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Which elements of instructions or information shall always be read back?
  • A
    Time check, runway-in-use, altimeter settings, level instructions, SSR codes.
  • B
    Runway-in-use, visibility, surface wind, heading instructions, altimeter settings.
  • C
    Runway-in-use, altimeter settings, SSR codes, level instructions, heading and speed instructions.
  • D
    Surface wind, visibility, ground temperature, runway-in-use, altimeter settings, heading and speed instructions.

ICAO Annex 11
3.7.3 Read-back of clearances and safety-related information

3.7.3.1 The flight crew shall read back to the air traffic controller safety-related parts of ATC clearances and instructions which are transmitted by voice. The following items shall always be read back:

a) ATC route clearances;
b) clearances and instructions to enter, land on, take off from, hold short of, cross and backtrack on any runway; and
c) runway-in-use, altimeter settings, SSR codes, level instructions, heading and speed instructions and, whether issued by the controller or contained in ATIS broadcasts, transition levels.

3.7.3.1.1 Other clearances or instructions, including conditional clearances, shall be read back or acknowledged in a manner to clearly indicate that they have been understood and will be complied with.

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