Certified Flight Instructor (CFI) Practice Exam

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What does "BC" indicate in METAR terminology?

Patchy/Patches
Before Conditions
Base Cloud
Breezy Conditions

The correct answer is: Patchy/Patches

In METAR terminology, "BC" stands for "Patchy" or "Patches," particularly relating to clouds or weather phenomena. It is used to describe a situation where a certain weather element, such as fog or clouds, is present in a localized or uneven distribution instead of being widespread. This term helps pilots and meteorologists understand the variability of weather conditions in a specific area, which is critical for flight planning and safety. The other options do not accurately represent the meaning of "BC" in METAR. "Before Conditions," "Base Cloud," and "Breezy Conditions" do not reflect the standardized abbreviations used in METAR reports, where specific terms are employed to convey precise weather information to pilots efficiently. Understanding these abbreviations ensures that aviation personnel can interpret weather data quickly and respond appropriately.