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On an NDB approach, an aircraft is using QFE. ATC will inform the pilot that the vertical position of the aircraft will be expressed in terms of height above the runway threshold elevation when…

  • A
    The threshold is 35 ft or more below the aerodrome elevation.
  • B
    The threshold is 17 ft or more below the aerodrome elevation.
  • C
    The threshold is 15 ft or more below the aerodrome elevation.
  • D
    The threshold is 7 ft or more below the aerodrome elevation.

ICAO Doc 4444
4.10 ALTIMETER SETTING PROCEDURES

4.10.1 Expression of vertical position of aircraft

4.10.1.2 When an aircraft which has been given clearance to land is completing its approach using atmospheric pressure at aerodrome elevation (QFE), the vertical position of the aircraft shall be expressed in terms of height above aerodrome elevation during that portion of its flight for which QFE may be used, except that it shall be expressed in terms of height above runway threshold elevation:

a) for instrument runways, if the threshold is 2 m (7 ft) or more below the aerodrome elevation; and
b) for precision approach runways.

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