Aviation Dictionary

Instrument meteorological conditions (IMC)

Meteorological conditions expressed in terms of visibility, distance from clouds, and ceiling less than the minimums specified for visual meteorological conditions, requiring operations to be conducted under IFR.

Dictionary Term

Instrument meteorological conditions (IMC)

Definition

Meteorological conditions expressed in terms of visibility, distance from clouds, and ceiling less than the minimums specified for visual meteorological conditions, requiring operations to be conducted under IFR.

References

Pilot's Handbook of Aeronautical Knowledge · Federal Aviation Administration · 2023