Large Transport
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 3.5
Confusion; Situational Awareness
ATC Issue All Types; Conflict Airborne Conflict; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued Advisory / Alert; Air Traffic Control Issued New Clearance; Air Traffic Control Separated Traffic; Flight Crew Became Reoriented; Flight Crew Executed Go Around / Missed Approach; General Flight Cancelled / Delayed
Procedure; Company Policy; Manuals; Chart Or Publication; Aircraft
Aircraft X checked on the frequency for the left runway. I issued a landing clearance and issued parallel traffic which was Aircraft Y. Aircraft Y checked on and I received a low altitude alert. I was issuing the low altitude alert; calling traffic about Aircraft X and issuing control instructions as Aircraft Y started going through their final all simultaneously. As Aircraft Y was now directly under Aircraft X I knew it was safe as Aircraft X was more than a 1000 foot above Aircraft Y. Not knowing what Aircraft Y was going to do; I elected to send Aircraft X around and issued those instructions. Aircraft Y maneuvered as instructed for the correct runway. Aircraft X was vectored for another approach.Adhere to Letter of Agreement to off load foreign carriers to a runway complex without conflicting traffic. A final controller should ensure that foreign carriers; unfamiliar pilots; or anyone in question comply with instructions for final approach course intercept before communications transfer when there is possible conflicting traffic.
DEN Tower Controller observed an aircraft overshoot the final approach course and had to issue parallel runway traffic go-around instructions.