Practice question

What is the primary function of a SIGMET advisory message issued by a Meteorological Watch Office (MWO) under ICAO Annex 3?

  1. To provide 7-day extended climate forecasts for airport construction planning
  2. To notify pilots and controllers of severe en-route weather phenomena hazardous to all aircraft
  3. To report routine hourly temperature and wind observations at local aerodromes
  4. To publish NOTAM closures for military danger areas

Answer: B — To notify pilots and controllers of severe en-route weather phenomena hazardous to all aircraft

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