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Controller says that the converging runway display aid for converging runways does not work correctly.
| Attributes | |
| ACN | 260006 |
| Time | |
| Date | 199312 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : stl |
| State Reference | MO |
| Altitude | agl bound lower : 500 agl bound upper : 1500 |
| Aircraft 1 | |
| Controlling Facilities | tracon : stl |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | descent : approach landing : go around |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller radar : 11 |
| ASRS Report | 260006 |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Navigational Facility |
| Air Traffic Incident | other |
| Situations | |
| Navigational Aid | Unspecified |
Narrative:
The enclosed management note was due to a problem we encountered while running runway 12R/06 converging runway display aid. Tower's ghost targets started drifting off course, all over the place. 6 consecutive gars were initiated. Callback conversation with reporter revealed the following: reporter said that the converging runway display aid (crda) has been at the facility for approximately 2 yrs, however, it was in the test mode most of that time. It appears that whenever the ARTS scatters, it affects the crda and must be turned off and on to regain this feature. Facility management thinks that the problem is in the national crda program and not within the facility. He's probably right. The problem still exists, but doesn't cause a lot of grief for the controllers. The crda provides a ghost target in between real targets for aircraft landing on converging runways. It allows the controller to better judge traffic and the sequencing of aircraft.
Original NASA ASRS Text
Title: CTLR SAYS THAT THE CONVERGING RWY DISPLAY AID FOR CONVERGING RWYS DOES NOT WORK CORRECTLY.
Narrative: THE ENCLOSED MGMNT NOTE WAS DUE TO A PROB WE ENCOUNTERED WHILE RUNNING RWY 12R/06 CONVERGING RWY DISPLAY AID. TWR'S GHOST TARGETS STARTED DRIFTING OFF COURSE, ALL OVER THE PLACE. 6 CONSECUTIVE GARS WERE INITIATED. CALLBACK CONVERSATION WITH REPORTER REVEALED THE FOLLOWING: RPTR SAID THAT THE CONVERGING RWY DISPLAY AID (CRDA) HAS BEEN AT THE FACILITY FOR APPROX 2 YRS, HOWEVER, IT WAS IN THE TEST MODE MOST OF THAT TIME. IT APPEARS THAT WHENEVER THE ARTS SCATTERS, IT AFFECTS THE CRDA AND MUST BE TURNED OFF AND ON TO REGAIN THIS FEATURE. FACILITY MGMNT THINKS THAT THE PROB IS IN THE NATIONAL CRDA PROGRAM AND NOT WITHIN THE FACILITY. HE'S PROBABLY RIGHT. THE PROB STILL EXISTS, BUT DOESN'T CAUSE A LOT OF GRIEF FOR THE CTLRS. THE CRDA PROVIDES A GHOST TARGET IN BTWN REAL TARGETS FOR ACFT LNDG ON CONVERGING RWYS. IT ALLOWS THE CTLR TO BETTER JUDGE TFC AND THE SEQUENCING OF ACFT.
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.