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An IFR flight in IMC conditions is being radar vectored when the aircraft experiences radio communication failure. Taking into consideration the applicable minimum flight altitude, the PIC should…

  • A
    proceed in the most direct manner possible to rejoin the flight plan route no later than the next significant point.
  • B

    maintain the last assigned heading for a period of 7 minutes, and then adjust in accordance with the flight plan.

  • C
    maintain the last assigned heading for a period of 20 minutes, and then adjust in accordance with the flight plan.
  • D
    climb to the Minimum Sector Altitude and hold for a period of 7 minutes, and then rejoin the flight plan route.

ICAO Doc 4444
15.3 AIR-GROUND COMMUNICATIONS FAILURE

15.3.3 If the aircraft fails to indicate that it is able to receive and acknowledge transmissions, separation shall be maintained between the aircraft having the communication failure and other aircraft, based on the assumption that the aircraft will: (...)

3) when being vectored or having been directed by ATC to proceed offset using RNAV without a specified limit, proceed in the most direct manner possible to rejoin the current flight plan route no later than the next significant point, taking into consideration the applicable minimum flight altitude.

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