATEGORY A,B,C )-INCREASE PROCEDURE OBSTACLE CLEARANCE ALTITUDE ( OBSTACLE CLEARANCE HEIGHT ) FOR CATEGORY A TO C.CATEGORY A 750 ( 492 ) CATEGORY B 750 ( 492 ) CATEGORY C 750 ( 492 ) THE SDF AT D2 NO LONGER APPLIES AND SHOULD BE REMOVED.THE MOCA ( H ) BETWEEN D4.7 AND D2 SHOULD BE REMOVED.UK AERONAUTICAL INFORMATION PUBLICATION AERODROME 2.EGTK-8-4 REFERS. |
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