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Refer to figure.
According to ICAO, which symbol indicates danger to an aircraft flying according to instrument flight rules (IFR)?

  • A

    Symbol 1

  • B

    Symbol 2

  • C

    Symbol 3

  • D

    Symbol 4

Refer to figure.
1) Snow
2) Widespread mist
3) Freezing precipitation
4) Widespread haze

Freezing precipitation = precipitation that contains supercooled water droplets, which can pose a significant hazard to the safety of flights as they tend to freeze immediately upon coming into contact with the aircraft, forming clear ice.

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