| 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 | 005 | 500 feet QNE | | | / | | | Centre Latitude | 5225N | 52° 25' North' | | Centre Longitude | 00033E | 0° 33' East | | Radius of area affected | 001 | 1 nautical miles |
| | E BAND HIGH INTENSITY RADIO TRANSMISSION AREA ( HIRTA ) IN LOW FLYING AREA 5 AND NIGHT ROTARY REGION 4B AT POSITION 522446N 0003326E,LAKENHEATH,WEST SUFFOLK ) RADIUS 0.2NM.MAXIMUM HEIGHT 321FT ABOVE GROUND LEVEL.24 / 11 / 217 / LFC SAFE DISTANCES USAF MILITARY AIRCRAFT 0.1213 NM 87FT ABOVE GROUND LEVEL MILITARY AIRCRAFT SUSCEPTIBILITY VERY LOW 0.1132 NM 37FT ABOVE GROUND LEVEL LOW 0.1244 NM 105FT ABOVE GROUND LEVEL MEDIUM 0.1339 NM 163FT ABOVE GROUND LEVEL HIGH 0.1598 NM 321FT ABOVE GROUND LEVEL PULSE LOW 0.1080 NM 6FT ABOVE GROUND LEVEL PULSE MEDIUM 0.1115 NM 27FT ABOVE GROUND LEVEL PULSE HIGH 0.1151 NM 49FT ABOVE GROUND LEVEL |
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