Practice question

What is the difference in scope between an AIRMET and a SIGMET advisory?

  1. AIRMET describes specified en-route phenomena significant to low-level operations that are not already included in the low-level forecast; SIGMET describes specified phenomena that may affect the safety of aircraft operations more generally.
  2. AIRMET is issued only for military aircraft; SIGMET is for commercial airlines.
  3. AIRMET covers ground baggage handling; SIGMET covers passenger boarding.
  4. There is no difference; AIRMET and SIGMET are identical.

Answer: A — AIRMET describes specified en-route phenomena significant to low-level operations that are not already included in the low-level forecast; SIGMET describes specified phenomena that may affect the safety of aircraft operations more generally.

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