Narrative:

Near midair collision between uga X PA-31/right and unknown aircraft mwk to tys. Uga X departed mwk VFR and requested clearance from gso approach. Gso unable to issue clearance due to conflict with military flight (4/F- 15) in ir-721. Gso handed off uga X to ZTL sector 48 (wilkes) VFR. ZTL issued altimeter and called traffic on military flight. Uga X stated traffic in sight. Upon leaving 6000 ft uga X was issued clearance to tys. Pilot read back clearance. Conversation started by pilot. Asked 'can't gso see those guys.' informed pilot that ir-721 is terrain following and radar coverage intermittent. Advised I could not see most of route but I was painting military flight currently at 2000 ft 30 mi south of his position. I observed a trailer 10 mit. At this time, uga X said, 'who was that?' I informed uga X I was not painting any traffic. Uga X advised aircraft 'just missed us.' I asked what altitude the traffic was. He replied aircraft went just behind and below as he was passing 7100 ft MSL. I asked what kind of aircraft, but he didn't get a good look. He stated 'it was real fast.' 30 seconds after near miss I painted a primary target for 3 updates. Target was 5 mi outside ir-721 and fast. I assume it was one of the 4 f- 15's. If it was the F-15 that was involved, he was 15-20 mi outside of ir-721 and 2000 ft high at time of near midair collision without a functioning transponder. Military flight route: gsb ir-721 gsb. Time of incident: approximately XX00Z. This is the third near midair collision I've had in about 8 yrs working this airspace. All involved military aircraft popping up from terrain following rtes. 2 incidents involved no transponder operating.

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Original NASA ASRS Text

Title: NMAC.

Narrative: NMAC BTWN UGA X PA-31/R AND UNKNOWN ACFT MWK TO TYS. UGA X DEPARTED MWK VFR AND REQUESTED CLRNC FROM GSO APCH. GSO UNABLE TO ISSUE CLRNC DUE TO CONFLICT WITH MIL FLT (4/F- 15) IN IR-721. GSO HANDED OFF UGA X TO ZTL SECTOR 48 (WILKES) VFR. ZTL ISSUED ALTIMETER AND CALLED TFC ON MIL FLT. UGA X STATED TFC IN SIGHT. UPON LEAVING 6000 FT UGA X WAS ISSUED CLRNC TO TYS. PLT READ BACK CLRNC. CONVERSATION STARTED BY PLT. ASKED 'CAN'T GSO SEE THOSE GUYS.' INFORMED PLT THAT IR-721 IS TERRAIN FOLLOWING AND RADAR COVERAGE INTERMITTENT. ADVISED I COULD NOT SEE MOST OF RTE BUT I WAS PAINTING MIL FLT CURRENTLY AT 2000 FT 30 MI S OF HIS POS. I OBSERVED A TRAILER 10 MIT. AT THIS TIME, UGA X SAID, 'WHO WAS THAT?' I INFORMED UGA X I WAS NOT PAINTING ANY TFC. UGA X ADVISED ACFT 'JUST MISSED US.' I ASKED WHAT ALT THE TFC WAS. HE REPLIED ACFT WENT JUST BEHIND AND BELOW AS HE WAS PASSING 7100 FT MSL. I ASKED WHAT KIND OF ACFT, BUT HE DIDN'T GET A GOOD LOOK. HE STATED 'IT WAS REAL FAST.' 30 SECONDS AFTER NEAR MISS I PAINTED A PRIMARY TARGET FOR 3 UPDATES. TARGET WAS 5 MI OUTSIDE IR-721 AND FAST. I ASSUME IT WAS ONE OF THE 4 F- 15'S. IF IT WAS THE F-15 THAT WAS INVOLVED, HE WAS 15-20 MI OUTSIDE OF IR-721 AND 2000 FT HIGH AT TIME OF NMAC WITHOUT A FUNCTIONING XPONDER. MIL FLT RTE: GSB IR-721 GSB. TIME OF INCIDENT: APPROX XX00Z. THIS IS THE THIRD NMAC I'VE HAD IN ABOUT 8 YRS WORKING THIS AIRSPACE. ALL INVOLVED MIL ACFT POPPING UP FROM TERRAIN FOLLOWING RTES. 2 INCIDENTS INVOLVED NO XPONDER OPERATING.

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.