An aircraft is approaching runway 12 with the intention of circling to runway 30 in class A airspace. What is the appropriate magnetic heading to initiate the circling manoeuvre?
Refer to figure.
ICAO Doc 8168
6.5.2 Standard track (general case)
6.5.2.1 Figure II-5-6-3 shows a standard track general case.
6.5.2.2 The direction and the length of each segment are defined. If a speed restriction is prescribed, it is published on the chart.
The figure of the standard track for general use shows a deviation of 45° to enter the downwind leg of the visual manoeuvring (circling). In the given example, the aircraft is approaching runway 12, circling to 30. This means that the pilot should follow a track of 120° + 45° = 165° approximately (the exact runway direction is not given in degrees magnetic). Consequently, the choice 158° is the most relevant.
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