ZMA controller reports of an near midair collision report he heard about; while off-line doing other...

Narrative:

I was on the d-side position coordinating an inbound on aircraft X who was on a vector for the visual approach. When I came off the line the pilot told the r-side that he had a near miss. When I looked I saw a VFR target behind the aircraft at 2;800 feet. I did not see that aircraft before I went on the line to coordinate. I also don't know if the aircraft had t-cas because he never said anything about a TA or RA.I would recommend that controllers are better trained to balance workload and service. In a terminal environment there are times when VFR flight following is not possible due to the amount of traffic calls that are required. It takes time and attention out of your scan for IFR traffic. I would also recommend that sector 03 and 04 be split earlier regardless of arbitrary traffic numbers. Sector 03 is a unique sector and requires constant attention to traffic calls; if we split it all the time it is easier to stay on top of those calls.

Original NASA ASRS Text

Title: ZMA Controller reports of an NMAC report he heard about; while off-line doing other coordination. IFR and VFR aircraft.

Narrative: I was on the D-side position coordinating an inbound on Aircraft X who was on a vector for the visual approach. When I came off the line the pilot told the R-side that he had a near miss. When I looked I saw a VFR target behind the aircraft at 2;800 feet. I did not see that aircraft before I went on the line to coordinate. I also don't know if the aircraft had T-CAS because he never said anything about a TA or RA.I would recommend that Controllers are better trained to balance workload and service. In a terminal environment there are times when VFR flight following is not possible due to the amount of traffic calls that are required. It takes time and attention out of your scan for IFR traffic. I would also recommend that Sector 03 and 04 be split earlier regardless of arbitrary traffic numbers. Sector 03 is a unique sector and requires constant attention to traffic calls; if we split it all the time it is easier to stay on top of those calls.

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	1230290
Time
Date	201501
Local Time Of Day	1201-1800
Place
Locale Reference	ZMA.ARTCC
State Reference	FL
Environment
Light	Daylight
Aircraft 1
Make Model Name	Small Transport Low Wing 2 Turbojet Eng
Flight Phase	Cruise
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Enroute
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 4.5
Events
Anomaly	ATC Issue All Types Conflict NMAC

ZMA controller reports of an near midair collision report he heard about; while off-line doing other coordination. IFR and VFR aircraft.