Track deviation air carrier medium large transport.

Attributes
ACN	92111
Time
Date	198807
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : hbk
State Reference	AK
Altitude	msl bound lower : 31000 msl bound upper : 31000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Route In Use	enroute airway : zan
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 7000 flight time type : 200
ASRS Report	92111
Person 2
Affiliation	government : faa
Function	controller : radar
Events
Anomaly	other spatial deviation
Independent Detector	other controllera
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

While cruising between killa intersection and hinchinbrook NDB on J133 en route to anc, anc center announced that we were 10 mi right of course and diverging. A close xchk of our navigation indicators revealed we might have been just slightly right of course, but not 10 mi. We adjusted course per center guidance, and then all of our new receivers showed us left of course (2 VOR's, 2 NDB's). I sincerely believe there was an error in center's radar map display vs actual arwy location, but the controller seemed equally convinced that her map display was correct.

Original NASA ASRS Text

Title: TRACK DEVIATION ACR MLG.

Narrative: WHILE CRUISING BETWEEN KILLA INTXN AND HINCHINBROOK NDB ON J133 ENRTE TO ANC, ANC CENTER ANNOUNCED THAT WE WERE 10 MI RIGHT OF COURSE AND DIVERGING. A CLOSE XCHK OF OUR NAV INDICATORS REVEALED WE MIGHT HAVE BEEN JUST SLIGHTLY RIGHT OF COURSE, BUT NOT 10 MI. WE ADJUSTED COURSE PER CENTER GUIDANCE, AND THEN ALL OF OUR NEW RECEIVERS SHOWED US LEFT OF COURSE (2 VOR'S, 2 NDB'S). I SINCERELY BELIEVE THERE WAS AN ERROR IN CENTER'S RADAR MAP DISPLAY VS ACTUAL ARWY LOCATION, BUT THE CTLR SEEMED EQUALLY CONVINCED THAT HER MAP DISPLAY WAS CORRECT.

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.