B737 Undifferentiated or Other Model
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 5
Communication Breakdown; Human-Machine Interface; Time Pressure
ATC Issue All Types; Conflict Airborne Conflict
Air Traffic Control Issued Advisory / Alert; Air Traffic Control Issued New Clearance; Air Traffic Control Separated Traffic; Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification
Chart Or Publication; Company Policy; Airspace Structure; Procedure
Aircraft X departed on the RNAV departure. Aircraft X checked in on the route climbing to 3;000 ft. I observed an untagged VFR target just north of the Aircraft X flight path; left him at 3;000 ft. and issued traffic. The pilot responded shortly thereafter that he had the traffic in sight. I still did not want to issue him a climb until he passed by the target to avoid them receiving an RA. Moments later; I observed the VFR target start a quick descent. I turned Aircraft X to a 240 heading to avoid the target. The pilot informed me that the target was turning southbound now into them and descending rapidly. I advised them to maintain visual separation and climb to 15;000 ft. Targets came within 1 nm and 0 lateral. I queried the pilot; after they were clear of traffic and climbing; if they received an RA. They did not but the pilot said he was not comfortable at all with the situation.Events like this are becoming more and more common with this airport departures. There needs to be Class C airspace. VFR aircraft continually fly West and South of the field in extremely close proximity to IFR departures without talking to ATC. I know our facility was working on developing a Class C for this airport several years ago but got a ton of pushback from AOPA. It needs to happen now; there is going to be a fatal accident.
TRACON Controller reported a traffic conflict between an air carrier and a VFR aircraft.