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In accordance with ICAO PANS OPS 8168, noise preferential routes are established to ensure that departing and arriving aeroplanes avoid overflying noise-sensitive areas in the vicinity of the aerodrome as far as practicable. In establishing noise preferential routes:
  • A
    no turns should be required coincident with a reduction of power associated with a noise abatement procedure.
  • B
    turns during take-off and climb should not be required unless the aeroplane has reached and can maintain throughout the turn a height of no less than 100 m above terrain and the highest obstacle.
  • C
    turns during take-off and climb should not be required unless the bank angle for turns is limited to 28° (climbing at V2 + 10 to 20 Kt).
  • D
    turns during take-off and climb should not be required unless the bank angle for turns is limited to 20° (climbing at V2 + 10 to 20 Kt).

ICAO Doc 8168
Chapter 2 NOISE PREFERENTIAL RUNWAYS AND ROUTES
2.2 NOISE PREFERENTIAL ROUTES

2.2.1 Noise preferential routes are established to ensure that departing and arriving aeroplanes avoid over-flying noise-sensitive areas in the vicinity of the aerodrome as far as practicable.

2.2.2 In establishing noise preferential routes:

a) turns during take-off and climb should not be required unless:

1) the aeroplane has reached (and can maintain throughout the turn) a height of not less than 150 m (500 ft) above terrain and the highest obstacles under the flight path;

Note.— PANS-OPS, Volume II, permits turns after take-off at 120 m (400 ft) and obstacle clearance of at least 90 m (300 ft) during the aeroplane’s turn. These are minimum requirements for noise abatement purposes.

2) the bank angle for turns after take-off is limited to 15° except where adequate provision is made for an acceleration phase permitting attainment of safe speeds for bank angles greater than 15°;

b) no turns should be required coincident with a reduction of power associated with a noise abatement procedure; and

c) sufficient navigation guidance should be provided to permit aeroplanes to adhere to the designated route.

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