Advanced Mobile Location (AML) can quickly pinpoint an emergency caller’s whereabouts to within 100 metres, enabling first responders to attend to a situation without conducting time-consuming searches. Using a Global Navigation Satellite System (GNSS) or Wi-Fi technology (depending on the stronger signal), AML compiles the best location information available. ESA plays a key role in delivering more precise caller location information through AML via it's navigation system, Galileo.