Which of the following is NOT a recognized icing intensity?

The correct answer identifies "Heavy" as something that is not a recognized icing intensity. In meteorological terms, icing intensity classifications help pilots and air traffic controllers understand the severity of icing conditions that can affect aircraft operations. The recognized categories typically include Light, Moderate, Severe, and Trace.

• "Light" icing indicates minimal accumulation, which should not pose significant problems for aircraft.

• "Moderate" icing suggests a more substantial accumulation that may require immediate pilot action.

• "Severe" icing represents extreme conditions where the aircraft may experience a rapid accumulation of ice, significantly compromising safety and requiring urgent measures.

• "Trace" refers to very light icing, barely measurable, and not likely to affect performance.

Thus, the presence of "Heavy" icing as an intensity level is not officially recognized within this framework. Instead, the established classifications range from light to severe. This understanding is crucial for pilots making informed decisions regarding weather conditions and potential impacts on flight safety.