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The Knock Nevis is a Norwegian owned supertanker, formerly known as Seawise Giant, Happy Giant, and Jahre Viking. It is 458.45 m (1,504 ft) in length and 68.9 m (226 ft) in width, making her the largest ship ever constructed (However, by gross tonnage measure, she is fifth, 236,710, behind the four Batillus class supertankers- 274,838-275,276 tons gross). It was built between 1979 and 1981, damaged during the Iran-Iraq War, and refloated in 1991, but is now used as an immobile offshore platform for the oil industry. Knock Nevis has a deadweight of 564,763 tonnes and a summer displacement of 647,955 t when laden with nearly 650,000 m³ (4.1 million barrels) of petroleum. The ship has a draft of 24.6 m (81 feet) when fully loaded, which makes it impossible for the ship to navigate even the English Channel, let alone man-made canals at Suez and Panama. http://en.wikipedia.org/wiki/Knock_Nevis Pic: Comparison of some of the longest ships (Knock Nevis, Emma Mærsk, RMS Queen Mary 2, MS Berge Stahl and USS Enterprise). Colours are representative of the ships' underside and topsides. Lengths are drawn to scale, the profiles are drawn using multiple photos and diagrams, and may not be entirely accurate. The ships are not the "five largest" in the world, but the largest of each type. Knock Nevis is still the largest ship ever built, and Emma Maersk the largest ship in operation.
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