Intelligent Approach is the world’s only time-based arrival spacing (TBS) tool. Developed by the National Air Traffic Services (NATS) in collaboration with Leidos UK, it was implemented at London Heathrow Airport (LHR) in 2015 and launched late last month at Amsterdam Schiphol Airport (AMS). It promises cuts of a trifecta of aviation scourges – delays, emissions and noise. But how exactly does the tool accomplish this? Let’s take a closer look and find out.