Conventional Navaids

Conventional navaids are the ‘ground-based’ part of the navigation infrastructure. It refers to the navigation aids such as NDB (Non-Directional Beacon), VOR (Very High Frequency Omni-directional Range), DME (Distance Measuring Equipment), as well as ILS (Instrument Landing System) and MLS (Microwave Landing System).

EUROCONTROL activities

In the context of SESAR WP 15.3.1 and 15.3.2:

EUROCONTROL is involved in a variety of projects to optimise conventional infrastructure. In particular, the deployment of new facilities to support PBN needs to be considered judiciously, partly owing to cost but more importantly because of spectrum issues. The L-band from 960 to 1215 MHz contains established navigation and surveillance systems (DME, SSR) while a variety of new CNS services (GNSS, ADS-B and others) are also trying to find a home. Infrastructure activities contribute cross-discipline expertise to ensure that new services can be implemented safely. Especially the planning of DME evolution will require a new level of cross-border cooperation in the coming years, because DME/DME positioning is an established GNSS back-up while new CNS services are needed just as much for SESAR's trajectory-based operations.

This activity includes the upgrade of the DEMETER tool, and associated validation efforts to investigate what level of coverage prediction accuracy can be achieved with a specific level of terrain data quality and resolution. Such efforts are crucial for realistic evolution planning which succeeds in striking a good balance between infrastructure cost and operational safety and efficiency.

In the context of the EUROCONTROL NSG, EUROCONTROL continues to support air navigation service providers and airspace users in ensuring that thanks to an interoperable and continual service, navigation systems remain an invisible success story.