Unreliable GPS signals in Tehran TMA.

A0981/25

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Navigation Aid Status

2025-03-16 08:00 - 2025-06-14 20:30

Period of Applicability

2025-03-16 08:00 - 2025-06-14 20:30

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Interpretation

GPS signals are unreliable and may be unavailable within the Tehran TMA, affecting operations from ground level up to FL275, with potential erroneous indications from EGPWS/GPWS.

Message

GPS UNRELIABLE AND MAY BE UNAVAILABLE WITHIN AREA WITH THE LATERAL LIMITS OF TEHRAN TMA AS SPECIFIED IN IRAN AIP, FM GND UP TO FL275, EGPWS/GPWS MAY DISPLAY ERRONEOUS INDICATION AND MAP SHIFTING, AS R...

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Raw NOTAM

A0981/25 NOTAMR A3668/24
Q) OIIX/QGWAU/IV/NBO/AE/000/275/3542N05117E071
A) OIII B) 2503160800 C) 2506142030 EST
E) GPS UNRELIABLE AND MAY BE UNAVAILABLE WITHIN AREA WITH
THE LATERAL LIMITS OF TEHRAN TMA AS SPECIFIED IN IRAN AIP,
FM GND UP TO FL275,
EGPWS/GPWS MAY DISPLAY ERRONEOUS INDICATION AND MAP SHIFTING,
AS REPORTED FREQUENTLY
PILOTS SHALL REPORT GPS ANOMALIES INCLUDING DEGRADED OPERATION
AND/OR LOSS OF SERVICE, AS SOON AS POSSIBLE
FROM GND - UP TO FL275

Issued at: 2025-03-31 08:49

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