Elevation or altitude is generally expressed as " metres above mean sea level" in the metric system, or " feet above mean sea level" in United States customary and imperial units. Common abbreviations in English are: AMSL – above mean sea level [3] ASL – above sea level [4] FAMSL – feet above mean sea level [5] FASL – feet above sea ...

2023年7月20日 · Mean Sea Level (MSL): An aircraft’s altitude above the average level of the world’s oceans. Above Ground Level (AGL): An aircraft’s height above the Earth’s surface directly beneath it. In other words, MSL tells you how high you are relative to sea level, while AGL tells you how high you are relative to the ground directly below.

The global MSL is a type of vertical datum – a standardised geodetic datum – that is used, for example, as a chart datum in cartography and marine navigation, or, in aviation, as the standard sea level at which atmospheric pressure is measured to calibrate altitude and, consequently, aircraft flight levels.

2020年2月20日 · MSL stands for Mean Sea Level or more accurately, Above Mean Sea Level. Altitude values expressed in MSL are measured against the sea level, which makes it a constant value regardless of the terrain you’re flying over.

2024年6月20日 · Mean sea level (MSL) and mean tide level (MTL) are both measurements used to describe the average height of the ocean’s surface. While they are related, there are some key differences between the two: 1. What is MTL? MTL is the average of mean high water (MHW) and mean low water (MLW) over a period, such as a year. 2. What is MSL?

2022年6月3日 · MSL is an acronym that stands for mean sea level. It is used by both aircraft pilots and drone pilots alike as one of many determinants of altitude. However, it is not a …

2024年6月17日 · The unit commonly used to measure sea level is meters above mean sea level (mamsl), abbreviated as MAMSL or mamsl. Other abbreviations include m.a.s.l., MASL, and meters above sea level.

Mean Sea Level (MSL) is the datum for measurement of elevation and altitude. Mean Sea Level is the equipotential surface of the Earth as described by the WGS84 geoid. The gravity field of the earth is neither perfect nor uniform because density …

2024年6月12日 · Mean Sea Level (MSL) is a standard reference used to measure altitude and elevation, representing the average level of the sea’s surface over time. MSL serves as a …

2023年11月8日 · Mean Sea Level (MSL) data is essential for flying at higher altitudes and is calculated using atmospheric pressure, helping pilots avoid midair collisions and maintain a safe altitude.