Instrument Rating Exam · Practice

A SIGMET is issued when:

• A.Fog is forecast at the destination aerodrome at any time in the TAF validity
• B.Meteorological conditions exist that may affect the safety of aircraft operations
• C.A routine METAR fails to arrive on schedule and a SPECI must be substituted
• D.The surface wind speed at an aerodrome exceeds 15 kt for more than one hour