Attitude Line of Sight (ALOS) Definition

In plain language

ALOS is how far away you can still tell which way the drone is facing and where it is.

Requirement as structured

ALOS is defined by EASA guidance as the maximum distance up to which a remote pilot can detect the position and orientation of the unmanned aircraft, and so control its flight path. EASA states this distance was determined in practical tests.

Original regulatory text

Attitude line of sight (ALOS): The ALOS defines the maximum distance up to which a remote pilot can detect the position and orientation of the UA. Up to this limit, the remote pilot is able to control the flight path of the UA and is able to determine the attitude and position of the UA. This distance was determined in practical tests.

Applies when

operation

VLOS

regulatory category

Specific