3. Weather Requirements for Release IFR - 91.155, 121.611, 121.613,
121.619, 121.625
C. SkyWest Airlines will list a second alternate airport when the
destination and first alternate airport are marginal. SkyWest Airlines designates marginal to mean when the first alternate airport weather is forecasted to be at the lowest alternate minima authorized by the Operations Specifications for use at the intended airport.
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