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A B767-300 in class ii navigation deviated from their assigned course when they misinterpreted a waypoint designation.
| Attributes | |
| ACN | 842623 |
| Time | |
| Date | 200907 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | CZQX.ARTCC |
| State Reference | NF |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Route In Use | Other Controlled |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain |
| Experience | Flight Crew Last 90 Days 150 Flight Crew Total 12500 Flight Crew Type 400 |
| Person 2 | |
| Experience | Flight Crew Last 90 Days 120 Flight Crew Type 3039 |
| Events | |
| Anomaly | Deviation - Procedural Clearance Deviation - Track / Heading All Types |
Narrative:
Gander asked if we were deviating for weather; as he showed us a little off course. He then cleared us direct ronpo. We later figured out that per our filed and cleared route was direct to N4430 W06000. This fix was entered 4460N as it was shown on our release; but the lat & long and the entered fix was different. Normally this would be caught and fixed when we underline and circle the fixes on the over water portion of our flight plan; but this fix was prior to our coast out point. Lessons learned - if it's a lat/long check the lat/long (navdata) even if it's not on an overwater segment. Better yet; change the syntax for abbreviated fix notation on the flight release (N4460) for those fixes that contain half-degree waypoints (N4430 W06000).
Original NASA ASRS Text
Title: A B767-300 in Class II navigation deviated from their assigned course when they misinterpreted a waypoint designation.
Narrative: Gander asked if we were deviating for weather; as he showed us a little off course. He then cleared us direct RONPO. We later figured out that per our filed and cleared route was direct to N4430 W06000. This fix was entered 4460N as it was shown on our release; but the lat & long and the entered fix was different. Normally this would be caught and fixed when we underline and circle the fixes on the over water portion of our flight plan; but this fix was prior to our coast out point. Lessons learned - If it's a lat/long check the lat/long (NAVDATA) even if it's not on an overwater segment. Better yet; change the syntax for abbreviated fix notation on the flight release (N4460) for those fixes that contain half-degree waypoints (N4430 W06000).
Data retrieved from NASA's ASRS site as of April 2012 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.