The Seawise Giant earlier called Oppama, later called Happy Giant, Jahre Viking, Knock Nevis, and Mont was the longest self-propelled ship in history, built in 1974–1979 by Sumitomo Heavy Industries in Yokosuka, Kanagawa, Japan. It possessed the greatest deadweight tonnage ever recorded. Fully laden, her displacement was 657,019 tonnes.
The heaviest self-propelled ship of any kind, and with a laden draft of 24.6 m (81 ft),it was incapable of navigating the English Channel, the Suez Canal or the Panama Canal. Overall, it is generally considered the largest self-propelled ship ever built.In 2013 her overall length was surpassed by 30 m by the floating liquified natural gas installation Shell Prelude (FLNG), a monohull barge design 488 m (1,601 ft) long and 600,000 tonnes displacement. Seawise Giant's engines were powered by Ljungström turbines.
Seawise was damaged in 1988 during the Iran–Iraq war, but was later repaired and restored to service. The vessel was converted to a floating storage and offloading unit (FSO) in 2004, moored off the coast of Qatar in the Persian Gulf at the Al Shaheen Oil Field.
The vessel was sold to Indian ship breakers, and renamed Mont for a final journey in December 2009. After clearing Indian customs, the ship sailed to Alang Ship Breaking Yard, Alang, Gujarat, where it was beached for scrapping, which was completed in 2010.
Size
Seawise Giant was the longest ship ever constructed, at 458.45 m , longer than the height of many of the world's tallest buildings.
Despite a great length, Seawise Giant was not the largest ship by gross tonnage, ranking sixth at 260,941 GT, behind the crane ship Pioneering Spirit and the four 274,838 to 275,276 GT Batillus-class supertankers. It was the longest and largest by deadweight: 564,763 tonnes.
According to Seawise's captain, S. K. Mohan, the ship could reach up to 16.5 knots (30.6 km/h) in good weather and the turning circle in clear weather was about 3 km.
data source(wikipedia)
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