| Significance | Code | Meaning |
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| 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 | 5016N | 50° 16' North' | | Centre Longitude | 00516W | 5° 16' West | | Radius of area affected | 003 | 3 nautical miles |
| | GROUND TRANSPONDER TESTING.MODE S TEST TRANSPONDER LOCATED AT : 501620N 0051534W ( MOUNT HAWKE ). POSSIBLE FALSE AIRCRAFT INDICATIONS MAY OCCUR WITHIN 2NM RADIUS.MAXIMUM HEIGHT 99000FT ABOVE GROUND LEVEL.MAY INDICATE A SPEED OF 300KTS.DIRECT OVERFLIGHT BELOW 100FT SHOULD BE AVOIDED.FOR INFO 07766 755715.AR-2026-7357 / 01. |
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