At 30 DME, the steps change from 8,500 ft/7,500 ft to 4,500 ft. Use good visual references to allow a healthy buffer for a planned descent to remain OCTA. If requesting a clearance, allow plenty of time before the step and always have an alternative plan, including a suitable decision point.
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Airspace infringement hotspot inbound at the 30 nm DME step
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Airspace infringement hotspot Sunbury-Romsey Area
The IFR arrival into Melbourne comes close to the CTA base in this area. Leave yourself a buffer underneath the step. Most of the area under the C LL 1,500 ft step north of Melbourne is not practically navigable OCTA – stay well away. Remain north and west of the high ground near the Sunbury water tanks and clear of the Penfield and Riddell aerodromes.
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Airspace infringement hotspot Melbourne CTR – Tullamarine and Essendon
Familiarise yourself with airspace around where you are flying. Confirm where you will need a clearance. Request your clearance well before reaching the CTA step. Ensure current published aeronautical charts are used and monitor the correct frequency.
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Airspace infringement hotspot – step boundaries near Yan Yean
With 3 different CTA lower levels in close proximity, use Yan Yean Reservoir as a landmark to determine which quadrant you are in.
