Airservices Australia has begun upgrading works on the instrument landing system (ILS) at Sydney airport.
The upgrading works have been scheduled so as to minimise the potential for operational disruption. However, while the systems are being upgraded until the end of March, there may be delays in the event of poor weather.
"This essential work supports Sydney airport [in] becoming a category II airport over the next 12 months, which will enhance capacity during low visibility conditions such as fog," says Kerrie Mather, chief executive of Sydney airport.
The ILS is a navigation aid that supports the safe and efficient movement of air traffic into and out of the airport, particularly during low visibility and bad weather conditions.
Airservices Australia provides air traffic management and related airside services to the country's aviation industry.