Hcf TRACON controller had to vector an air carrier off of the ILS approach to avoid unidentified con...

Narrative:

Aircraft X was enroute and was cleared ILS approach. A VFR 1200 code target tracking east of the localizer northbound climbing slowly. I called traffic to aircraft X several times but they were unable to get a visual on the 1200 code. I canceled aircraft X's approach clearance and assigned 9000 feet. The VFR target began to turn to cross the localizer and toward aircraft X and so I turned aircraft X 10 degrees right. The targets were close; about 600 feet and about 1 mile lateral. Aircraft X reported the traffic in sight and was re cleared for the ILS approach. Several minutes later the VFR aircraft identified itself as aircraft Y. Company traffic; aircraft Z had reported to me that aircraft Y following him out of koa. I had reached out to aircraft Y but they were not on frequency. When aircraft Y did come up on frequency I asked if they had had the aircraft X in sight and he responded that he had. I asked as professionally and courteously as I know how that he please contact center for VFR advisories in the future to avoid this situation in the future. This airport is way past being serviced by enroute radar approach control. There absolutely needs to be a terminal radar and class C services to that airport.

Original NASA ASRS Text

Title: HCF TRACON Controller had to vector an air carrier off of the ILS Approach to avoid unidentified conflicting VFR traffic.

Narrative: Aircraft X was enroute and was cleared ILS Approach. A VFR 1200 code target tracking east of the localizer northbound climbing slowly. I called traffic to Aircraft X several times but they were unable to get a visual on the 1200 code. I canceled Aircraft X's approach clearance and assigned 9000 feet. The VFR target began to turn to cross the localizer and toward Aircraft X and so I turned Aircraft X 10 degrees right. The targets were close; about 600 feet and about 1 mile lateral. Aircraft X reported the traffic in sight and was re cleared for the ILS Approach. Several minutes later the VFR aircraft identified itself as Aircraft Y. Company traffic; Aircraft Z had reported to me that Aircraft Y following him out of KOA. I had reached out to Aircraft Y but they were not on frequency. When Aircraft Y did come up on frequency I asked if they had had the Aircraft X in sight and he responded that he had. I asked as professionally and courteously as I know how that he please contact center for VFR advisories in the future to avoid this situation in the future. This airport is way past being serviced by enroute radar approach control. There absolutely needs to be a terminal radar and Class C services to that airport.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1646422
Time
Date	201905
Local Time Of Day	1801-2400
Place
Locale Reference	KOA.Airport
State Reference	HI
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft
Flight Phase	Climb
Route In Use	VFR Route
Flight Plan	VFR
Person 1
Function	Enroute
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 6
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict
Miss Distance	Horizontal 5280 Vertical 600

Hcf TRACON controller had to vector an air carrier off of the ILS approach to avoid unidentified conflicting VFR traffic.