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Netherlands () The world's largest floating crane ship is Thialf, a 201.6 m (661.4 ft) long semi-submersible barge with a lifting capacity of 14,200 tonnes (31.3 million lb). Thialf is operated by Heerema Marine Contractors of the Netherlands.
Other Biggest Boats in the World. In 2010, the biggest yacht in the world was launched. She is named the Eclipse and is 557 feet or 170 meters long. The owner is Roman Abramovich, the designer was Terence Disdale, and the builder was Blohm + Voss in Hamburg, Germany. She has diesel propulsion, can cruise at 22 knots, and her top speed is 25 knots.