Close proximity 2 GA small aircraft aircraft in traffic to pbf.

Attributes
ACN	127325
Time
Date	198910
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : pbf
State Reference	AR
Altitude	msl bound lower : 1100 msl bound upper : 1100
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft
Flight Phase	descent other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 40 flight time total : 1690 flight time type : 200
ASRS Report	127325
Person 2
Affiliation	Other
Function	flight crew : single pilot
Events
Anomaly	conflict : nmac non adherence : published procedure other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	horizontal : 0 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

From an IFR approach to grieder field, we switched to the unicom frequency to broadcast our position inbound. Shortly (a few seconds) later an aircraft nearly descended upon us. We evaded. The near miss was approximately 200'. Upon landing we learned that local traffic 'usually' (the word used by the FSS specialist) monitor 123.6, the FSS frequency, not 123.0, the unicom frequency. Looking at the chart again we saw the FSS box, so this was technically correct, but the confusion nevertheless creates a dangerous situation. Less than 10 seconds later on short final an agricultural aircraft crossed the active wry at about 50' and we experienced the second of 2 near misses of the entire 4000 mi trip. Apparently there is ag training on field adjacent to the runway and the pilots are casual about coming in at right angles and pulling out just over landing aircraft. Suggest more obvious way of depicting announce frequency.

Original NASA ASRS Text

Title: CLOSE PROX 2 GA SMA ACFT IN TRAFFIC TO PBF.

Narrative: FROM AN IFR APCH TO GRIEDER FIELD, WE SWITCHED TO THE UNICOM FREQ TO BROADCAST OUR POS INBND. SHORTLY (A FEW SECS) LATER AN ACFT NEARLY DSNDED UPON US. WE EVADED. THE NEAR MISS WAS APPROX 200'. UPON LNDG WE LEARNED THAT LCL TFC 'USUALLY' (THE WORD USED BY THE FSS SPECIALIST) MONITOR 123.6, THE FSS FREQ, NOT 123.0, THE UNICOM FREQ. LOOKING AT THE CHART AGAIN WE SAW THE FSS BOX, SO THIS WAS TECHNICALLY CORRECT, BUT THE CONFUSION NEVERTHELESS CREATES A DANGEROUS SITUATION. LESS THAN 10 SECS LATER ON SHORT FINAL AN AGRICULTURAL ACFT CROSSED THE ACTIVE WRY AT ABOUT 50' AND WE EXPERIENCED THE SECOND OF 2 NEAR MISSES OF THE ENTIRE 4000 MI TRIP. APPARENTLY THERE IS AG TRNING ON FIELD ADJACENT TO THE RWY AND THE PLTS ARE CASUAL ABOUT COMING IN AT RIGHT ANGLES AND PULLING OUT JUST OVER LNDG ACFT. SUGGEST MORE OBVIOUS WAY OF DEPICTING ANNOUNCE FREQ.

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.