Garmin 010-00730-00 Manual De Usuario

XM WX Weather Features

An AIRMET or airman’s METeorological Information can potentially affect all aircraft. This data 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 or the issuance or cancellation of a SIGMET (Significant 

METeorological Forecast). AIRMETs are displayed as an colored, dashed line. 

AIRMET Sierra (IFR) (purple): Ceilings less than 1,000 feet and/or visibility less than three miles affecting over 50% of 

the area at one time. Extensive mountain obscuration.
AIRMET Tango 

(Turbulence) (orange): 

Moderate turbulence. 

Sustained surface winds 

of 30 knots or more at the 

surface.
AIRMET Zulu (Icing) 

(blue): Moderate icing. 

Freezing levels.

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