Which advisory is issued for significant meteorological information affecting all aircraft?

Which advisory is issued for significant meteorological information affecting all aircraft?

• A. A routine airport weather observation.
• B. Weather forecast for the next 12 hours.
• C. Significant Meteorological Information; advisory for weather conditions affecting all aircraft.
• D. Pilot weather briefing.

Answer: (C)

Significant Meteorological Information (SIGMET) is the advisory issued when weather conditions may affect the safety of all aircraft in flight within a region. It’s a broad warning broadcast to airspace users, not tied to a single airport or a routine forecast for one location. SIGMETs cover hazards like severe icing, severe turbulence, volcanic ash, dust storms, and active thunderstorms. This makes SIGMET the appropriate choice compared to METARs (routine airport observations), forecasts for specific airports (like a 12-hour forecast), or a pilot weather briefing (a personal planning briefing).

Significant Meteorological Information (SIGMET) is the advisory issued when weather conditions may affect the safety of all aircraft in flight within a region. It’s a broad warning broadcast to airspace users, not tied to a single airport or a routine forecast for one location. SIGMETs cover hazards like severe icing, severe turbulence, volcanic ash, dust storms, and active thunderstorms. This makes SIGMET the appropriate choice compared to METARs (routine airport observations), forecasts for specific airports (like a 12-hour forecast), or a pilot weather briefing (a personal planning briefing).