---
title: "Above Mean Sea Level — aviation glossary — OnlyPlanes"
description: "Altitude or elevation referenced to mean sea level."
canonical_url: "https://onlyplanes.ru/en/learn/amsl"
locale: en
meta:
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  "og:description": "Altitude or elevation referenced to mean sea level."
  "og:image": "https://onlyplanes.ru/images/aviation/aircraft/boeing-787.webp"
  "og:title": "Above Mean Sea Level — aviation glossary"
---

> Index of every page on this site: [llms.txt](https://onlyplanes.ru/llms.txt)

Aviation abbreviation

# Above Mean Sea Level

ABBR · Navigation

At a glance

## Meaning of Above Mean Sea Level

Altitude or elevation referenced to mean sea level.

### More about Above Mean Sea Level

AMSL identifies the vertical reference used for a height value. It differs from AGL, which refers to the ground at a location.

The distinction matters when comparing terrain, aerodrome elevations and aircraft altitude. Values should not be combined without checking that their references and units agree.

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