MD-11
Flight Crew Multiengine; Flight Crew Private; Flight Crew Commercial; Flight Crew Instrument
Distraction; Situational Awareness; Troubleshooting
Aircraft Equipment Problem Less Severe; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Issued Advisory / Alert; Flight Crew Overcame Equipment Problem; Flight Crew FLC Overrode Automation; Flight Crew Became Reoriented
ATC Equipment / Nav Facility / Buildings; Environment - Non Weather Related
In cruise flight at FL340 northbound direct to NINVA (FIR boundary Turkey). We received ATC transponder 1 & 2 alerts/ADS B out fault; along with GNS sensor fail messages. We expected these to be associated with GPS jamming and complied QRH procedures. During the evaluation of these malfunctions and unannounced to us; the aircraft reverted into speed; heading and altitude hold (white annunciations). During this time the aircraft reached NINVA and did not turn towards SRT as it was not in NAV mode. We noticed the error and were also queried by ATC. Less than five miles off course; we corrected and were given direct SRT. Flight continued to destination without further incident.  GPS jamming caused PROF/NAV issues.  Better monitoring and awareness during GPS jamming and transponder issues.
[Report narrative contained no additional information.]
MD-11 pilot crew reported possible GPS jamming.