| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | XX | Miscellaneous | | | LW | will take place | | | / | | | Traffic | I | IFR traffic affected | | | V | VFR traffic affected | | | / | | | Purpose | B | For inclusion in Preflight Infomation Bulletins | | | O | Operationally significant for IFR flights | | | / | | | Scope | W | Navigational Warning | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 999 | Unlimited | | | / | | | Centre Latitude | 5411N | 54° 11' North' | | Centre Longitude | 00025W | 0° 25' West | | Radius of area affected | 003 | 3 nautical miles |
| | GROUND TRANSPONDER TESTING.MODE S TEST TRANSPONDER LOCATED AT : 541129N 0002431W ( 0.5NM SOUTH OF FLIXTON ). POSSIBLE FALSE AIRCRAFT INDICATIONS MAY OCCUR WITHIN 2NM RADIUS.MAXIMUM HEIGHT FL990.FOR INFO 07825 342770.AR-2025-1719 / 01. |
|
