"See and Avoid" is one of the most important principles in aviation because pilots can only avoid a potential danger if they see it early enough, ist eines der wichtigsten Particularly helicopters of the Police, rescue organizations and operators conducting pipeline supervision flights must be enabled to detect power lines. Therefore the flight protections spheres are installed in those lines where the potential risk for aviation is high which is close to highways, valleys and airports.

In course of time the spheres weather or are used as targets for hobby shooters. They lose their color and/or are damaged and need to be exchanged.