Instrument Meteorological Conditions

Meteorological conditions expressed in terms of visibility, distance from clouds, and ceiling less than minima specified for visual meteorological conditions. These are the conditions specified for Instrument Flight rules (IFR) -

Conditions for fixed wing aircraft - the minimum cloud ceiling is greater than 500 feet and less than 1,000 feet and/or visibility is greater than 1 mile and less than 3 miles.

Concept Mapping Toolkit
Insitute for Human and Machine Cognition
The University of West Florida