Small aircraft light twin pilot and a beech baron had an near midair collision in pbi class east.

Attributes
ACN	605241
Time
Date	200401
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : phk.vortac
State Reference	FL
Altitude	msl single value : 6000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : pbi.tracon
Operator	general aviation : personal
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	cruise : level
Flight Plan	IFR
Aircraft 2
Make Model Name	Baron 58/58TC
Navigation In Use	other
Flight Phase	cruise : level
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : cfi pilot : multi engine pilot : instrument pilot : atp
Experience	flight time last 90 days : 30 flight time total : 12000 flight time type : 30
ASRS Report	605241
Person 2
Function	flight crew : single pilot
Events
Anomaly	inflight encounter : weather inflight encounter other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 0 vertical : 150
Supplementary
Problem Areas	Flight Crew Human Performance Airspace Structure ATC Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

I was sbound on V-437, 12 mi north of phk VOR (in florida) at my assigned altitude of 6000 ft. Conditions were VFR. A baron crossed under me from my 4 O'clock position, within 100-200 ft of my altitude, turning in an easterly direction. I immediately asked the palm beach approach controller if she saw that traffic. She answered that she was showing his altitude as 4900 ft. I asked to verify my altitude, which she reported as 5900 ft. I assured her that I could nearly see the color of the pilot's eyes. After landing at fxe, I called the palm beach approach watch supervisor to report the near miss. I asked that if he was on a VFR 1200 code, wouldn't the conflict alert go off on the scope? He said, 'not always.' is this a defect in the system? If so, this should be corrected.

Original NASA ASRS Text

Title: SMA LIGHT TWIN PLT AND A BEECH BARON HAD AN NMAC IN PBI CLASS E.

Narrative: I WAS SBOUND ON V-437, 12 MI N OF PHK VOR (IN FLORIDA) AT MY ASSIGNED ALT OF 6000 FT. CONDITIONS WERE VFR. A BARON CROSSED UNDER ME FROM MY 4 O'CLOCK POS, WITHIN 100-200 FT OF MY ALT, TURNING IN AN EASTERLY DIRECTION. I IMMEDIATELY ASKED THE PALM BEACH APCH CTLR IF SHE SAW THAT TFC. SHE ANSWERED THAT SHE WAS SHOWING HIS ALT AS 4900 FT. I ASKED TO VERIFY MY ALT, WHICH SHE RPTED AS 5900 FT. I ASSURED HER THAT I COULD NEARLY SEE THE COLOR OF THE PLT'S EYES. AFTER LNDG AT FXE, I CALLED THE PALM BEACH APCH WATCH SUPVR TO RPT THE NEAR MISS. I ASKED THAT IF HE WAS ON A VFR 1200 CODE, WOULDN'T THE CONFLICT ALERT GO OFF ON THE SCOPE? HE SAID, 'NOT ALWAYS.' IS THIS A DEFECT IN THE SYS? IF SO, THIS SHOULD BE CORRECTED.

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.