| 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 | 5053N | 50° 53' North' | | Centre Longitude | 00117W | 1° 17' West | | Radius of area affected | 001 | 1 nautical miles |
| | E BAND HIGH INTENSITY RADIO TRANSMISSION AREA ( HIRTA ) IN LOW FLYING AREA 18,NIGHT ROTARY REGION 18 AND BORNEMOUTH / PORTSMOUTH / ILSE OF WHITE AVOIDANCE AREA AT POSITION 505308N 0011713W,( SWANWICK,FAREHAM ) RADIUS 0.8NM.MAXIMUM HEIGHT 400FT ABOVE GROUND LEVEL.25 / 05 / 235 / LFC SAFE DISTANCES CIVILIAN AIRCRAFT 0.0397NM 143FT ABOVE GROUND LEVEL MILITARY AIRCRAFT SUSCEPTIBILITY VERY LOW CW SUSCEPTIBILITY 0.03693NM 127FT ABOVE GROUND LEVEL LOW CW SUSCEPTIBILITY 0.0403NM 146FT ABOVE GROUND LEVEL CW SUSCEPTIBILITY 0.0511NM 208FT ABOVE GROUND LEVEL HIGH SUSCEPTIBILITY 0.0807NM 377FT ABOVE GROUND LEVEL PULSE LOW SUSCEPTIBILITY 0.0268NM 69FT ABOVE GROUND LEVEL PULSE MEDIUM SUSCEPTIBILITY 0.0321NM 99FT ABOVE GROUND LEVEL PULSE HIGH SUSCEPTIBILITY 0.0425NM 159FT ABOVE GROUND LEVEL |
|
