Airservices is Australia's air navigation service provider - we provide air traffic control, aviation rescue and fire fighting and air navigation services.

How we help airlines reduce emissions

aircraft in sky

Airservices is committed to reducing the environmental impact of aviation. We do this by proving airlines and operators with options for continuous decent approaches, flexible flight tracks (Flextracks) and special air traffic procedures that all have positive effects towards reducing emissions.

Continuous descent approaches

Air traffic control assist aircraft to make safe and efficient descents to their destination airport by using continuous descent approaches reducing fuel consumption, greenhouse gas emissions and aircraft noise.

Landing procedures have traditionally involved aircraft descending in successive steps from cruising altitudes to the runway. In a continuous descent approach the aircraft flies from cruise altitude all the way down to the runway in one smooth and uninterrupted descent. Under ideal circumstances a plane can practically glide into the airport with engines idling. This descent can last anything up to 20 minutes.

Early trials have demonstrated that a continuous descent approach can save as much as 400 kg of fuel per arrival, depending on aircraft size, weather and other air traffic conditions. This means more than a tonne of CO2 reductions per flight.

Around busy airports in congested airspace this can actually be difficult to achieve and is made more complicated by bad weather.


High altitude jet-stream winds can dramatically affect an aircraft’s speed and fuel consumption on long distance flights. Flextracks, which diverge from fixed or direct routes, are designed to use these winds to an aircraft’s advantage and avoid strong headwinds.

Airservices Network Coordination Centre calculates and publishes Flextrack information for airlines flying into and out of Australian airspace offering them the most of prevailing weather patterns and winds to improve flight time and reduce fuel usage, delivering considerable environment benefits through a reduction in emissions and reducing operating costs for airlines.

Flextracks are now being used widely between Australia and airports in Asia and the Middle East.


The Asia and South Pacific Initiative to Reduce Emissions (ASPIRE) was created to reduce greenhouse gas emissions from aviation through technological innovation and best practice air traffic management.

ASPIRE was established in February 2008 as a joint partnership between Airservices Australia, Airways New Zealand and the Federal Aviation Administration of the United States of America.

In October 2009, ASPIRE was expanded to include the Japan Civil Aviation Bureau and in February 2010, the Civil Aviation Authority of Singapore was welcomed to the ASPIRE group. The Aeronautical Radio of Thailand Limited formally joined ASPIRE in June 2011.

To complement the work of the ASPIRE partnership, the Indian Ocean Strategic Partnership to Reduce Emissions (INSPIRE) was formed in March 2011 as a collaborative network of partners and peer organisations dedicated to improving the efficiency and sustainability of aviation across the Arabian Sea and Indian Ocean region.

The foundation partners of INSPIRE are like-minded air navigation service providers which have the capacity and capability to provide leadership and contribute resources to the administration of the group. Founding partners include Airports Authority of India, Airservices Australia and Air Traffic and Navigation Services of South Africa.

These partners are supported and assisted by a number of airline and peer organisation members.

Airservices maintains a strong commitment to the ASPIRE and INSPIRE programs.