| 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 | 008 | 800 feet QNE | | | / | | | Centre Latitude | 5110N | 51° 10' North' | | Centre Longitude | 00122W | 1° 22' West | | Radius of area affected | 001 | 1 nautical miles |
| | E BAND HIGH INTENSITY RADIO TRANSMISSION AREA ( HIRTA ) IN LOW FLYING AREA 1A,NIGHT ROTARY REGION 1 AND AT POSITION 511004N 0012156W,( BARTON STACEY,HAMPSHIRE ) RADIUS 0.5NM.MAXIMUM HEIGHT 400FT ABOVE GROUND LEVEL.25 / 02 / 131 / LFC SAFE DISTANCES CIVILIAN AIRCRAFT 0.1261NM 143FT ABOVE GROUND LEVEL MILITARY AIRCRAFT SUSCEPTIBILITY VERY LOW 0.1080NM 39FT ABOVE GROUND LEVEL LOW 0.1267NM 146FT ABOVE GROUND LEVEL MEDIUM 0.1375NM 208FT ABOVE GROUND LEVEL HIGH 0.1671NM 377FT ABOVE GROUND LEVEL PULSE LOW 0.1080NM 39FT ABOVE GROUND LEVEL PULSE MEDIUM 0.1080NM 39FT ABOVE GROUND LEVEL PULSE HIGH 0.1289NM 159FT ABOVE GROUND LEVEL |
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