GNSS/GPS systems and RNAV procedures may be unavailable or degraded within the MMMZ and MMTY ACCs.

B1840/26

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NavNavigation Aid Status

2026-09-14 21:12 - 2026-10-14 23:59

Duration:2 months

Period of Applicability

2026-09-14 21:12 - 2026-10-14 23:59

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Interpretation

Potentially hazardous GPS testing may cause GNSS/GPS navigation systems, including WAAS, GBAS and ADS-B, and RNAV procedures to be unavailable or degraded on airway segments within the MMMZ and MMTY ACCs. Pilots should anticipate possible GNSS/GPS loss, use conventional navigation aids as necessary, monitor emergency frequency 121.5 MHz and report GPS anomalies to ATC.

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Raw NOTAM

B1840/26 NOTAMN
Q) MMFR/QGWXX///AE/000/999/
A) MMFO
B) 2609142112
C) 2610142359
E) DUE TO VARIOUS FAA NOTIFICATIONS REGARDING POTENTIALLY HAZARDOUS GPS
TESTING ACTIVITY WHICH MAY CAUSE INTERFERENCE, GNSS/GPS NAVIGATION
SYSTEMS (INCLUDING WAAS, GBAS,AND ADS-B) AND RNAV PROCEDURES MAY BE
UNAVAILABLE OR DEGRADED IN AWY SEGMENTS WITHIN ACC MMMZ AND MMTY.
PILOTS MUST ANTICIPATE POSSIBLE GNSS/GPS UNAVAILABILITY, AND IN ITS
CASE THE USE OF CONVENTIONAL NAVIGATION AIDS AS NECESSARY, MONITOR
EMERGENCY FREQUENCY 121.5MHZ, AND REPORT ANY GPS ANOMALIES TO ATC.

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