Our glossary contains frequently used terms and acronyms together with their explanations.

Flight procedures

If a new runway is built at an existing airport, DFS is legally obliged to connect this new runway to the route network using suitable approach and departure procedures. The goal is to enable the safe, orderly and expeditious handling of the traffic approved by the official authority. When planning procedures, DFS adheres to the provisions of the International Civil Aviation Organisation (ICAO), which sets the standards for the construction and design (use) of procedures, for example in Doc 8168 (Aircraft Operations) and Doc 4444 (Air Traffic Management).

As a rule, it is possible to construct several variations of a departure route that differ significantly in the course that they take, thus resulting in different types of noise impact. Determining the noise disturbance is just as much a part of planning flight procedures early on as are the key criteria of safety, capacity and distance. Alternative route variations are compared and are weighted against each other. For this purpose, DFS uses an analysis tool called NIROS (Noise Impact Reduction and Optimisation System). Using NIROS, different departure route variations can be analysed, allowing the noise impact to be determined (number of people subjected to a certain sound pressure level).

Following internal planning at DFS, these variations are then presented to the local Noise Abatement Commission for consultation purposes. This commission is anchored in the German Aviation Act in order to give the affected communities a chance to participate in noise abatement issues. DFS incorporates the results of the consultation by the Noise Abatement Commission in its final deliberations and submits them along with a procedural recommendation to the Federal Supervisory Authority for Air Navigation Services (BAF) - the supervisory authority for air navigation services organisations in Germany. The BAF examines the DFS deliberation documents and simultaneously forwards them to the Federal Environment Agency requesting an expert opinion. These two authorities then send a final regulation proposal to the Federal Ministry of Justice for a legality check. If the proposal passes the check, the procedures are deemed a statutory regulation by the Federal Ministry of Justice and enter into force upon publication in the Federal Gazette (Bundesanzeiger).