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Regarding wake turbulence, what are the ICAO minimum radar separation distance and the minimum non-radar separation time for a MEDIUM aircraft behind a HEAVY aeroplane on approach to the same runway?
  • A
    9.3 km (5 NM) and 3 minutes
  • B
    11.1 km (6 NM) and 3 minutes
  • C
    7.4 km (4 NM) and 2 minutes
  • D
    9.3 km (5 NM) and 2 minutes

Refer to figures.
ICAO Doc 4444
5.8 TIME-BASED WAKE TURBULENCE LONGITUDINAL SEPARATION MINIMA
5.8.2 Arriving aircraft

5.8.2.1 Except as provided for in 5.8.1.1 a) and b), the following separation minima shall be applied.
5.8.2.1.1 The following minima shall be applied to aircraft landing behind a HEAVY or a MEDIUM aircraft:

a) MEDIUM aircraft behind HEAVY aircraft — 2 minutes;
b) LIGHT aircraft behind a HEAVY or MEDIUM aircraft — 3 minutes.

8.7.3 Separation minima based on ATS surveillance systems

8.7.3.4 The following distance-based wake turbulence separation minima shall be applied to aircraft being provided with an ATS surveillance service in the approach and departure phases of flight in the circumstances given in 8.7.3.4.1.

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