B737 Undifferentiated or Other Model
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 209; Flight Crew Total 4984; Flight Crew Type 4984
Inflight Event / Encounter Other / Unknown
General None Reported / Taken
Procedure
When cruising near GAROT Intersection; we experienced a dual GPS failure and XPDR FAIL light. This appeared to be GPS jamming. Another aircraft behind us reported the same issue. Center stated that the GPS jamming was not due to commence for 90 more minutes. Unscheduled GPS jamming is a serious safety issue.
B737 Captain reported experiencing GPS jamming while in cruise flight.