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Sfo controller questioned nct's use of visual separation between aircraft assigned staggered approaches when the official sfo weather was IFR. The reporter acknowledged that the weather on the final was VMC.
| Attributes | |
| ACN | 981778 |
| Time | |
| Date | 201111 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | SFO.Airport |
| State Reference | CA |
| Aircraft 1 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | Final Approach |
| Person 1 | |
| Function | Local |
| Qualification | Air Traffic Control Fully Certified |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Published Material / Policy |
Narrative:
Sfo weather was IFR. Nct advised us that they were utilizing staggered ILS approaches to runway 28L and 28R and would utilize visual separation to mitigate any IFR separation conflicts. Final approach course was cavu; but field was IFR. I am not aware of our facility being able to run staggered ILS approaches with 750 ft runway separation and visual to handle any in trail conflicts.this situation was a safe operation; but I am not aware of any rule in 7110.65 or LOA that approve this as a legal operation. Either make a local rule to approve this operation or do not do this. I thought you could not use visual separation on arrivals if the field weather was below basic and the aircraft were on ILS approaches.
Original NASA ASRS Text
Title: SFO Controller questioned NCT's use of visual separation between aircraft assigned staggered approaches when the official SFO weather was IFR. The reporter acknowledged that the weather on the final was VMC.
Narrative: SFO weather was IFR. NCT advised us that they were utilizing staggered ILS approaches to Runway 28L and 28R and would utilize visual separation to mitigate any IFR separation conflicts. Final approach course was CAVU; but field was IFR. I am not aware of our facility being able to run staggered ILS approaches with 750 FT runway separation and visual to handle any in trail conflicts.This situation was a safe operation; but I am not aware of any rule in 7110.65 or LOA that approve this as a legal operation. Either make a local rule to approve this operation or do not do this. I thought you could not use visual separation on arrivals if the field weather was below basic and the aircraft were on ILS approaches.
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.