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Green Operations: Canberra
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| | | | Problem
Canberra YSCB has significant noise abatement and other airspace restrictions. The existing VOR approach to RW17 has high minima, and for the final 4.1 nm provides a visual segment with no obstacle protection. The ILS to RW35 requires a 4.6% climb on missed approach to achieve the lowest minima. Existing departures carried a significant penalty in available payload. Runway improvements in 2006 required a temporary displacement of the runway threshold. This put the ILS glideslope out of service on RW35, increasing the DA(H) to 700' during construction.
| | Solution
Naverus and Qantas worked with Canberra ATC to thread RNP procedures through the existing airspace constraints. Using RNP, Naverus reduced the DA(H) minima to RW17 to 250' (a 1126' improvement) and provides full lateral and vertical guidance throughout the procedure. On RW35, the RNP approach provides an alternative to the ILS at comparable DA(H) and with a missed approach that accommodates engine-out.
During the runway improvement project, Naverus provided a modified approach to RW35 that compensated for the temporarily displaced threshold. This allowed Qantas to continue using that RW35 at the lower DA throughout the ILS service outage. Naverus also redesigned the Engine-Out segments of Qantas' departures at Canberra, resulting in an average of 11,000 pounds of additional payload capacity.
| | Significant Obstacles: - Large noise abatement areas
- Military airspace restrictions
- Terrain obstacles in critical locations
| | Technical Details:
Elevation: 1886 feet/575 meters
Coordinates: 35° 18'25" S, 149° 11'42”E
DA(H) for RWY17:
before: VOR/NDB 1376' HAT
after: RNP 0.1 250' HAT (1126' improvement)
DA(H) for RWY35:
before: ILS 230'HAT w/ 4.6% climb in missed approach
after: RNP 0.1 441' HAT w/ engine-out missed approach
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