GPS UNRELIABLE AND MAY BE UNAVAILABLE WITHIN AREA WITH
THE LATERAL LIMITS OF TEHRAN TMA AS SPECIFED IN IRAN AIP,
FM GND UP TO FL 275,
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.