GPS may be unreliable or unavailable in Ahwaz CTR, potentially causing erroneous EGPWS/GPWS indications and map shifting.

A1839/26

EST

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NavNavigation Aid Status

GPS may be unreliable or unavailable in Ahwaz CTR, potentially causing erroneous EGPWS/GPWS indications and map shifting.

2026-08-13 07:49 - 2026-11-11 20:30

Duration:LONG4 months EST

Period of Applicability

2026-08-13 07:49 - 2026-11-11 20:30

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Interpretation

GPS is unreliable and may be unavailable within the lateral limits of Ahwaz CTR, as specified in Iran AIP AD 2-7 OIAW item 2.17 ATS airspace No. 1, from ground level to FL175. EGPWS/GPWS may show erroneous indications and map shifting. Pilots shall report GPS anomalies, including degraded operation or loss of service, as soon as possible.

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Raw NOTAM

A1839/26 NOTAMR A1003/26
Q)OIIX/QGAAU/I/NBO/A/000/175/
A)OIAW B)2608130749 C)2611112030EST
E)GPS UNREL AND MAY BE UNAVAILABLE WI AREA
WITH THE LATERAL LIMITS OF AHWAZ CTR AS SPECIFIED
IN IRAN AIP PAGE AD 2-7 OIAW ITEM 2.17 ATS AIRSPACE NR 1,
FM GND UP TO FL175,
EGPWS/GPWS MAY DISPLAY ERRONEOUS INDICATION AND MAP SHIFTING,
AS REPORTED FREQUENTLY PILOTS SHALL REPORT GPS ANOMALIES
INCLUDING DEGRADED OPERATION AND/OR LOSS OF SER, ASAP.
F)GND G)FL175

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