Celebrating 10 Years of Time-Based Separation: A Decade of Innovation in Air Traffic Management
A Landmark in Aviation Efficiency
Today marks a significant milestone in the evolution of air traffic management at Heathrow Airport as NATS and Leidos commemorate the 10th anniversary of Time-Based Separation (TBS). Over the past decade, this innovative technology has reshaped approach operations, delivering substantial environmental and operational benefits that have revolutionized the aviation industry.
What is Time-Based Separation?
TBS is a cutting-edge system that dynamically adjusts the spacing between arriving aircraft based on time rather than distance. This advanced approach has proven to be a game-changer, significantly reducing airborne holding times, minimizing fuel consumption, and cutting carbon emissions. By optimizing landing sequences, TBS enhances operational efficiency while improving punctuality for both airlines and passengers.
Transformative Impact on Heathrow Operations
Since its implementation at Heathrow in 2015, TBS has achieved impressive results. The system has reduced delays caused by headwinds by 62%, cutting airborne holding by an astounding 1,500,000 minutes—the equivalent of nearly three years of cumulative holding time. This efficiency boost has translated into significant fuel savings, with over 100,000 tonnes of fuel conserved, amounting to approximately USD 70 million at current jet fuel prices.
In addition, TBS has contributed significantly to environmental sustainability. By preventing unnecessary fuel burn, the system has reduced CO2 emissions by more than 300,000 tonnes, aligning with the aviation industry’s efforts to minimize its carbon footprint.
A Collaborative Success Story
The success of TBS is a testament to the power of collaboration between industry leaders. Originally developed and deployed by NATS and Leidos for Heathrow Airport, TBS has become a global benchmark in air traffic management, inspiring adoption at other major international airports as part of the Intelligent Approach toolset.
Chris Norsworthy, NATS Director of Airspace and Future Operations, emphasized the groundbreaking nature of this achievement:
« Time-Based Separation is a great example of how technology can transform air traffic management. By working closely with Heathrow and Leidos, we pioneered and delivered a solution that benefits passengers, airlines, and the environment. We’re incredibly proud of what we’ve achieved together. »
Research on Time Based Separation was carried out by NATS as part of the SESAR Programme.
Economic and Operational Gains for Airlines
Beyond its environmental advantages, TBS has delivered considerable economic savings for airlines. Reduced airborne holding times translate into lower operational costs. According to a 2015 Eurocontrol study, the cost of extended flight times is estimated at €100 per minute. Since its introduction, TBS has saved airlines approximately €184 million, underscoring its economic value.
Dale Reeson, Heathrow’s Director of Airside and Airspace Operations, highlighted the broad benefits of TBS:
« Time-Based Separation has been a game-changer for Heathrow. For airlines, it has unlocked major efficiencies, cutting fuel consumption and costs. For passengers, it has meant smoother, more reliable journeys. And for us, it has enabled Heathrow to be more resilient while reducing our environmental impact. TBS is a perfect example of how innovation can deliver benefits for everyone. »
A Model for the Future of Aviation
TBS stands as a shining example of how technology-driven advancements can yield tangible benefits for the aviation industry and the environment alike. As air traffic volumes continue to grow, intelligent air traffic management solutions will be crucial in ensuring efficiency, sustainability, and resilience in the sector.
Looking ahead, NATS and Leidos remain committed to driving innovation and enhancing air traffic operations. The ongoing evolution of technologies like TBS within the Intelligent Approach suite promises a future where air travel is not only more efficient but also more environmentally responsible.
A Decade of Progress, A Future of Possibilities
The first ten years of TBS have delivered undeniable benefits for Heathrow and the global aviation community. With continuous advancements in air traffic management, the industry is poised to further reduce its environmental impact while improving the efficiency of air travel worldwide. As we celebrate this milestone, the future of intelligent air traffic management holds even greater promise for sustainable, efficient, and passenger-friendly aviation.
