Title: Define Instrument Meteorological Conditions (IMC) and Visual Meteorological Conditions (VMC).
Course: Air Traffic Controller (20999) > Section: Understanding Meteorology

Definition of IMC should include the concept that it is a category that describes weather conditions during which visibility is less than three miles and the ceiling is less than 1,000 feet.

Definition of VMC should include the concept that it is a category that describes weather conditions during which visibility is better than three miles and the ceiling is more than 1,000 feet.

Process/Skill Questions:

- How are IMC and VMC the same and different?
- To what does the term ceiling refer?