NMAC AT NON TWR ARPT.

Narrative

DEPARTED BOSTON ON IFR FLT PLAN. FLT WAS A LINE CHK FOR CAPT (SELF) CHK AIRMAN WAS OBSERVING FLT. PNF WAS COPLT; WOMANNING THE RADIOS. BRUNSWICK APCH ADVISED TARGET IN VICINITY OF AUGUSTA ARPT AND SWITCHED US OVER TO LCL FREQ. WE HAD FIELD IN SIGHT SO CANCELLED IFR. I HAD 'PNF' BROADCAST INTENTIONS TO 10 MI OUT; 5 MI OUT AND TURNING FINAL. (AUGUSTA AREA TFC ACR X; 10 MI SW INBOUND FOR L BASE ENTRY RWY 35 AUGUSTA; ANY TFC PLEASE ADVISE.) AN SMA REPLIED HE WAS IN PATTERN BUT GAVE POOR OR ERRONEOUS POS RPTS IN PATTERN. THIS SHOULD HAVE CLUED US IN. WE SPOTTED THE ACFT ON DOWNWIND. WE BROADCAST 2 POS RPTS ON FINAL. SMA ON DOWNWIND DRIFTED TOWARD US AND HE TURNED BASE AT OUR 10 O'CLOCK POS. THE PROJECTED COURSE WOULD HAVE PUT HIM RIGHT ON TOP OF US. 'PNF' INTERJECTED 'SMA Y IN AUGUSTA; ACR X IS ON FINAL; DO YOU HAVE US IN SIGHT.' HE REPLIED 'I JUST PICKED YOU UP; I'M GOING AROUND.' WE LANDED UNEVENTFULLY. ON TAXI BACK TO RAMP; SPOTTED A PERSON SITTING ON LAWN CHAIR NEXT TO RWY. THINGS SEEMED TO FIT TOGETHER THEN. POOR RADIO COM FROM A SUPERVISED SOLO PLT. CFI ON RWY EDGE WATCHING STUDENT. ENOUGH NARRATIVE -- POOR POS RPTING OR UNSURE POS RPTING IN THE PATTERN SHOULD HAVE CLUED US IN. ALTHOUGH WE BOTH WERE RPTING NON CONFLICTING POS IN THE PATTERN; I DID NOT ASK OTHER ACFT IF HE HAD US IN SIGHT. AUGUSTA IS UNCTLED WITH BOTH 135 SCHEDULED OPS AND FLT TRAINING TAKING PLACE THERE. IN THE FUTURE I WILL REQUEST OTHER ACFT IN THE PATTERN TO ADVISE THAT WE ARE IN SIGHT.