Deviated from assigned course over ocean.

Attributes
ACN	88964
Time
Date	198806
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : eggx
State Reference	FO
Altitude	msl bound lower : 18000 msl bound upper : 18000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : eggx
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Retractable Gear
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 180 flight time total : 9400 flight time type : 35
ASRS Report	88964
Person 2
Affiliation	government other
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : less severe non adherence : clearance other anomaly other other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance flight crew : overcame equipment problem flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

I am enclosing a copy of a letter I wrote to one of the controling agencies involved. Also enclosed is a copy of the message I received after landing. My intended position should have been 53/30N-20W. As is seen here, radar observed us 57/30N 12/30W. Callback conversation with reporter revealed the following: long distance with continued error may have created as much as 300 mi course deviation. Shanwick controllers indicated violation would be filed. Has heard nothing to date. Pilot feels his 18000' altitude helped scottish center pick him up quite some distance out and vector back on course. Fortunately he had plenty of fuel.

Original NASA ASRS Text

Title: DEVIATED FROM ASSIGNED COURSE OVER OCEAN.

Narrative: I AM ENCLOSING A COPY OF A LETTER I WROTE TO ONE OF THE CTLING AGENCIES INVOLVED. ALSO ENCLOSED IS A COPY OF THE MESSAGE I RECEIVED AFTER LNDG. MY INTENDED POS SHOULD HAVE BEEN 53/30N-20W. AS IS SEEN HERE, RADAR OBSERVED US 57/30N 12/30W. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: LONG DISTANCE WITH CONTINUED ERROR MAY HAVE CREATED AS MUCH AS 300 MI COURSE DEVIATION. SHANWICK CTLRS INDICATED VIOLATION WOULD BE FILED. HAS HEARD NOTHING TO DATE. PLT FEELS HIS 18000' ALT HELPED SCOTTISH CENTER PICK HIM UP QUITE SOME DISTANCE OUT AND VECTOR BACK ON COURSE. FORTUNATELY HE HAD PLENTY OF FUEL.

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.