Narrative:

While inbound to galveston shoals field (gls) I began monitoring the unicom frequency 123.05 at 14 mi south of the field. I made an initial call at 10 mi, and again at 5 mi, stating my intention to enter the left downwind for runway 17 and landing to the parallel taxiway. At 2 mi south, I began looking and listening for traffic in the pattern. Airplane traffic was using runway 13 and the 2 aircraft using runway 13 had called full stop lndgs and taxiing clear. Seeing no aircraft in the pattern or on the runway, I entered a straight-in downwind which took me over the departure end of runway 13. I called entering the downwind and seconds later, I saw a katana about 100 ft below and about 100 ft at my 9 O'clock position. I believe we both saw each other at the same time and neither of us had taken evasive action. I heard no radio calls from the katana prior to his takeoff. To observe the airport I had to look xcockpit while continuing to scan to the right for other aircraft. I'm not sure the student pilot or instructor in the katana continued to clear for traffic in front of them by lowering the nose. Since I passed directly in front of the airplane this might have prevented the near miss.

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Original NASA ASRS Text

Title: NMAC BTWN AN ATX HELI DOWNWIND FOR LNDG, AND A DIAMOND KATANA ACFT CLBING OUT FROM AN INTERSECTING RWY WHICH THE RPTR WAS FLYING OVER ON DOWNWIND AT AN UNCTLED ARPT. THE RPTR HAD BEEN BROADCASTING OVER UNICOM HIS POS AND INTENTIONS, BUT HEARD NO CALLS FROM OTHER ACFT.

Narrative: WHILE INBOUND TO GALVESTON SHOALS FIELD (GLS) I BEGAN MONITORING THE UNICOM FREQ 123.05 AT 14 MI S OF THE FIELD. I MADE AN INITIAL CALL AT 10 MI, AND AGAIN AT 5 MI, STATING MY INTENTION TO ENTER THE L DOWNWIND FOR RWY 17 AND LNDG TO THE PARALLEL TXWY. AT 2 MI S, I BEGAN LOOKING AND LISTENING FOR TFC IN THE PATTERN. AIRPLANE TFC WAS USING RWY 13 AND THE 2 ACFT USING RWY 13 HAD CALLED FULL STOP LNDGS AND TAXIING CLR. SEEING NO ACFT IN THE PATTERN OR ON THE RWY, I ENTERED A STRAIGHT-IN DOWNWIND WHICH TOOK ME OVER THE DEP END OF RWY 13. I CALLED ENTERING THE DOWNWIND AND SECONDS LATER, I SAW A KATANA ABOUT 100 FT BELOW AND ABOUT 100 FT AT MY 9 O'CLOCK POS. I BELIEVE WE BOTH SAW EACH OTHER AT THE SAME TIME AND NEITHER OF US HAD TAKEN EVASIVE ACTION. I HEARD NO RADIO CALLS FROM THE KATANA PRIOR TO HIS TKOF. TO OBSERVE THE ARPT I HAD TO LOOK XCOCKPIT WHILE CONTINUING TO SCAN TO THE R FOR OTHER ACFT. I'M NOT SURE THE STUDENT PLT OR INSTRUCTOR IN THE KATANA CONTINUED TO CLR FOR TFC IN FRONT OF THEM BY LOWERING THE NOSE. SINCE I PASSED DIRECTLY IN FRONT OF THE AIRPLANE THIS MIGHT HAVE PREVENTED THE NEAR MISS.

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.