| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | ST | Aerodrome control tower (TWR) | | | 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 | 5320N | 53° 20' North' | | Centre Longitude | 00251W | 2° 51' West | | Radius of area affected | 005 | 5 nautical miles |
| | AIR TRAFFIC CONTROL WILL CONDUCT A DUPLEX COMMS TRIAL.AIRCREW SHOULD BE ADVISED THAT RADIO TRANSMISSIONS MADE BY GROUND UNITS WILL BE HEARD ON BOTH TOWER FREQUENCY 126.355MHZ AND GROUND FREQUENCY 121.955MHZ.DURING RITT OPERATIONS VEHICLE TRANSMISSIONS WILL ALSO BE HEARD ON THE APPROACH FREQUENCY 119.855MHZ.FOR ANY FURTHER INFORMATION PLEASE CONTACT AIR TRAFFIC CONTROL ON 01519 071541 |
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