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According to ICAO Doc. 4444, describe what actions a pilot shall make after receiving a broadcast about another aircraft's emergency descent.
  • A
    Navigate as deemed appropriate by the pilot and acknowledge to the appropriate ATS unit that the notification about the emergency descent was received.
  • B

    Immediately acknowledge the receipt of the broadcast and request further instructions.

  • C
    Continue according to current clearance and maintain a listening watch on the frequency in use for any further instructions from the ATS unit, and watch for conflicting traffic both visually and by reference to ACAS (if equipped).
  • D
    Navigate as deemed appropriate by the pilot and turn on all aircraft exterior lights (commensurate with appropriate operating limitations).
Learning Objective 010.07.02.19.03: Describe the expected action of aircraft after receiving a broadcast from ATS concerning the emergency descent of an aircraft.
Source: ICAO Doc 4444, Chapter 15, 15.1.4 Emergency descent

ICAO Doc. 4444 (PANS-ATM)
15.1.4.3 ACTION BY THE PILOT OF THE AIRCRAFT RECEIVING EMERGENCY DESCENT BROADCAST

Unless specifically instructed by the ATS unit to clear the area or threatened by immediate danger, the pilot shall take the following actions:

a) continue according to current clearance and maintain listening watch on the frequency in use for any further instructions from the ATS unit; and
b) watch for conflicting traffic both visually and by reference to ACAS (if equipped).

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