Near midair collision occurred between a C560 descending and a C172 at 6500 ft near vrb.

Attributes
ACN	604035
Time
Date	200312
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : vrb.airport
State Reference	FL
Altitude	msl single value : 6500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zma.artcc
Operator	general aviation : corporate
Make Model Name	Citation V
Operating Under FAR Part	Part 91
Flight Phase	descent : intermediate altitude
Route In Use	arrival : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zma.artcc
Make Model Name	Skyhawk 172/Cutlass 172
Flight Phase	cruise : level
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : instrument pilot : multi engine pilot : atp
Experience	flight time last 90 days : 100 flight time total : 5305 flight time type : 2288
ASRS Report	604035
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Events
Anomaly	conflict : nmac conflict : airborne critical non adherence : far other anomaly other
Independent Detector	atc equipment other atc equipment : radar/mode c other controllera other flight crewa other flight crewb other other : 3
Resolutory Action	controller : issued advisory flight crew : took evasive action
Miss Distance	horizontal : 0 vertical : 100
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance

Narrative:

While being vectored by ZMA, we were told of a C172 at 1 O'clock position and 6500 ft. We were in a descent. My first officer saw the traffic about 100 ft above the C172's altitude. I was manipulating the controls and immediately disconnected the autoplt and leveled off. During this maneuver ATC advised us again of the traffic. We then advised ATC of the near miss. I was surprised that this vector was given since the C172 was participating VFR.

Original NASA ASRS Text

Title: NMAC OCCURRED BTWN A C560 DSNDING AND A C172 AT 6500 FT NEAR VRB.

Narrative: WHILE BEING VECTORED BY ZMA, WE WERE TOLD OF A C172 AT 1 O'CLOCK POS AND 6500 FT. WE WERE IN A DSCNT. MY FO SAW THE TFC ABOUT 100 FT ABOVE THE C172'S ALT. I WAS MANIPULATING THE CTLS AND IMMEDIATELY DISCONNECTED THE AUTOPLT AND LEVELED OFF. DURING THIS MANEUVER ATC ADVISED US AGAIN OF THE TFC. WE THEN ADVISED ATC OF THE NEAR MISS. I WAS SURPRISED THAT THIS VECTOR WAS GIVEN SINCE THE C172 WAS PARTICIPATING VFR.

Data retrieved from NASA's ASRS site as of July 2007 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.