Fgrt X had near midair collision with small aircraft Y. Evasive action taken. See and avoid concept.

Attributes
ACN	198514
Time
Date	199201
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : ffo
State Reference	OH
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : day
Operator	other
Make Model Name	Fighter
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Flight Plan	None
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller military : 8 controller radar : 30
ASRS Report	198514
Person 2
Affiliation	government : military
Function	flight crew : single pilot
Qualification	pilot : military
Events
Anomaly	conflict : nmac non adherence : far
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

Fgt X on vectors toffo for an ILS 5L. WX deteriorating as rain and lowering ceilings approached from the southwest. Aircraft level at 3000 heading 090 to intercept localizer. Met unobserved (on radar) small aircraft Y at 3000 skirting dayton arsa. No transponder. Fgt X dove to avoid collision then reported near midair collision 'with red/white small aircraft Y.' small aircraft Y was intermittently observed on radar after incident. Landing area not observed because of lack of consistent radar target.

Original NASA ASRS Text

Title: FGRT X HAD NMAC WITH SMA Y. EVASIVE ACTION TAKEN. SEE AND AVOID CONCEPT.

Narrative: FGT X ON VECTORS TOFFO FOR AN ILS 5L. WX DETERIORATING AS RAIN AND LOWERING CEILINGS APCHED FROM THE SW. ACFT LEVEL AT 3000 HDG 090 TO INTERCEPT LOC. MET UNOBSERVED (ON RADAR) SMA Y AT 3000 SKIRTING DAYTON ARSA. NO TRANSPONDER. FGT X DOVE TO AVOID COLLISION THEN RPTED NMAC 'WITH RED/WHITE SMA Y.' SMA Y WAS INTERMITTENTLY OBSERVED ON RADAR AFTER INCIDENT. LNDG AREA NOT OBSERVED BECAUSE OF LACK OF CONSISTENT RADAR TARGET.

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.