| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | OB | Obstacle | | | CE | erected | | | / | | | Traffic | I | IFR traffic affected | | | V | VFR traffic affected | | | / | | | Purpose | M | Miscellaneous | | | / | | | Scope | E | En-Route information | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 005 | 500 feet QNE | | | / | | | Centre Latitude | 5119N | 51° 19' North' | | Centre Longitude | 00159W | 1° 59' West | | Radius of area affected | 001 | 1 nautical miles |
| | UNLIT MAST POSITION 511909N 0015914W ( POTTERNE,WILTSHIRE ) IN LOW FLYING AREA 1A AND NIGHT ROTARY REGION 1.HEIGHT 120FT ABOVE GROUND LEVEL 420FT ABOVE MEAN SEA LEVEL.26 / 09 / 206 / LFC |
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