SINGAPORE (May 20): How do you install a wind turbine almost the size of the Chrysler building in the open ocean? Just get a boat with deck space larger than a football field and a crane that can lift the weight of 1,100 Chevy Suburban SUVs.

Those specialist ships are scarce, numbering about a dozen in the world. And at a cost of more than US$300 million ($410.8 million), they each need to be capable of hoisting generators the size of shipping containers atop steel towers hundreds of feet tall.

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