| Significance | Code | Meaning |
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| FIR | EGPX | Scottish 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 | 021 | 2100 feet QNE | | | / | | | Centre Latitude | 5525N | 55° 25' North' | | Centre Longitude | 00136W | 1° 36' West | | Radius of area affected | 002 | 2 nautical miles |
| | E BAND HIGH INTENSITY RADIO TRANSMISSION AREA ( HIRTA ) OPERATING WITHIN 1NM OF POSITION 552515N 0013602W,( BOULMER,NORTHUMBERLAND ) LOW FLYING AREA 12 AND NIGHT SECTOR 4AN.MAXIMUM HEIGHT 1860FT ABOVE GROUND LEVEL.26 / 09 / 115 / LFC SAFE DISTANCES CIVILIAN AIRCRAFT 0.1454NM 605FT ABOVE GROUND LEVEL MILITARY AIRCRAFT SUSCEPTIBILITY VERY LOW 0.0838NM 230FT ABOVE GROUND LEVEL LOW 0.1483NM 622FT ABOVE GROUND LEVEL MEDIUM 0.2030NM 955FT ABOVE GROUND LEVEL HIGH 0.3521NM 1860FT ABOVE GROUND LEVEL PULSE LOW 0.0611NM 92FT ABOVE GROUND LEVEL PULSE MEDIUM 0.0682NM 135FT ABOVE GROUND LEVEL PULSE HIGH 0.0823NM 221FT ABOVE GROUND LEVEL |
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