Narrative:

I was approaching tix to land. I reported to the tower 10 northwest. The tower advised me of aircraft Y traffic to land on 180 and instructed me to call on a 3 mi right base. The aircraft Y pilot reported a 3 mi final for 18 as my LORAN showed me to be 7 northwest. I advised the tower I was showing 7 northwest. I continued approaching the airport at 1000 ft on a wide right base and watching for the aircraft Y which had reported a 1 1/2 mi final. I remained at 1000 ft because I did not have visual contact. As I approached the point at which I should turn final 3 mi out I asked the tower for spacing information. No traffic was visible on a 1 1/2 mi final. The tower told me not to turn final and I continued east at 1000 ft. I heard the aircraft Y pilot report that I had cut him off. I was 3 mi north of the threshold for 18 at 1000 ft and was looking for traffic which had reported a 1 1/2 final. The tower cleared me to make a left turn and reenter final. As I again started to turn south, the aircraft Y was then on about a 1 1/2 mi final. Contributing factors were: my aircraft had been reported in sight by the tower and I may have had the impression that positions were being monitored. The aircraft Y pilot may have had the same impression. The pilot of the aircraft Y spoke broken english. His initial contact with the tower had reported 4000 ft over the field for landing. The tower had lengthy conversation with him to make him understand that he could enter either a right or left downwind for 18. He finally reported again north of the airport and was cleared straight in to 18. At that time I reported my LORAN reading of 7 northwest of the 18 threshold to the tower which told me I was in sight. The aircraft Y had reported a 3 mi final and my attention was on that area. More accurate position awareness and correct position reports can correct this type problem.

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Original NASA ASRS Text

Title: CORP ACFT HAS NMAC WITH SMA ON APCH WHICH GAVE WRONG POS.

Narrative: I WAS APCHING TIX TO LAND. I RPTED TO THE TWR 10 NW. THE TWR ADVISED ME OF ACFT Y TFC TO LAND ON 180 AND INSTRUCTED ME TO CALL ON A 3 MI R BASE. THE ACFT Y PLT RPTED A 3 MI FINAL FOR 18 AS MY LORAN SHOWED ME TO BE 7 NW. I ADVISED THE TWR I WAS SHOWING 7 NW. I CONTINUED APCHING THE ARPT AT 1000 FT ON A WIDE R BASE AND WATCHING FOR THE ACFT Y WHICH HAD RPTED A 1 1/2 MI FINAL. I REMAINED AT 1000 FT BECAUSE I DID NOT HAVE VISUAL CONTACT. AS I APCHED THE POINT AT WHICH I SHOULD TURN FINAL 3 MI OUT I ASKED THE TWR FOR SPACING INFO. NO TFC WAS VISIBLE ON A 1 1/2 MI FINAL. THE TWR TOLD ME NOT TO TURN FINAL AND I CONTINUED E AT 1000 FT. I HEARD THE ACFT Y PLT RPT THAT I HAD CUT HIM OFF. I WAS 3 MI N OF THE THRESHOLD FOR 18 AT 1000 FT AND WAS LOOKING FOR TFC WHICH HAD RPTED A 1 1/2 FINAL. THE TWR CLRED ME TO MAKE A L TURN AND REENTER FINAL. AS I AGAIN STARTED TO TURN S, THE ACFT Y WAS THEN ON ABOUT A 1 1/2 MI FINAL. CONTRIBUTING FACTORS WERE: MY ACFT HAD BEEN RPTED IN SIGHT BY THE TWR AND I MAY HAVE HAD THE IMPRESSION THAT POSITIONS WERE BEING MONITORED. THE ACFT Y PLT MAY HAVE HAD THE SAME IMPRESSION. THE PLT OF THE ACFT Y SPOKE BROKEN ENGLISH. HIS INITIAL CONTACT WITH THE TWR HAD RPTED 4000 FT OVER THE FIELD FOR LNDG. THE TWR HAD LENGTHY CONVERSATION WITH HIM TO MAKE HIM UNDERSTAND THAT HE COULD ENTER EITHER A R OR L DOWNWIND FOR 18. HE FINALLY RPTED AGAIN N OF THE ARPT AND WAS CLRED STRAIGHT IN TO 18. AT THAT TIME I RPTED MY LORAN READING OF 7 NW OF THE 18 THRESHOLD TO THE TWR WHICH TOLD ME I WAS IN SIGHT. THE ACFT Y HAD RPTED A 3 MI FINAL AND MY ATTN WAS ON THAT AREA. MORE ACCURATE POS AWARENESS AND CORRECT POS RPTS CAN CORRECT THIS TYPE PROBLEM.

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.