Seawise Giant

Also known as Happy Giant, Jahre Viking, Oppama, Mont, 1016, Porthos, IMO 7381154

scrapped ULCC supertanker

Key facts

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
Out of service: 1988 and 2009
Identification: Call sign : S6AV7 DNV ID: 16864 IMO number : 7381154 MMSI no.: 564687016
Fate: Scrapped in 2010
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

Article

TT Seawise Giant—formerly Oppama; later Happy Giant, Jahre Viking, Knock Nevis, and Mont—was a ULCC supertanker and the longest self-propelled ship in history. It was built in 1974–1979 by Sumitomo Heavy Industries in Yokosuka, Kanagawa, Japan. Seawise Giant's engines were powered by Ljungström turbines. The ship possessed the greatest deadweight tonnage ever recorded. Fully laden, her displacement was 657,019 tonnes.

At the time she was built, she was the heaviest self-propelled ship of any kind. With a laden draft of 24.6 m (81 ft) and a length of 458.45 m (1,504.1 ft), the ship was incapable of navigating the English Channel, the Suez Canal or the Panama Canal. She is generally considered the largest self-propelled ship ever built. In 2013, her overall length was surpassed by 30 m (98 ft) by the floating liquefied natural gas (FLNG) installation Shell Prelude, a monohull barge design 488 m (1,601 ft) long with 600,000 tonnes displacement..