| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | NX | Direction finding station | | | AS | unserviceable | | | / | | | Traffic | V | VFR traffic affected | | | / | | | Purpose | B | For inclusion in Preflight Infomation Bulletins | | | O | Operationally significant for IFR flights | | | / | | | Scope | A | Aerodrome information | | | E | En-Route information | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 999 | Unlimited | | | / | | | Centre Latitude | 5109N | 51° 9' North' | | Centre Longitude | 00145W | 1° 45' West | | Radius of area affected | 025 | 25 nautical miles |
| | BOSCOMBE DOWN HIGH RESOLUTION DIRECTION FINDER UNSERVICEABLE |
|
