Towards the end of 2024, NATS’ Swanwick air traffic control centre deployed an innovative solution to enhance the efficiency of separating arriving aircraft at Heathrow airport. Pairwise separation considers “the specific characteristics of each individual aircraft type” when calculating separation time, moving beyond the traditional six categories that are commonly used.
This “granular technique” will empower air traffic controllers to minimise gaps between pairs of aircraft and reduce airborne holding. The graphics below illustrate how it differs from typical methods.
Pairwise, a new module in the Intelligent Approach tool, combines NATS’ air traffic expertise with technology provider and systems integrator, Leidos‘ cutting-edge technology. With existing modules from Intelligent Approach already in place at Heathrow, Toronto Pearson, and Amsterdam Schiphol airports, the tool has driven efficiency and environmental benefits “cutting headwind delays by more than 60% and reduced airborne holding by 230,000 minutes per annum, saving over 45,000 tonnes of CO2.”
Image credit: NATS
Image credit: NATS
Speaking on the solution, Chris Norsworthy, NATS Director Airspace & Future Operations, said:
“The introduction of Pairwise as part of Intelligent Approach is another world first and testament to our continuous efforts to improve the quality of the service we provide to our airport and airline customers. Delivering additional operational resilience for Heathrow will make a real positive difference to airline punctuality, helping to improve the passenger experience and reduce carbon emissions.”
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