http://www.theage.com.au/national/flying-b...80604-2ly3.html
"MELBOURNE Airport will become the first Australian airport to obtain certification allowing aircraft to land in fog in a bid to avoid the kind of delays experienced by passengers this week. At least nine flights had to be diverted and a further 14 domestic flights were delayed on Tuesday after heavy fog blanketed the city and reduced visibility to 100 metres.
By the end of the year, Melbourne Airport expects to have the country's first "category III" instrument landing system, a ground-based system that uses a combination of radio signals, high-intensity lighting and computer software to guide an aircraft towards the runway.
Centre-line lighting along the runway will be installed by Airservices Australia as part of the airport's $330 million expansion of the international terminal. "