The 488 metre (1,601 foot) long vessel cannot be described as a "ship" as it is unable to move under its own steam and must be towed. But its specifications are impressive, outstripping the 443-metre tall Empire State Building in New York. Once complete, the facility will weigh more than 600,000 tonnes fully loaded, displacing the same amount of water as six of the world's largest aircraft carriers.
Seventy-four metres wide and 110 metres high, it is expected to produce 3.6 million tonnes of LNG a year and its storage tanks have a capacity equivalent to approximately 175 Olympic swimming pools. Commissioned by the Dutch energy giant Shell, the facility is due to be delivered by September 2016. In a press release on its website, Shell said Prelude would operate in a remote basin around 475 kilometres (295 miles) north-east of Broome, a town in Western Australia, for around 25 years. It is an all-weather facility designed to withstand the most powerful category-five cyclone.