Maximum Height of 120 Metres from Terrain

Verified from official sources
UAS.OPEN.010UAS.OPEN.010Version 1Effective -Verified 24 August 2026

In plain language

You must keep your drone within 120 metres (approx. 400 feet) of the closest point of the ground. If you fly over hills or mountains, you must adjust your flight path to maintain this distance from the sloping terrain.

Requirement as structured

The unmanned aircraft must be maintained within 120 metres from the closest point of the surface of the earth when flying over terrain with natural elevations.

Original regulatory text

Where the UAS operation involves the flight of the unmanned aircraft starting from a natural elevation in the terrain or over terrain with natural elevations, the unmanned aircraft shall be maintained within 120 metres from the closest point of the surface of the earth. The measurement of distances shall be adapted accordingly to the geographical characteristics of the terrain, such as plains, hills, mountains.

Applies when

operation
EU UAS operation
regulatory category
Open