Short-time interference may affect surveillance systems with possible TCAS false targets within the TMA.

A8669/25

EST

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COMSurveillance Systems

2025-11-22 10:20 - 2026-05-21 21:00

Duration:VERY LONG7 months EST

Period of Applicability

2025-11-22 10:20 - 2026-05-21 21:00

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Interpretation

Short-time interference on the RBS Mode SRY surveillance frequency and possible false marks on TCAS displays within the ULLI TMA area of responsibility.

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Raw NOTAM

A8669/25 NOTAMR A6354/25
Q) ULLL/QATXX/IV/NBO/A/000/999/5948N03016E025
A) ULLI B) 2511221020 C) 2605212100 EST
E) SHORT-TIME INTERFERENCE ON RBS MODE SRY SURVEILLANCE FREQ AND
OCCURRENCE OF FALSE MARKS ON TCAS DISPLAYS POSS WI ULLI TMA AREA OF
RESPONSIBILITY.

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