Large Transport; Low Wing; 2 Turbojet Eng
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 200; Flight Crew Total 10186; Flight Crew Type 6594
Distraction; Confusion; Situational Awareness; Workload
ATC Issue All Types; Deviation - Track / Heading All Types
Flight Crew Became Reoriented; Flight Crew Overcame Equipment Problem
ATC Equipment / Nav Facility / Buildings; Procedure
During climb; ATC indicated that we were left of course and recommended a heading to intercept J18 into GBN. We the pilots both showed on course yet dialed in raw data to use since we could not determine what was wrong. We double checked the route and both pilots agreed there was no error. At the next waypoint passage; the aircraft again started to deviate off course and eventually we revived numerous ECAMS and Nav Accuracy Downgrade message and continued to use raw data. As we worked out our problem; numerous other airlines also reported the same problem of GPS failed. A conversation was had with dispatch whom upon further review; discovered that the Military would be deactivating GPS. We reported to Maintenance then cancelled the GPS failures as we had reasonably established the cause of the Nav errors.
Following a track deviation detected by ATC; an air carrier crew began NAVAID navigation along J18 and determined the military had deactivated the GPS. ECAM and NAV accuracy alerts were received.