Certified Flight Instructor (CFI) Practice Exam

Which condition does "VA" specifically describe in METAR?

1. Volcanic Ash

2. Visual Altitude

3. Variable Atmosphere

4. Vertical Airflow

The correct answer is: Volcanic Ash

The abbreviation "VA" in METAR reports specifically refers to volcanic ash. METAR (Meteorological Aerodrome Report) is a standardized format for reporting current weather conditions at airports. The presence of volcanic ash is significant for aviation, as it can pose serious hazards to aircraft, including engine failure and reduced visibility. When volcanic activity occurs, and ash is detected in the atmosphere, it is crucial for flight operations to have timely and accurate information. Therefore, the reporting of volcanic ash as "VA" helps pilots, air traffic controllers, and meteorologists assess the weather conditions and make informed decisions regarding safety and flight planning. Other options, while they may seem plausible in aviation contexts, do not reflect the specific use of "VA" in METAR. Visual altitude, variable atmosphere, and vertical airflow do not have standardized abbreviations within aviation meteorology like "VA" does for volcanic ash.