Garmin G3X Pilots Guide - Page 203

Hazard Avoidance System Overview Flight Instruments EIS CNS Interface GPS Navigation Flight Planning Hazard Avoidance Additional Features METAR Legend METAR Selected With Map Pointer AIRMETS An AIRMET (AIRmen's METeorological Information) can be especially helpful for pilots of light aircraft that have limited flight capability or instrumentation. An AIRMET must affect or be forecast to affect an area of at least 3,000 square miles at any one time. AIRMETs are routinely issued for six-hour periods and are amended as necessary due to changing weather conditions. AIRMETs are displayed as colored, dashed lines. SIGMETS A SIGMET (SIGnificant METeorological Information) advises of weather that is potentially hazardous to all aircraft. In the contiguous United States, the following items are covered: severe icing, severe or extreme turbulence, volcanic ash, dust storms, and sandstorms that lower visibility to less than three statute miles. A Convective SIGMET is issued for the following conditions: thunderstorms, isolated severe thunderstorms, embedded thunderstorms, hail at the surface, and tornadoes. A SIGMET is widespread and must affect or be forecast to affect an area of at least 3,000 square miles. SIGMETs are displayed as a yellow-dashed line. AIRMET/SIGMET Legend AIRMET Selected With Map Pointer 190-01115-00 Rev. F Garmin G3X Pilot's Guide 185 Integrated Autopilot Annun/Alerts Appendix Index