• In early 2000, EUROCONTROL started researching TBS Time Based Separation (TBS), a new operating procedure for separating aircraft by time during strong headwind conditions, instead of distance.
  • Together with NATS, a successful validation of the concept has been achieved within the SESAR (Single European Sky ATM Research) research programme, that paved the way to the first TBS deployment in spring 2015 at London Heathrow airport. 
  •  The deployment of TBS at London Heathrow has helped “claw back” up to 50% of headwind-related delays. Since TBS went live on 24 March 2015 there has been no increase in wake turbulence events and no increase in the number of go-arounds.
  • TBS’s success prompted the European Commission to put forward a further sixteen airports as potential beneficiaries for TBS deployment in the SESAR Deployment Regulation (EU) No 716/2014.
  • On the basis of the work conducted in SESAR, EUROCONTROL was mandated by the European Commission to draft a technical Specification for Time Based Separation. This specification defines a set of performance requirements for a TBS support tool, which complies with the Commission’s Implementing Regulation and have been released for consultation with Stakeholders in 2016.
  • Following the consultation process, the first edition of the EUROCONTROL Specification for Time-Based Separation (TBS) support tool for Final Approach has been published on February 2018 and is available for download via EUROCONTROL website http://www.eurocontrol.int/publications/eurocontrol-specification-time-based-separation-tbs-support-tool-final-approach.