ATC intervened to question the flight crew of a B767 during departure SID, indicating that they had overshot their outbound VOR radial, and issued a new heading. However, reporter believes that their FMS map showed them centered on course.

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Attributes
ACN	360930
Time
Date	199702
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : oak
State Reference	CA
Altitude	msl bound lower : 2500 msl bound upper : 2500
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : oak tower : lns
Operator	common carrier : air carrier
Make Model Name	B767 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Route In Use	departure other departure sid : sid
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 70 flight time total : 4300 flight time type : 1200
ASRS Report	360930
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : published procedure non adherence : clearance other anomaly other other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

While complying with silent 7 departure, controller gave us a heading. He said it looked like you were going through radial. Our FMC map and raw data verification showed us centered on the SID radial.

Original NASA ASRS Text

Title: ATC INTERVENED TO QUESTION THE FLC OF A B767 DURING DEP SID, INDICATING THAT THEY HAD OVERSHOT THEIR OUTBOUND VOR RADIAL, AND ISSUED A NEW HEADING. HOWEVER, RPTR BELIEVES THAT THEIR FMS MAP SHOWED THEM CTRED ON COURSE.

Narrative: WHILE COMPLYING WITH SILENT 7 DEP, CTLR GAVE US A HEADING. HE SAID IT LOOKED LIKE YOU WERE GOING THROUGH RADIAL. OUR FMC MAP AND RAW DATA VERIFICATION SHOWED US CTRED ON THE SID RADIAL.

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.