| 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 | 5352N | 53° 52' North' | | Centre Longitude | 00140W | 1° 40' West | | Radius of area affected | 005 | 5 nautical miles |
| | OBSTACLE CLEARANCE ALTITUDE / OBSTACLE CLEARANCE HEIGHT AMENDED FOR IAC ILS / DISTANCE MEASURING EQUIPMENT / NON-DIRECTIONAL BEACON ( L ) RUNWAY 32 II DUE CRANE ACTIVITY CATEGORY A 782 ( 120 ), CATEGORY B 798 ( 136 ), CATEGORY C 812 ( 150 ), CATEGORY D 822 ( 160 ) |
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