| 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 | 069 | 6900 feet QNE | | | / | | | Centre Latitude | 5209N | 52° 9' North' | | Centre Longitude | 00203W | 2° 3' West | | Radius of area affected | 002 | 2 nautical miles |
| | D BAND HIGH INTENSITY RADIO TRANSMISSION AREA ( HIRTA ) IN LOW FLYING AREA 4 AND NIGHT ROTARY REGION 4C AT POSITION 520844N 0020238W,( THROCKMORTON,WORCESTERSHIRE ) RADIUS 1NM.MAXIMUM HEIGHT 6600FT ABOVE GROUND LEVEL.24 / 04 / 246 / LFC SAFE DISTANCES CIVILIAN AIRCRAFT 0.3690NM 2026FT ABOVE GROUND LEVEL MILITARY AIRCRAFT SUSCEPTIBILITY VERY LOW 0.6620NM 671FT ABOVE GROUND LEVEL LOW 1.0360NM 2088FT ABOVE GROUND LEVEL MEDIUM 1.3530NM 3292FT ABOVE GROUND LEVEL HIGH 2.2170NM 6568FT ABOVE GROUND LEVEL PULSE LOW 1.0260NM 1121FT ABOVE GROUND LEVEL PULSE MEDIUM 1.3380NM 1769FT ABOVE GROUND LEVEL PULSE HIGH 2.1860NM 3533FT ABOVE GROUND LEVEL |
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