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Seawise Giant, later Happy Giant, Jahre Viking, Knock Nevis, Oppama, and finally Mont, was a ULCC supertanker and the largest ship ever built.

Ordered in 1974 and completed in 1979 in Japan, she remained unnamed for a long time - identified as only “1016”. Eventually, she was sold to Sumitomo Heavy Industries as Oppama.

Very soon after, the ship was sold to Hong Kong Orient Overseas Container Line, which lengthened the ship from her original plans and added 146,152 tons of cargo capacity through jumboisation. She was relaunched in 1981 with the name ’Seawise Giant’. She was 458 metres long, with a beam of 68 metres, and a laden draft of 24 metres. Her displacement was 657,019 tons. She was incapable of navigating the English Channel, Suez Canal, or the Panama Canal.

Her rudder alone weighed 230 tons, the propeller another 50.

On 14 May, 1988, while carrying Iranian crude oil, Seawise Giant was sunk by Iraqi Air force planes. she was struck by parachute bombs that ignited fires aboard the ship - and she sank in shallow waters, declared a total loss.

Shortly after the war ended, Norman International bought the hulk.

They raised and repaired her, and renamed her ’Happy Giant’, re-entering serice in October of 1991. Jørgen Jahre also bought the ship in that year, renaming her Jahre Viking. From 1991 to 2004 she flew under the Norwegian flag.

In 2004, First Olsen Tankers renamed her Knock Nevis, and then converted her into a permanently moored storage tanker in the Persian Gulf. In 2009, she was renamed Mont - reflagged to Sierra Leone by her new owners, and sent on her final voyage to India to be scrapped. She was beached on December 22, 2009.

Her 36 ton anchor was saved by the Hong Kong Maritime Museum.

Her top speed was 16.5 knots in good weather, and it took five and a half nautical miles to stop at that speed. Her turning circle was about three kilometres in clear weather.

She was longer than the height of many of the worlds tallest buildings.