Interpretation

GPS signals may be unreliable and could be unavailable within the lateral limits of Tehran TMA, from ground level up to FL275. EGPWS/GPWS may display erroneous indications and map shifting, as frequently reported. Pilots are required to report any GPS anomalies including degraded operation or loss of service as soon as possible.

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...

Raw NOTAM

A0980/25 NOTAMR A3669/24
Q) OIIX/QGAAU/I /NBO/A /000/999/3525N05109E005
A) OIIE B) 2503160756 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