Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 10
Human-Machine Interface; Situational Awareness; Training / Qualification
ATC Issue All Types; Conflict Airborne Conflict; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued New Clearance; Air Traffic Control Separated Traffic
Human Factors; Procedure
There was training on the Handoff position and the trainee was a little behind causing data blocks to overlap and handoffs were slow which caused the sector to be more chaotic than normal. I descended Aircraft X from 16;000 feet to 10;000 feet with Aircraft Y at 13;000 feet opposite direction. I turned Aircraft X from a 250 heading to a 310 heading after I realized Aircraft X wasn't descending according to aircraft specifications. I issued traffic to Aircraft Y. When he reported traffic in sight; I told him to maintain visual separation. Aircraft Y replied and advised me he received an RA. I gave traffic to Aircraft X that Aircraft Y had him in sight and is maintaining visual separation.I should have used vertical separation.
A ZNY ARTCC Controller descended an aircraft through the altitude of opposite direction traffic.