| 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 | 005 | 500 feet QNE | | | / | | | Centre Latitude | 5138N | 51° 38' North' | | Centre Longitude | 00447W | 4° 47' West | | Radius of area affected | 001 | 1 nautical miles |
| | D BAND HIGH INTENSITY RADIO TRANSMISSION AREA ( HIRTA ) IN LOW FLYING AREA 7 AND NIGHT SECTOR 5DS AND NIGHT ROTARY REGION 7S AT POSITION 513809N 0044703W,( MANORBIER,LYDSTEP ) RADIUS 0.6NM.MAXIMUM HEIGHT 300FT ABOVE GROUND LEVEL.25 / 02 / 144 / LFC SAFE DISTANCES CIVILIAN AIRCRAFT 0.0516NM 226FT ABOVE GROUND LEVEL MILITARY AIRCRAFT SUSCEPTIBILITY VERY LOW 0.0198NM 33FT ABOVE GROUND LEVEL LOW 0.0277NM 81FT ABOVE GROUND LEVEL MEDIUM 0.0344NM 122FT ABOVE GROUND LEVEL HIGH 0.0527NM 232FT ABOVE GROUND LEVEL PULSE LOW 0.0250NM 65FT ABOVE GROUND LEVEL PULSE MEDIUM 0.0339NM 118FT ABOVE GROUND LEVEL PULSE HIGH 0.0516NM 226FT ABOVE GROUND LEVEL |
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