Two IFR aircraft on converging courses at the same altitude have conflict.

Attributes
ACN	139750
Time
Date	199003
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : srq
State Reference	FL
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : tpa
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller military : 4 controller radar : 8
ASRS Report	139750
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument
Events
Anomaly	non adherence : required legal separation non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 0 vertical : 100
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Traffic volume may have caused this incident and overlapping data blocks. I was operating and working the sarasota radar sector out of tampa approach. I had approximately ten aircraft on my frequency. One of the involved aircraft of this incident was filed from spg direct to fmy to mth from north to south. The second aircraft airfield from vnc to lal to rbm. Both aircraft were filed for 5000'. Cruising altitude. Both aircraft passed each other at 5000' both aircraft saw each other. As the sector controller I missed what was occurring until one of the pilots said he had had a near miss.

Original NASA ASRS Text

Title: TWO IFR ACFT ON CONVERGING COURSES AT THE SAME ALT HAVE CONFLICT.

Narrative: TFC VOLUME MAY HAVE CAUSED THIS INCIDENT AND OVERLAPPING DATA BLOCKS. I WAS OPERATING AND WORKING THE SARASOTA RADAR SECTOR OUT OF TAMPA APCH. I HAD APPROX TEN ACFT ON MY FREQ. ONE OF THE INVOLVED ACFT OF THIS INCIDENT WAS FILED FROM SPG DIRECT TO FMY TO MTH FROM N TO S. THE SECOND ACFT AIRFIELD FROM VNC TO LAL TO RBM. BOTH ACFT WERE FILED FOR 5000'. CRUISING ALT. BOTH ACFT PASSED EACH OTHER AT 5000' BOTH ACFT SAW EACH OTHER. AS THE SECTOR CTLR I MISSED WHAT WAS OCCURRING UNTIL ONE OF THE PLTS SAID HE HAD HAD A NEAR MISS.

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.