Instrument Meteorological Conditions

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Link Semantic Value
Term Instrument Meteorological Conditions
Status


Mandatory for


Contexts


Categories
Synonyms


Related entries

Instrument Flight Rules

Broader term


Narrower term


Abbreviation

IMC

Definition

Meteorological conditions expressed in terms of visibility, distance from cloud, and ceiling, less than the minima specified for visual meteorological conditions.

Definition Source

ICAO (2007) Official definition modified by Amdt 16 to An 6/II (09/11/1995)

Note

Note 1.— [An 11] The specified minima for visual meteorological conditions are contained in Annex 2.

Note 2.— [PANS-ATM] In a control zone, a VFR flight may proceed under instrument meteorological conditions if and as authorized by air traffic control.