Microlight terrain
Ultralight airfields (UL areas) are specially approved systems that have a general operating license exclusively for landing and starting microlight aircraft . All other aircraft may only operate on a UL site with a special permit. UL sites do not have an ICAO code and are not subject to any operational obligations . Mostly they are maintained and looked after by local air sports clubs.
Since microlight aircraft have relatively short take-off and landing distances, the runways on UL sites are typically between 180 and 400 m long.
Since the lanes of UL sites usually have no solid surface, but only a sward, they can be set up without profound interventions in nature. It is usually sufficient to apply for an operating license for an existing suitable meadow. There are hardly any underground construction work.
Although colloquially referred to as such, UL sites are not airfields under aviation law , as the operating license only extends to air sports equipment and therefore not to aircraft (in the aviation law sense).