Narrative:

On departure from O18 I advised traffic of my intentions on published CTAF. At approximately 500' MSL at about 2/3 down runway 32 (departure runway) I commenced my turn to crosswind leg to comply with locally mandated, published noise abatement procedures. On crosswind leg at approximately 800' MSL I observed another aircraft slightly higher crossing in front of me from right to left. I deviated slightly to my left (less than 5 degrees) to fly behind aircraft's path which appeared to be the downwind leg of the traffic pattern of runway 32 O18. The other aircraft appeared, however to be substantially lower and closer in to the airport than the standard traffic pattern. Immediately upon crossing behind this aircraft, I noticed another aircraft approximately 100' below me and somewhat behind me. At this time, I was approaching 1000' MSL, still on my crosswind leg. I was advised by the operator of that aircraft that on my climb I had crossed in front of his flight path. I observed that if what he was saying was correct, I would have approached his flight path from below and to his right. I had not seen him prior to the point when I was above and in front of his flight path, because I was watching the first aircraft carefully to fly behind its path. In future, pilots departing hanford pursuant to the noise abatement procedures should be aware that others using the airport may not be aware of its standard patterns. The other pilot did not appear to understand the right of way rules prescribed by the far's.

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Original NASA ASRS Text

Title: CLOSE PROX GA-SMA GA-SMA AT NON TWR ARPT USING CTAF.

Narrative: ON DEP FROM O18 I ADVISED TFC OF MY INTENTIONS ON PUBLISHED CTAF. AT APPROX 500' MSL AT ABOUT 2/3 DOWN RWY 32 (DEP RWY) I COMMENCED MY TURN TO XWIND LEG TO COMPLY WITH LOCALLY MANDATED, PUBLISHED NOISE ABATEMENT PROCS. ON XWIND LEG AT APPROX 800' MSL I OBSERVED ANOTHER ACFT SLIGHTLY HIGHER XING IN FRONT OF ME FROM RIGHT TO LEFT. I DEVIATED SLIGHTLY TO MY LEFT (LESS THAN 5 DEGS) TO FLY BEHIND ACFT'S PATH WHICH APPEARED TO BE THE DOWNWIND LEG OF THE TFC PATTERN OF RWY 32 O18. THE OTHER ACFT APPEARED, HOWEVER TO BE SUBSTANTIALLY LOWER AND CLOSER IN TO THE ARPT THAN THE STANDARD TFC PATTERN. IMMEDIATELY UPON XING BEHIND THIS ACFT, I NOTICED ANOTHER ACFT APPROX 100' BELOW ME AND SOMEWHAT BEHIND ME. AT THIS TIME, I WAS APCHING 1000' MSL, STILL ON MY XWIND LEG. I WAS ADVISED BY THE OPERATOR OF THAT ACFT THAT ON MY CLB I HAD CROSSED IN FRONT OF HIS FLT PATH. I OBSERVED THAT IF WHAT HE WAS SAYING WAS CORRECT, I WOULD HAVE APCHED HIS FLT PATH FROM BELOW AND TO HIS RIGHT. I HAD NOT SEEN HIM PRIOR TO THE POINT WHEN I WAS ABOVE AND IN FRONT OF HIS FLT PATH, BECAUSE I WAS WATCHING THE FIRST ACFT CAREFULLY TO FLY BEHIND ITS PATH. IN FUTURE, PLTS DEPARTING HANFORD PURSUANT TO THE NOISE ABATEMENT PROCS SHOULD BE AWARE THAT OTHERS USING THE ARPT MAY NOT BE AWARE OF ITS STANDARD PATTERNS. THE OTHER PLT DID NOT APPEAR TO UNDERSTAND THE RIGHT OF WAY RULES PRESCRIBED BY THE FAR'S.

Data retrieved from NASA's ASRS site as of August 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.