Small Transport
Air Traffic Control Fully Certified
Situational Awareness; Time Pressure
Conflict Airborne Conflict; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued New Clearance; Flight Crew Returned To Clearance
Human Factors; Procedure; Environment - Non Weather Related
Aircraft X was on the instrument approach into JHM. The Aircraft before him reported BKN048 10 NW of the airport. Aircraft X was 15 NW of JHM descending when a VFR aircraft on a 1200 squawk departed JHM head on. I issued traffic advisories to Aircraft X but had no idea who the other aircraft was. Traffic advisories became traffic alerts 5 miles between the two aircraft at 4800 (same ALT). Then at two miles at 4800 the Captain says 'I'm going right'. A right turn would have put the Aircraft X even closer and the targets would have merged. I told the Aircraft X to make a left 360 before proceeding back on course; they were below the MVA at the time but over water. I noticed Aircraft X had climbed to 5000 and asked if they had an RA. The pilot replied in the affirmative and I reported it to my Supervisor. Later we found out the other aircraft was Aircraft Y when they requested flight following from the adjacent sector. Recommendations:1. Request flight following in and out of JHM.2. JHM issues a VFR code on the ground and has them contact HCF on departure.3. Development of a VFR procedure where aircraft remain clear of the final approach course.
HCF Controller reported an airborne conflict between an IFR departure and a VFR aircraft.