Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Workload; Troubleshooting; Situational Awareness; Human-Machine Interface; Confusion; Distraction
ATC Issue All Types; Aircraft Equipment Problem Less Severe
Flight Crew Requested ATC Assistance / Clarification; Flight Crew Overcame Equipment Problem; Flight Crew Became Reoriented
ATC Equipment / Nav Facility / Buildings; Human Factors; Software and Automation
GPS jamming encountered between XA21Z and XA52Z at 33;000 feet.  Jamming resulted in immediate loss of ADS-B and GPS left and right.  Once jamming ceased all system function returned to normal.  Informed ATC immediately of the jamming and then again informed ATC when our actual navigation performance was going to require vectors.  As soon as I notified ATC that we were at the point of navigation degradation beyond acceptable performance;  the jamming ceased immediately.  I believe the parties responsible were monitoring ATC frequencies. [Cause was] Some form of GPS Jamming - extremely long period. It usually happens for much shorter periods that is less than 3 minutes. Identify the parties responsible and remove them from the equation.
Air carrier Captain flying over foreign territory reported GPS jamming which ceased as soon as the Captain notified ATC.