| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | RO | Overflying restriction | | | XX | miscellaneous plain language | | | / | | | Traffic | I | IFR traffic affected | | | V | VFR traffic affected | | | / | | | Purpose | N | For immediate attention of aircraft operators | | | 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 | 009 | 900 feet QNE | | | / | | | Centre Latitude | 5134N | 51° 34' North' | | Centre Longitude | 00119W | 1° 19' West | | Radius of area affected | 001 | 1 nautical miles |
| | D AND E BAND IDENTICAL SIZE HIGH INTENSITY RADIO TRANSMISSION AREA ( HIRTA ) IN LOW FLYING AREA 4 AND NIGHT ROTARY REGION 1 AT POSITION 513359N 0011903W,( CHILTON,OXFORDSHIRE ) RADIUS 0.2NM.MAXIMUM HEIGHT 270FT ABOVE GROUND LEVEL.24 / 03 / 078 / LFC SAFE DISTANCES CIVILIAN AIRCRAFT 0.6198NM 90FT ABOVE GROUND LEVEL MILITARY AIRCRAFT SUSCEPTIBILITY VERY LOW 0.6025NM 36FT ABOVE GROUND LEVEL LOW 0.6210NM 92FT ABOVE GROUND LEVEL MEDIUM 0.6368NM 140FT ABOVE GROUND LEVEL HIGH 0.6796NM 270FT ABOVE GROUND LEVEL |
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