Reporter error admitted in transposing 1 digit during data entry into a C500 GPS system during an overwater operation in foreign airspace. Heading track position deviation in this navigation error.

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Attributes
ACN	352328
Time
Date	199611
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : birk
State Reference	FO
Altitude	msl bound lower : 26000 msl bound upper : 26000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : bird
Operator	general aviation : personal
Make Model Name	Citation I
Operating Under FAR Part	Part 91
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute : atlantic enroute : other oceanic enroute airway : bird
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 12000 flight time type : 200
ASRS Report	352328
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	non adherence : clearance other anomaly other other spatial deviation
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact other
Consequence	faa : investigated
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was proceeding to my first waypoint on a flight from rejeyvick, iceland (birk) to narsarsuaq, greenland (bgbw). After my first waypoint I was told that I was 30 mi off course at that point. I later discovered a programming error on my GPS. I had transposed 1 digit. ATC relayed that a gross navigation error was being filed. It appeared that I was radar contact at the time. I was not in mnps airspace nor was I mnps qualified.

Original NASA ASRS Text

Title: RPTR ERROR ADMITTED IN TRANSPOSING 1 DIGIT DURING DATA ENTRY INTO A C500 GPS SYS DURING AN OVERWATER OP IN FOREIGN AIRSPACE. HDG TRACK POS DEV IN THIS NAV ERROR.

Narrative: I WAS PROCEEDING TO MY FIRST WAYPOINT ON A FLT FROM REJEYVICK, ICELAND (BIRK) TO NARSARSUAQ, GREENLAND (BGBW). AFTER MY FIRST WAYPOINT I WAS TOLD THAT I WAS 30 MI OFF COURSE AT THAT POINT. I LATER DISCOVERED A PROGRAMMING ERROR ON MY GPS. I HAD TRANSPOSED 1 DIGIT. ATC RELAYED THAT A GROSS NAV ERROR WAS BEING FILED. IT APPEARED THAT I WAS RADAR CONTACT AT THE TIME. I WAS NOT IN MNPS AIRSPACE NOR WAS I MNPS QUALIFIED.

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.