Certified Flight Instructor (CFI) Practice Exam

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What does "BR" mean in the context of METAR?

Mist
Barometric Readings
Base Reference
Brightness Ratio

The correct answer is: Mist

In the context of METAR, "BR" stands for mist. METAR is an aviation routine weather report that provides critical information about meteorological conditions at an airport or weather station. Mist is defined as a type of weather phenomenon characterized by the presence of small water droplets in the air, which can significantly reduce visibility, typically between 5/8 statute miles and 7 statute miles. This is particularly important for pilots and air traffic control in terms of flight safety and operational decisions. Understanding the abbreviations used in METAR reports is essential for evaluating weather conditions accurately, allowing pilots to plan and execute flights safely. The other options provided are not associated with standard aviation weather reporting and would not inform pilots about visibility conditions in the way "BR" does.