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An A11 TRACON controller reported that zan center had just handed off an arriving aircraft whose altitude indicated it was in confliction for the arrival. The TRACON could not detect a mode C.
| Attributes | |
| ACN | 1392468 |
| Time | |
| Date | 201610 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | A11.TRACON |
| State Reference | AK |
| Aircraft 1 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | Climb |
| Route In Use | None |
| Flight Plan | VFR |
| Person 1 | |
| Function | Approach |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 4.0 |
| Events | |
| Anomaly | ATC Issue All Types Conflict Airborne Conflict |
Narrative:
We had just started talking to aircraft X. There was an intermittent primary target ahead that we were about to issue to him when zan controller called asking if we saw the traffic climbing out of 9;600 feet becoming a factor for aircraft X. I immediately issued a traffic alert and turned aircraft X to resolve the conflict. The VFR aircraft must have had an ads-B transponder but no mode C transponder. Zan has ads-B capability; but we do not; therefore they were able to see the altitude and better track that target.A11 should get ads-B functionality enabled so that we can better see these aircraft and provide better and safer service to pilots.
Original NASA ASRS Text
Title: An A11 TRACON Controller reported that ZAN Center had just handed off an arriving aircraft whose altitude indicated it was in confliction for the arrival. The TRACON could not detect a Mode C.
Narrative: We had just started talking to Aircraft X. There was an intermittent primary target ahead that we were about to issue to him when ZAN controller called asking if we saw the traffic climbing out of 9;600 feet becoming a factor for Aircraft X. I immediately issued a traffic alert and turned Aircraft X to resolve the conflict. The VFR aircraft must have had an ADS-B transponder but no Mode C transponder. ZAN has ADS-B capability; but we do not; therefore they were able to see the altitude and better track that target.A11 should get ADS-B functionality enabled so that we can better see these aircraft and provide better and safer service to pilots.
Data retrieved from NASA's ASRS site 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.