What does "IMC" stand for in aviation?

In aviation, "IMC" stands for Instrument Meteorological Conditions. This term refers to weather conditions in which pilots must rely on instruments for navigation and control of the aircraft rather than visual references outside the cockpit. Typically, IMC occurs when visibility is reduced to less than three miles and/or when the cloud cover is below certain altitudes, making it difficult for pilots to see the terrain or other aircraft.

Pilot training emphasizes proficiency in flying under IMC to ensure safety and compliance with regulations when operating in such conditions. Understanding IMC is crucial for instrument ratings and flight operations, as it prepares pilots to interpret and manage the challenges associated with flying solely by instruments.