Possible brief disruptions in Sankt-Peterburg TMA affecting secondary radar control frequency and TCAS screens.

A3697/25

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Radio Frequency Changes

2025-05-28 06:40 - 2025-08-21 23:59

Period of Applicability

2025-05-28 06:40 - 2025-08-21 23:59

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Interpretation

There may be brief disruptions within the Sankt-Peterburg TMA on the frequency used for secondary radar control of RBS mode, which could also result in false marks on TCAS screens.

Message

POSS BRIEF DISRUPTIONS WI SANKT-PETERBURG TMA ON FREQ USED FOR SECONDARY RADAR CONTROL OF RBS MODE, ALSO POSS FALSE MARKS ON TCAS SCREENS.

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Raw NOTAM

A3697/25 NOTAMN
Q) ULLL/QATXX/IV/NBO/A/000/999/5948N03016E025
A) ULLI B) 2505280640 C) 2508212359 EST
E) POSS BRIEF DISRUPTIONS WI SANKT-PETERBURG TMA ON FREQ USED FOR
SECONDARY RADAR CONTROL OF RBS MODE, ALSO POSS FALSE MARKS ON
TCAS SCREENS.

Issued at: 2025-05-28 07:08

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