altimeter settings
An altimeter setting is a reference number used by pilots and air traffic controllers to ensure accurate altitude readings. It adjusts the altimeter, which measures an aircraft's height above sea level. The setting is typically based on the current atmospheric pressure at a specific location, often reported in inches of mercury (inHg) or hectopascals (hPa). When pilots use the correct altimeter setting, they can maintain safe altitudes, avoid collisions, and ensure they are flying at the correct height above terrain, especially during landing and takeoff. Accurate settings are crucial for safe aviation operations.
Additional Insights
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Altimeter settings refer to the barometric pressure adjustments made to aircraft altimeters to ensure they accurately measure altitude above sea level. The altimeter uses air pressure to determine height; as altitude increases, atmospheric pressure decreases. Pilots receive a standardized pressure setting from air traffic control, often expressed in inches of mercury (inHg) or millibars (hPa). Setting the altimeter correctly is crucial for safe flight operations, as it helps prevent collisions with terrain and maintains proper altitude during flight. Regular adjustments are necessary as aircraft pass through different pressure zones or approach runways.