Which of the following is an example of instrument meteorological conditions?

• A. Visibility less than 3 statute miles with a 1000-foot ceiling
• B. Visibility greater than 5 statute miles with clear skies
• C. Light rain with no ceiling
• D. Strong winds aloft with no vis limit

Answer: (A)

Instrument meteorological conditions occur when you don’t have enough outside visual references to fly visually, so you must rely on instruments. The defining thresholds are a ceiling of 1,000 feet or lower and visibility of 3 miles or less.

The scenario described—visibility under 3 statute miles with a 1,000-foot ceiling—meets those thresholds, so it represents IMC. The other options describe conditions compatible with visual flight rules (clear skies with good visibility) or are ambiguous about actual visibility and cloud layers, so they don’t illustrate IMC.