Mlt on TACAN approach took evasive action to avoid small aircraft crossing final approach course.

Attributes
ACN	96007
Time
Date	198810
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : nuq
State Reference	CA
Altitude	msl bound lower : 1500 msl bound upper : 1700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : nuq
Operator	other
Make Model Name	Military Transport
Flight Phase	descent : approach descent other
Route In Use	arrival other
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	cruise other
Flight Plan	None
Person 1
Affiliation	government : military
Function	flight crew : captain oversight : pic
Qualification	pilot : military
Experience	flight time last 90 days : 300 flight time total : 5000
ASRS Report	96007
Person 2
Affiliation	government : military
Function	flight crew : first officer
Qualification	pilot : military
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 500 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

Mlt X on TACAN 32 approach avoided collision with a traffic watch aircraft, small aircraft Y, who was at the final approach fix for the TACAN maneuvering along the freeway. We were not advised of any traffic in the vicinity from ATC. Small aircraft Y was not monitoring our frequency, ie, nuq tower. Aircraft tail # was idented by audio tapes from the moffett tower. Small aircraft Y had transitioned moffett airspace and switched to sjc tower before we had established communications with moffett tower.

Original NASA ASRS Text

Title: MLT ON TACAN APCH TOOK EVASIVE ACTION TO AVOID SMA CROSSING FINAL APCH COURSE.

Narrative: MLT X ON TACAN 32 APCH AVOIDED COLLISION WITH A TFC WATCH ACFT, SMA Y, WHO WAS AT THE FINAL APCH FIX FOR THE TACAN MANEUVERING ALONG THE FREEWAY. WE WERE NOT ADVISED OF ANY TFC IN THE VICINITY FROM ATC. SMA Y WAS NOT MONITORING OUR FREQ, IE, NUQ TWR. ACFT TAIL # WAS IDENTED BY AUDIO TAPES FROM THE MOFFETT TWR. SMA Y HAD TRANSITIONED MOFFETT AIRSPACE AND SWITCHED TO SJC TWR BEFORE WE HAD ESTABLISHED COMS WITH MOFFETT TWR.

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.