| Significance | Code | Meaning |
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| 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 | 006 | 600 feet QNE | | | / | | | Centre Latitude | 5244N | 52° 44' North' | | Centre Longitude | 00057E | 0° 57' East | | Radius of area affected | 002 | 2 nautical miles |
| | E BAND HIGH INTENSITY RADIO TRANSMISSION AREA ( HIRTA ) IN LOW FLYING AREA 5 AND NIGHT ROTARY REGION AT 5 POSITION 524345N 0005716E,( BRECKLAND DISTRICT,NORFOLK ) RADIUS 1NM.MAXIMUM HEIGHT 377FT ABOVE GROUND LEVEL.24 / 12 / 0025 / LFC SAFE DISTANCES CIVILIAN AIRCRAFT 0.0451NM 143FT ABOVE GROUND LEVEL MILITARY AIRCRAFT SUSCEPTIBILITY VERY LOW 0.0329NM 73FT ABOVE GROUND LEVEL LOW 0.0457NM 146FT ABOVE GROUND LEVEL MEDIUM 0.0565NM 208FT ABOVE GROUND LEVEL HIGH 0.0861NM 377FT ABOVE GROUND LEVEL PULSE LOW 0.0322NM 69FT ABOVE GROUND LEVEL PULSE MEDIUM 0.0375NM 99FT ABOVE GROUND LEVEL PULSE HIGH 0.0479NM 159FT ABOVE GROUND LEVEL |
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