Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 5
Situational Awareness; Confusion
ATC Issue All Types; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued Advisory / Alert; Air Traffic Control Issued New Clearance; Flight Crew Became Reoriented
Airspace Structure; Chart Or Publication; Human Factors
I took over the sector. The previous Controller told me Aircraft X was on the airway at 13;000 ft. I took over the sector; some time lapsed; and I began to see Aircraft X's tag flashing MSAW (Minimum Safe Altitude Warning). This happens a lot even when the airplane is established on an airway; I didn't think much of it. After about a minute I took a closer look and asked him if he was established on the Victor Airway. He said he was. I then looked up on the above-head map and saw where he was further south than where he was supposed to be. I measured and he was 6.7 miles away from the Victor Airway; he was in the 13;400 MIA (Minimum IFR Altitude) at this time. He looked to be on the Q route; opposed to the Victor Airway. I called over my Controller in Charge; told him and then gave him a low altitude alert; climbed him to 14;000. He then thanked me for the help a couple minutes later. The pilot must have put something wrong into his FMS; or was just flying the incorrect route. Lack of concentration on the pilot's end was the problem.
Center Controller reported an aircraft deviated off course and flew below the Minimum IFR Altitude.