GPS testing is ongoing near our training areas and may result in unreliable or unavailable GPS signal. REPORT SIGNAL LOSS TO ATC OR AFSS! Additional information can be found at: https://www.faasafety.gov/files/notices/2011/Dec/WSMR_11-11G_GPS_Flight_Advisory.pdf Check NOTAMs frequently for possible changes. The current version, known as WSMR 11-11G, was released on 5 December 2011.