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Today's Terms
False Horizon
Definition:
When the only or most distinct visual reference is a cloud formation, it can be confused with the horizon or the ground. A sloping cloud deck that extends into a pilot's peripheral vision will appear to be horizontal.
SIGMET
Definition:
An in-flight weather advisory that is considered significant to all aircraft. SIGMET criteria include severe icing, severe and extreme turbulence, duststorms, sandstorms, volcanic eruptions, and volcanic ash that lower visibility to less than 3 miles.
ILS holding position sign
Definition:
ATC may hold you at this sign when the instrument landing system is being used at the airport.
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