| Significance | Code | Meaning |
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| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | FA | Aerodrome | | | 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 | A | Aerodrome information | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 999 | Unlimited | | | / | | | Centre Latitude | 5129N | 51° 29' North' | | Centre Longitude | 00028W | 0° 28' West | | Radius of area affected | 005 | 5 nautical miles |
| | EGLL WILL OPERATIONALISE AN AUTOMATIC DATA EXCHANGE WITH NETWORK OPERATIONS TO BECOME AN ANI ( ADVANCED NETWORK INTEGRATED ) AIRPORT,IN ADDITION TO THE EXISTING ACDM ( AIRPORT COLLABORATIVE DECISION MAKING ) MESSAGE EXCHANGE.AN ANI AIRPORT HAS FULLY ADOPTED THE AIRPORT-CDM CONCEPT BY PROVIDING THE FULL SET OF DPI MESSAGES ( DEPARTURE PLANNING INFORMATION P-DPI,E-DPI,T-DPI-T,T-DPI-S,A-DPI AND C-DPI ) AND ALSO PROVIDES G-API MESSAGES ( GENERAL ARRIVAL PLANNING INFORMATION ) TO NETWORK MANAGEMENT OPERATIONS CENTRE ( NMOC ). WITH THE INTRODUCTION OF P-DPI AND G-API MESSAGE EXCHANGE WITH NM SYSTEMS,THE ATFM NETWORK MAY BE IMPACTED AS EARLY AS 48HR BEFORE EOBT.AIRCRAFT OPERATORS AND GROUND HANDLERS ARE REMINDED TO KEEP TARGET OFF BLOCK TIME ( TOBT ) AND EOBT UP TO DATE IN LINE WITH A-CDM PRINCIPLES.QUESTIONS MAY BE DIRECTED TO AOP ( AT ) HEATHROW.COM |
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