Narrative:

The reporting pilot was cleared for a straight-in to runway 24 at mht. At about a mile out, the controller cleared us to land runway 24. Again, at 1/2 mi he cleared us to land. Then he cleared an mdt Y for takeoff on runway 35. 24 intersects 35 at the departure end of 35. The mdt made a low trajectory takeoff. I could see that our paths of flight would conflict if I continued my approach to land. At that time -- 300 ft altitude MSL and 1/2 mi -- I told the controller, 'I am initiating a go around T avoid a midair.' the controller then gave me a telephone number to call the facility on landing. As I turned downwind for runway 35, as directed by the controller, I noted that the mdt crossed the intersection of 24/35 at 150 to 200 ft AGL, where I would have been had I continued my landing approach to 24. When on the ground, I called the number given by the controller. Meanwhile, my pilot passenger and I concurred that we would definitely have had a midair had we continued the landing phase of our flight. I spoke with the shift chief in the mht tower (the controller was busy with traffic).

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Original NASA ASRS Text

Title: SMA IS CLRED TO LAND, THEN CTLR CLRS ANOTHER ACFT OFF AN INTERSECTING RWY. LNDG ACFT GOES AROUND.

Narrative: THE RPTING PLT WAS CLRED FOR A STRAIGHT-IN TO RWY 24 AT MHT. AT ABOUT A MILE OUT, THE CTLR CLRED US TO LAND RWY 24. AGAIN, AT 1/2 MI HE CLRED US TO LAND. THEN HE CLRED AN MDT Y FOR TKOF ON RWY 35. 24 INTERSECTS 35 AT THE DEP END OF 35. THE MDT MADE A LOW TRAJECTORY TKOF. I COULD SEE THAT OUR PATHS OF FLT WOULD CONFLICT IF I CONTINUED MY APCH TO LAND. AT THAT TIME -- 300 FT ALT MSL AND 1/2 MI -- I TOLD THE CTLR, 'I AM INITIATING A GAR T AVOID A MIDAIR.' THE CTLR THEN GAVE ME A TELEPHONE NUMBER TO CALL THE FACILITY ON LNDG. AS I TURNED DOWNWIND FOR RWY 35, AS DIRECTED BY THE CTLR, I NOTED THAT THE MDT CROSSED THE INTXN OF 24/35 AT 150 TO 200 FT AGL, WHERE I WOULD HAVE BEEN HAD I CONTINUED MY LNDG APCH TO 24. WHEN ON THE GND, I CALLED THE NUMBER GIVEN BY THE CTLR. MEANWHILE, MY PLT PAX AND I CONCURRED THAT WE WOULD DEFINITELY HAVE HAD A MIDAIR HAD WE CONTINUED THE LNDG PHASE OF OUR FLT. I SPOKE WITH THE SHIFT CHIEF IN THE MHT TWR (THE CTLR WAS BUSY WITH TFC).

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.