| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | GW | UNKNOWN CODE | | | XX | miscellaneous plain language | | | / | | | Traffic | I | IFR traffic affected | | | V | VFR traffic affected | | | / | | | Purpose | B | For inclusion in Preflight Infomation Bulletins | | | O | Operationally significant for IFR flights | | | / | | | Scope | E | En-Route information | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 999 | Unlimited | | | / | | | Centre Latitude | 5129N | 51° 29' North' | | Centre Longitude | 00400W | 4° 0' West | | Radius of area affected | 071 | 71 nautical miles |
| | GNSS ( GPS ) SIGNAL AND RADIO FREQUENCY JAMMING.JAMMING ACTIVITY MAY AFFECT AIRCRAFT WITHIN AREA BOUNDED BY STRAIGHT LINES JOINING : 523758N 0040209W-521006N 0023013W-503606N 0034017W-503122N 0035436W-502608N 0035922W-502407N 0043245W-503735N 0050912W-512723N 0044201W-514204N 0045719W-520033N 0042144W-523758N 0040209W.SURFACE TO UNLIMITED.MAY ALSO AFFECT AIRBORNE ELECTRONIC SITUATIONAL AWARENESS DEVICES AND UAS CONTROL.GNSS ( GPS ) RECEIVERS MAY SUFFER INTERMITTENT / TOTAL FAILURE OR GIVE INCORRECT POSITION INFO.SOME ELECTRONIC SITUATIONAL AWARENESS DEVICES AND UAS SYSTEMS MAY SUFFER INTERMITTENT / TOTAL FAILURE OR GIVE INCORRECT NOTIFICATION.FOR INFO / CEASE JAMMING 01874 635599 OR 01980 951989.AIC BRIEFING SHEET 032 / 2025 WITH CHART,REFERS.FURTHER DETAILS WWW.NATS.AERO / AIS.AR-2025-1969 / 01. |
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