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A turning departure is one in which a departure route requires a turn of more than:
  • A
    10º
  • B
    15º
  • C
    20º
  • D
    30º

ICAO Doc 8168

2.2 STRAIGHT DEPARTURES
2.2.1.1 A straight departure is one in which the initial departure track is within 15° of the alignment of the runway centre line.

2.3 TURNING DEPARTURES
2.3.1 When a departure route requires a turn of more than 15°, it is called a turning departure. Straight flight is assumed until reaching an altitude/height of at least 120 m (394 ft), or 90 m (295 ft) for helicopters. Procedures normally cater for turns at a point 600 m from the beginning of the runway. However, in some cases turns may not be initiated before the DER (or a specified point), and this information will be noted on the departure chart.

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