| Significance | Code | Meaning |
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| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | OB | Obstacle | | | CE | erected | | | / | | | Traffic | I | IFR traffic affected | | | V | VFR traffic affected | | | / | | | Purpose | M | Miscellaneous | | | / | | | Scope | A | Aerodrome information | | | E | En-Route information | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 004 | 400 feet QNE | | | / | | | Centre Latitude | 5055N | 50° 55' North' | | Centre Longitude | 00124W | 1° 24' West | | Radius of area affected | 001 | 1 nautical miles |
| | AERONAUTICAL INFORMATION PUBLICATION SUPPLEMENT 041 / 2026-CRANE OPERATING POSITION 505513N 0012424W ( SOUTHAMPTON AERODROME VICINITY OF )-AMEND MAXIMUM HEIGHT TO 245FT ABOVE GROUND LEVEL / 333FT ABOVE MEAN SEA LEVEL.SUPPLEMENT WILL BE REISSUED WITH EFFECT FROM 23 JULY 2026. |
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