Working arrangements

The EUROCONTROL Navigation Unit animates three Stakeholders’ groups:

  • The Navigation Steering Group (NSG)
  • The Landing and Take-Off focus group (LATO)
  • The RNAV Approach implementation Support Group (RAiSG)

The following table illustrates the topics addressed in each group:

  Infrastructure Applications
  Conventional GNSS Precision Landing PBN
(current and future core constellations and augmentations)
(including Precision Landing as reported by LATO)
(including PBN Approaches as reported by RAiSG)
LATO reports to NSG ILS, MLS GBAS X  
RAiSG reports to NSG   GPS standalone (with ABAS) and GPS with SBAS   PBN final approaches (RNP and RNP AR APCH)

The meeting material (agenda, presentations, working papers, etc.) is available to team members via the relevant Agency extranet, OneSky Online: Login to OneSky Online.

Please note that you need a username and password in order to access OneSky Online and have to apply for membership to each "team" individually.

Username and password for Onesky Online must be obtained via the Onesky Online interface. Application for membership for individual Teams can be done from the Onesky Teams page. For further details, please contact


 The Navigation Steering Group (NSG) is responsible for the development of navigation applications and the NAVAID infrastructure within a greater context of network operations and CNS. As such, the NSG is a sub-group of the Network Operations Team (NET OPS) as regards navigation applications and of the CNS Team as regards the NAVAID infrastructure.

The NSG ensures full coordination of application and infrastructure activities between the Network Operations Team and the CNS Team from which it receives instructions and guidance.

  • Applications: all PBN applications (including approaches) and precision landing
  • Infrastructure: conventional navigation aids and GNSS

The NSG is constituted in order to support both teams in providing a direct channel of communication between the EUROCONTROL Agency and its stakeholders on activities relating to the development of navigation applications and NAVAID infrastructure with a view to enhancing the safety, capacity and efficiency of the European ATM network and its interfaces with adjacent ATM structures.

It has to respond to the requirements set in the European ATM Master Plan within the framework of SESAR, SES regulations and to the EUROCONTROL Agency objectives. It acts as a steering committee, monitoring and directing the work of the following subordinate focus groups:

  • RNAV Approach implementation Sub Group (RAiSG)
  • Landing and Take-Off Focus Group


  • Applications: Precision Landing
  • Infrastructure: ILS, MLS, GBAS

LATO is responsible for the Precision Approach, Landing and Guided Take-off operations within the Navigation Unit. It covers the use of ILS, MLS and GBAS systems for these applications and reports to the NSG. LATO discusses both technical and operational aspects of Precision Approach operations.


  • Applications: PBN final approaches (RNP APCH and RNP AR APCH)
  • Infrastructure: GPS with ABAS and SBAS

RAiSG coordinates the activities necessary for the implementation of RNAV GNSS Approach procedures. It concentrates on the final approach segment but also addresses the transition from initial and intermediate approach segments where appropriate.

The support group covers all issues necessary for the operational implementation of RNAV Approaches in order to support the LSSIP objective NAV 10. The types of approach operations to be addressed include:

  • RNP APCH without vertical guidance (to LNAV and LP minima);
  • RNP APCH with vertical guidance based on Baro (to LNAV/VNAV minima - also called APV Baro);
  • RNP APCH with vertical guidance based on SBAS (to LPV minima - also called APV SBAS) and

These RNP APCH operations are described in the ICAO PBN manual.