Large Transport; Low Wing; 2 Turbojet Eng
Air Traffic Control Developmental
Fatigue; Situational Awareness; Training / Qualification
ATC Issue All Types; Conflict NMAC; Deviation - Track / Heading All Types
General None Reported / Taken
Procedure; Human Factors; Airspace Structure
Aircraft X declared a NMAC with Aircraft Y after Aircraft Y went through the final approach course for the parallel runway. Aircraft Y was told to maintain visual separation with Aircraft X and they acknowledged. Several factors played a role during this event. I believe time on position and having the position combined played a role. Also; I had trained for approximately 3.5 hours and had 3 different trainers in that time span. However; Aircraft Y was given a heading approximately 1.5 NM from the final approach course and cleared for a Visual Approach. If the aircraft turned in a timely manner; this would not have been a factor. Sectors should be split as much as possible. Also; training with the same trainer during the entire session should be done to the maximum extent possible.
An aircraft failed to intercept the final approach course and deviated into the path of the parallel runway traffic. The parallel runway traffic filed a NMAC.