| 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 | 019 | 1900 feet QNE | | | / | | | Centre Latitude | 5434N | 54° 34' North' | | Centre Longitude | 00224W | 2° 24' West | | Radius of area affected | 002 | 2 nautical miles |
| | E BAND HIGH INTENSITY RADIO TRANSMISSION AREA ( HIRTA ) OPERATING WITHIN 1NM OF POSITION 543341N 0022427W ( MURTON,WESTMORLAND AND FURNESS ) LOW FLYING AREA 17 AND NIGHT SECTOR 3BE.MAXIMUM HEIGHT 569FT ABOVE GROUND LEVEL.26 / 10 / 150 / LFC SAFE DISTANCES CIVILIAN AIRCRAFT 0.1248NM 183FT ABOVE GROUND LEVEL MILITARY AIRCRAFT SUSCEPTIBILITY LOW 0.1262NM 188FT ABOVE GROUND LEVEL MEDIUM 0.1524NM 290FT ABOVE GROUND LEVEL HIGH 0.2238NM 569FT ABOVE GROUND LEVEL |
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