Seawise Giant

	TT Knock Nevis, formerly Seawise Giant, leaving the Dubai Drydocks
History
Name	Seawise Giant (1979–1991); Happy Giant (1991); Jahre Viking (1991–2004); Knock Nevis (2004–2009); Mont (2009–2010);
Owner	Amber Development (2009–2010); First Olsen Tankers Pte. (2004–2009); Loki Stream AS (1991–2004);
Operator	Prayati Shipping (2009–2010)
Port of registry	Norway (1980–2004); Singapore (2004–2010);
Builder	Sumitomo Heavy Industries, Ltd.; Yokosuka, Kanagawa, Japan;
Completed	1979
Out of service	1988 and 2009
Identification	Call sign: S6AV7; DNV ID: 16864; IMO number: 7381154; MMSI no.: 564687016;
Fate	Scrapped in 2010
Notes
General characteristics
Type	Crude oil tanker
Tonnage	260,941 GT; 214,793 NT; 564,763 DWT;
Displacement	81,879 long tons light load; 646,642 long tons full load;
Length	458.45 m (1,504.10 ft)
Beam	68.6 m (225.07 ft)
Draft	24.611 m (80.74 ft)
Depth	29.8 m (97.77 ft)
Propulsion	2 Mitsubishi V2M8 boilers (Designed by Combustion Engineering); Sumitomo Stal-Laval AP steam turbine, 50,000 hp;
Speed	16.5 knots (30.6 km/h; 19.0 mph)
Capacity	4.1 million barrels
Notes

The TT Seawise Giant—earlier Oppama; later Happy Giant, Jahre Viking, Knock Nevis, and Mont—was a ULCC supertanker that was the longest self-propelled ship in history, built in 1974–1979 by Sumitomo Heavy Industries in Yokosuka, Kanagawa, Japan. She 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), she was incapable of navigating the English Channel, the Suez Canal or the Panama Canal. Overall, she 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.

She 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 she was beached for scrapping, which was completed in 2010.

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