HEMS, public airports, military air bases or restriction areas or so-called drone zones where drone flights are prohibited.
Around the airports, air bases and HEMS you find a stronger marked out red colour from the runways or helipads. This stronger marking delineates HEMS with 1 km from the center of the helipad and public air fields and military air bases with 3 and 2 km from the center of the runways respectively. Within these areas, flights with drones are prohibited for everyone.
Surrounding the stronger red marking, you find two lighter red markings, which delineates the area where you can fly maximum 40 metres above the level of the runway or helipad. For airports and airfields the second ring delineates the area where you can fly maximum 30 metres above runway level. However, you must have a drone certificate of competence A2 before you can fly in the two outer rings.
If the red colour is indicative of a restriction area, there are no lighter markings surrounding the area. That is because flights with drones are generally prohibited (unless the description of the area explicitly states that drone flights are allowed).
Airports, air bases, permanent and temporary restriction areas are mentionen in the order on drones, sections 9-10 (order no. 1649). The restriction areas are based on NOTAMs - Notice To AirMen is A special announcement for manned aviation regarding changes that may effect air traffic.