B777-200
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Distraction; Situational Awareness; Troubleshooting
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
ATC Equipment / Nav Facility / Buildings
We got a left and then right ADS-B OUT alert at FL370 approaching Iraq airspace while in Southeast Turkey. The GPS signal appeared to be jammed from just east of waypoint OKTEP near N3754; E4235. We regained the GPS signal approximately 15 minutes later just east of waypoint OTIDO; near N3700; E4426. No degradation of the aircraft's other navigation was noted. The aircraft stayed on course throughout the event. Jamming of GPS signal by unknown source. Don't fly in the vicinity of active combat zones.
B777 Captain reported suspected GPS jamming on the route of flight.