Cessna Single Piston Undifferentiated or Other Model
Air Traffic Control Developmental
Air Traffic Control Time Certified In Pos 1 (yrs) 2
Training / Qualification; Situational Awareness; Human-Machine Interface; Communication Breakdown; Distraction
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued New Clearance
Manuals; Procedure; ATC Equipment / Nav Facility / Buildings; Airspace Structure; Human Factors
I called the [Radar Controller] for a briefing. During the briefing Aircraft X was given an approach clearance for the ILS XX [at] ZZZ. The [Radar Controller] indicated it would be a missed approach by point at a flight plan on file departing ZZZ. When he asked if I had questions at the end of the briefing; I inquired about the ZZZ1 radar outage and made a comment about its implications. We were now on the same page. The missed approach on the ILS goes to 4000 ft. We had traffic at 5000 ft. looking for a visual approach to ZZZ2. The [Radar Controller] said they would vector the ILS traffic on the missed approach. VFR conditions prevailed at ZZZ. Aircraft X checked in on the missed approach and mode C indicated 1000 ft. Radar was not lost during the approach. The [Radar Controller] immediately vectored the aircraft to a 040 heading. We commonly utilize vectors below the MIA (Minimum IFR Altitude) at ZZZ; but this is not available when the ZZZ1 radar is out of service. In this case; both the [Radar Controller] and [Radar Assist] didn't catch the error in a timely manner. I noticed the error occurred when I called ZZZ3 Approach to [request] the aircraft direct ZZZZZ and climbing to 4000 ft. I immediately told the [Radar Controller] after. We commonly use vectors below the MIA and know the implications of ZZZ1 radar outage. Many use a visual memory aid by marking a cross over the radar station when its inoperative. The outage window on the EDST (Enroute Decision Support Tool) and radar screen are suppressed during normal operations. Outages like VORs and RADAR are easily missed or disregarded. Perhaps better memory aids could be used.
Center Controller reported a radar site outage caused confusion leading to the Radar Controller vectoring an aircraft below the Minimum IFR Altitude.