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Visual separation used between small aircraft and fgt. See and avoid concept in arsa.
| Attributes | |
| ACN | 212550 |
| Time | |
| Date | 199206 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : oma |
| State Reference | NE |
| Altitude | msl bound lower : 3000 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : oma tower : oma tower : cmh |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Fixed Gear |
| Flight Phase | descent : approach |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Fighter |
| Flight Phase | descent : approach |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller radar : 11 |
| ASRS Report | 212550 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : non radar |
| Events | |
| Anomaly | conflict : airborne less severe |
| Independent Detector | other controllera |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Miss Distance | vertical : 1000 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Intra Facility Coordination Failure other |
Narrative:
I had an small aircraft on a 9 mi PAR final. I had an fgt inbound for initial to remain with the tower. Both aircraft were IFR. I coordinated with the tower to have the fgt enter initial at 4000 ft. This would keep the jet 1000 ft above the small aircraft. The tower (VFR only) approved this but I did not specifically ask them to give me visual separation with the fgt and the small aircraft. The fgt was sent to the tower having been informed of the traffic and instructed to maintain 4000 ft until initial. The next time I observed the traffic, the fgt was 3 mi in front of the small aircraft at 3500 ft. The small aircraft was at 2500 ft. This was good separation but I don't know if it was lost prior to this. The tower has BRITE with ARTS IIIA, and they did not mention the situation. I'm filing this report in case it is later determined that I did not have required separation. I will say again that, at the time I observed the situation, I did have separation. The best way to have alleviated the situation would have been to have tower specify that they would maintain visual and to have told the fgt to maintain 4000 ft until advised by the tower. I also could have vectored the fgt to follow the small aircraft. This would have been a lengthy delay for the fgt because of his high airspeed and the low speed of the small aircraft.
Original NASA ASRS Text
Title: VISUAL SEPARATION USED BTWN SMA AND FGT. SEE AND AVOID CONCEPT IN ARSA.
Narrative: I HAD AN SMA ON A 9 MI PAR FINAL. I HAD AN FGT INBOUND FOR INITIAL TO REMAIN WITH THE TWR. BOTH ACFT WERE IFR. I COORDINATED WITH THE TWR TO HAVE THE FGT ENTER INITIAL AT 4000 FT. THIS WOULD KEEP THE JET 1000 FT ABOVE THE SMA. THE TWR (VFR ONLY) APPROVED THIS BUT I DID NOT SPECIFICALLY ASK THEM TO GIVE ME VISUAL SEPARATION WITH THE FGT AND THE SMA. THE FGT WAS SENT TO THE TWR HAVING BEEN INFORMED OF THE TFC AND INSTRUCTED TO MAINTAIN 4000 FT UNTIL INITIAL. THE NEXT TIME I OBSERVED THE TFC, THE FGT WAS 3 MI IN FRONT OF THE SMA AT 3500 FT. THE SMA WAS AT 2500 FT. THIS WAS GOOD SEPARATION BUT I DON'T KNOW IF IT WAS LOST PRIOR TO THIS. THE TWR HAS BRITE WITH ARTS IIIA, AND THEY DID NOT MENTION THE SITUATION. I'M FILING THIS RPT IN CASE IT IS LATER DETERMINED THAT I DID NOT HAVE REQUIRED SEPARATION. I WILL SAY AGAIN THAT, AT THE TIME I OBSERVED THE SITUATION, I DID HAVE SEPARATION. THE BEST WAY TO HAVE ALLEVIATED THE SITUATION WOULD HAVE BEEN TO HAVE TWR SPECIFY THAT THEY WOULD MAINTAIN VISUAL AND TO HAVE TOLD THE FGT TO MAINTAIN 4000 FT UNTIL ADVISED BY THE TWR. I ALSO COULD HAVE VECTORED THE FGT TO FOLLOW THE SMA. THIS WOULD HAVE BEEN A LENGTHY DELAY FOR THE FGT BECAUSE OF HIS HIGH AIRSPD AND THE LOW SPD OF THE SMA.
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.