Mlt X had near midair collision with VFR aircraft. Evasive action taken. See and avoid concept.

Attributes
ACN	194366
Time
Date	199111
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : mrb
State Reference	WV
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	artcc : zdc artcc : zob
Operator	other
Make Model Name	Medium Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other descent other
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	None
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 24
ASRS Report	194366
Person 2
Affiliation	government : military
Function	flight crew : captain oversight : pic
Qualification	pilot : military
Events
Anomaly	conflict : nmac
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 0 vertical : 300
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

I took a handoff on mlt X at mrb at 5000 ft northbound to hgr for landing, the aircraft came on my frequency 5 north of mrb. I immediately advised mlt X, traffic 12 O'clock, 2 mi, VFR at 5000 head-on, you are cleared to dive or climb at your discretion.' mlt X said I'm diving. Seconds went by and he advised he was climbing back to 5000 ft and it was a good call. Both aircraft disappeared on the radar for a few seconds and when they returned I saw one hit of 5200 ft on the VFR and a final of 3400 ft next sweep. I was busy and did not watch VFR after that. I immediately called iadz north low and advised I was diving in his airspace due to head on traffic at 5000 ft, when said he was diving. I never considered turning mlt X because I don't think the beacons could come apart in time, plus mlt X if he signed same, could lose sight under his wing in a turn. Just prior to this instance (maybe 15 mins) I asked another aircraft over mrb at 7000 ft if traffic was called 10 O'clock, 3 mi, converging VFR at 7300 ft. He said negative. In conclusion, I think iadz should be more aware of traffic in their area, prior to transfer of control to center, both situations were in their airspace!

Original NASA ASRS Text

Title: MLT X HAD NMAC WITH VFR ACFT. EVASIVE ACTION TAKEN. SEE AND AVOID CONCEPT.

Narrative: I TOOK A HDOF ON MLT X AT MRB AT 5000 FT NBOUND TO HGR FOR LNDG, THE ACFT CAME ON MY FREQ 5 N OF MRB. I IMMEDIATELY ADVISED MLT X, TFC 12 O'CLOCK, 2 MI, VFR AT 5000 HEAD-ON, YOU ARE CLRED TO DIVE OR CLB AT YOUR DISCRETION.' MLT X SAID I'M DIVING. SECONDS WENT BY AND HE ADVISED HE WAS CLBING BACK TO 5000 FT AND IT WAS A GOOD CALL. BOTH ACFT DISAPPEARED ON THE RADAR FOR A FEW SECONDS AND WHEN THEY RETURNED I SAW ONE HIT OF 5200 FT ON THE VFR AND A FINAL OF 3400 FT NEXT SWEEP. I WAS BUSY AND DID NOT WATCH VFR AFTER THAT. I IMMEDIATELY CALLED IADZ N LOW AND ADVISED I WAS DIVING IN HIS AIRSPACE DUE TO HEAD ON TFC AT 5000 FT, WHEN SAID HE WAS DIVING. I NEVER CONSIDERED TURNING MLT X BECAUSE I DON'T THINK THE BEACONS COULD COME APART IN TIME, PLUS MLT X IF HE SIGNED SAME, COULD LOSE SIGHT UNDER HIS WING IN A TURN. JUST PRIOR TO THIS INSTANCE (MAYBE 15 MINS) I ASKED ANOTHER ACFT OVER MRB AT 7000 FT IF TFC WAS CALLED 10 O'CLOCK, 3 MI, CONVERGING VFR AT 7300 FT. HE SAID NEGATIVE. IN CONCLUSION, I THINK IADZ SHOULD BE MORE AWARE OF TFC IN THEIR AREA, PRIOR TO TRANSFER OF CTL TO CENTER, BOTH SITUATIONS WERE IN THEIR AIRSPACE!

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.