IMC

Weather

Instrument meteorological conditions

Weather below the VMC minima: in cloud, in poor visibility, or too close to cloud to fly by outside references. Flying in IMC means flying under IFR, which needs an instrument rating.

For a VFR pilot, flying into IMC by accident is one of the biggest risks in general aviation, because spatial disorientation can set in within minutes. Turn back early, while you can still see.

Also known as

instrument meteorological conditions

See also

VMC IFR ILS Minimums

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