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Air carrier captain reports confusion departing rjaa to the north on the tetra 1 RNAV. Tetra and trika are similar sounding fix names on this SID and a clearance direct trika; although repeated twice sounded like tetra and resulted in a track deviation.
| Attributes | |
| ACN | 924649 |
| Time | |
| Date | 201012 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | RJAA.TRACON |
| State Reference | FO |
| Aircraft 1 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Climb |
| Route In Use | SID TETRA 1 |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 180 Flight Crew Total 23000 Flight Crew Type 2300 |
| Events | |
| Anomaly | Deviation - Procedural Clearance Deviation - Track / Heading All Types |
Narrative:
On climb out on the tetra 1 departure. We were being radar vectored. Departure then cleared us direct to tetra. Due to the controller's broken english I asked twice to confirm the clearance. Both times were confirmed. Five minutes later another controller mentioned that we were off course. It was apparent that the prior controller meant to clear us to trika another fix on the departure instead of tetra. It is unfortunate that there are two similar sounding fixes on this departure; lending problems with at times broken english. There was no other aircraft observed in our vicinity during this.
Original NASA ASRS Text
Title: Air Carrier Captain reports confusion departing RJAA to the north on the TETRA 1 RNAV. TETRA and TRIKA are similar sounding fix names on this SID and a clearance direct TRIKA; although repeated twice sounded like TETRA and resulted in a track deviation.
Narrative: On climb out on the TETRA 1 departure. We were being radar vectored. Departure then cleared us direct to TETRA. Due to the Controller's broken English I asked twice to confirm the clearance. Both times were confirmed. Five minutes later another Controller mentioned that we were off course. It was apparent that the prior Controller meant to clear us to TRIKA another fix on the departure instead of TETRA. It is unfortunate that there are two similar sounding fixes on this departure; lending problems with at times broken English. There was no other aircraft observed in our vicinity during this.
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.