Mean sea level (MSL) which is the average level of the sea. Determinig "sea level" is a very complex measurement. All other altitude measurements in aviation, in one way or another, are referenced from the mean sea level.
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The location of an object in space is called its position. This can be described using coordinates such as latitude, longitude, and altitude in relation to a reference point.
The symbol for altitude is typically "h," and it represents the vertical distance above a reference point, usually sea level. It is commonly used in mathematics, physics, and aviation to denote height or elevation.
Attitude refers to a person's perspective, belief, or feeling towards something or someone. Altitude, on the other hand, refers to the height of an object or location above a reference point, such as sea level.
Actually, altitude is the height of an object above a specific reference point, usually the observer's horizon. It is measured in degrees, with 0 degrees being right on the horizon and 90 degrees directly overhead.
The highest point a rocket reaches during its flight is typically the apogee, which is the point of maximum altitude. This is the point where the rocket reaches its peak altitude before descending back to Earth.