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Oct 19, 2021 · To recap, here’s a quick summary of the types of altitude used in aviation: Indicated altitude: altimeter reading. Absolute altitude: above ground level. True altitude: above sea level. Pressure altitude: above the standard datum plane. Density altitude: air density expressed as an altitude. Flight level: Pressure altitude in 100s of feet.
- Indicated Altitude. Let's start with the easiest altitude first. Indicated altitude is simply the altitude you read directly off your altimeter.
- Pressure Altitude. When you set your altimeter to 29.92, you're flying at standard pressure altitude. This is the altitude of the aircraft above the standard datum plane, the theoretical location where at 15 degrees Celsius the altimeter setting will equal 29.92 inches of mercury.
- Density Altitude. Density altitude is pressure altitude corrected for non-standard temperature. When it's hot outside, your airplane doesn't perform as well.
- True Altitude. True altitude is the vertical distance of your airplane above sea level. Commonly expressed as "feet MSL" (feet above mean sea level), many of the airspace altitudes, terrain figures, airways, and obstacles you'll find on aeronautical charts are expressed in true altitude (MSL), feet above sea level.
Oct 6, 2023 · Definition of Pressure Altitude: Pressure altitude is the indicated altitude calibrated for your elevation above the standard datum plane (a theoretical atmospheric level where the atmospheric weight is 29.92” Hg). You may also hear it referred to as corrected barometric altitude.
Jun 7, 2022 · Pressure altitude is the indicated altitude when an altimeter is set to 29.92 inHg (1013 hPa in other parts of the world). In other words, it is the height above a Standard Datum Plane (SDP ...
Mar 9, 2017 · Pressure altitude is the indicated altitude when an altimeter is set to 29.92 (1,013.2 mb).; It is the height above the standard datum plane; it can also be determined by applying a correction ...
Jan 5, 2024 · Indicated Altitude. Indicated altitude is what you read off of the altimeter. It may be fairly accurate depending on how well the instrument is calibrated and if you have the proper altimeter setting put in. Remember, when you see the word “indicated” in aviation, it means it’s not always correct, and there’s more to the story!
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Understanding the Five Types. There are five types in aviation: absolute, true, indicated, pressure, and density altitude. Each of these has a specific purpose and is used under different circumstances. Absolute type refers to the actual height of an aircraft above the Earth’s surface. True type is the elevation above mean sea level.
