EASA subject
Flight Safety
VLOS, responsibility, uninvolved persons
Open category pillars: VLOS, 120 m, distance from uninvolved persons, and no flight over assemblies of people.
Key concepts
- VLOS
- The UAS must remain continuously visible without visual aids — the foundation of the open category.
- 120 m
- Maximum height in the open category above the nearest surface.
- Uninvolved persons
- People not participating in the operation — distance rules apply.
Common mistakes
- Flying over assemblies of people in the open category
- Replacing VLOS with the screen display
- Dropping objects from the UAS
Exam traps
- What counts as an assembly of people
- Controllable ground area
Real-world example
The UAS is lost from VLOS behind a building — the pilot must terminate the flight.