| Significance | Code | Meaning |
|---|
| 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 | 5334N | 53° 34' North' | | Centre Longitude | 00021W | 0° 21' West | | Radius of area affected | 005 | 5 nautical miles |
| | INSTRUMENT APPROACH CHART-ILS / DISTANCE MEASURING EQUIPMENT / NON-DIRECTIONAL BEACON ( L ) RUNWAY 20 AMEND OBSTACLE CLEARANCE ALTITUDE ( OBSTACLE CLEARANCE HEIGHT ) CATEGORY I TO READ : CATEGORY A 224 ( 150 ) CATEGORY B 234 ( 160 ) CATEGORY C 245 ( 171 ) CATEGORY D 258 ( 184 ) AMEND VM ( C ) OBSTACLE CLEARANCE ALTITUDE ( OBSTACLE CLEARANCE HEIGHT ABOVE AERODROME LEVEL ) TOTAL AREA TO READ : CATEGORY A / B 690 ( 569 ) UK AERONAUTICAL INFORMATION PUBLICATION AERODROME 2.EGNJ-8-4 REFERS. |
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