Air carrier X had airborne conflict with military spc evasive action taken. See and avoid concept.

Attributes
ACN	201380
Time
Date	199203
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : nhz
State Reference	ME
Altitude	msl bound lower : 5500 msl bound upper : 5500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : bgr
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	VFR
Aircraft 2
Operator	other
Make Model Name	Experimental
Flight Phase	descent other
Route In Use	enroute : on vectors
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	201380
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : airborne less severe
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 18000
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

My aircraft was air carrier X VFR from bos to bgr cruising at 5500 ft VFR off the coast of maine. We were working with brunswick approach control when they pointed out a military spc to our right and above us. The spc was paralleling our course but was cleared to turn toward us and descend. After his turn he appeared to be closing horizontal with us but still remained above us. At approximately 3 mi (per approach) the spc reported us in sight. Until this time we did not change course. After reporting us in sight, the spc appeared to accelerate his rate of descent (he visibly nosed over) and we had to bank sharply to the right to avoid what we felt would be a very close encounter.

Original NASA ASRS Text

Title: ACR X HAD AIRBORNE CONFLICT WITH MIL SPC EVASIVE ACTION TAKEN. SEE AND AVOID CONCEPT.

Narrative: MY ACFT WAS ACR X VFR FROM BOS TO BGR CRUISING AT 5500 FT VFR OFF THE COAST OF MAINE. WE WERE WORKING WITH BRUNSWICK APCH CTL WHEN THEY POINTED OUT A MIL SPC TO OUR R AND ABOVE US. THE SPC WAS PARALLELING OUR COURSE BUT WAS CLRED TO TURN TOWARD US AND DSND. AFTER HIS TURN HE APPEARED TO BE CLOSING HORIZ WITH US BUT STILL REMAINED ABOVE US. AT APPROX 3 MI (PER APCH) THE SPC RPTED US IN SIGHT. UNTIL THIS TIME WE DID NOT CHANGE COURSE. AFTER RPTING US IN SIGHT, THE SPC APPEARED TO ACCELERATE HIS RATE OF DSCNT (HE VISIBLY NOSED OVER) AND WE HAD TO BANK SHARPLY TO THE R TO AVOID WHAT WE FELT WOULD BE A VERY CLOSE ENCOUNTER.

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.