Definition The Seawise Giant was a supertanker, later an FSO (Floating Storage and Offloading unit), renowned as the longest ship ever built and possessing the greatest deadweight tonnage recorded.
Overview Constructed in 1979 by Sumitomo Heavy Industries at their Oppama shipyard in Japan, the vessel was designed for the Hong Kong shipping magnate C. Y. Tung. At its maximum capacity, it could carry over 564,000 deadweight tons (DWT) of crude oil. Its immense dimensions included a length of 458.45 meters (1,504.1 feet), a beam of 68.86 meters (225.9 feet), and a full-load draft of 24.6 meters (81 feet). Due to its extraordinary size, the Seawise Giant was unable to traverse the English Channel, the Suez Canal, or the Panama Canal, and required specialized deep-water ports for loading and unloading. Throughout its operational life, the ship underwent several name changes, including Happy Giant, Jahre Viking, Knock Nevis, and Mont, reflecting changes in ownership and purpose. In 1988, during the Iran-Iraq War, the vessel, then known as Seawise Giant, was severely damaged by an Iraqi air attack while loaded with Iranian crude oil. Declared a total loss and sunk, it was subsequently refloated, repaired in Singapore, and returned to service. The ship was ultimately sent to Alang, India, for scrapping in 2010 under the name Mont.
Etymology/Origin The name "Seawise Giant" was bestowed upon the ship by its initial owner, Tung Chao Yung (C. Y. Tung), whose company was named Seawise University. The name "Seawise" is a direct reference to his company, while "Giant" denotes the ship's unprecedented scale. Subsequent names reflected its various owners and operational transitions.
Characteristics
- Dimensions: With a length exceeding that of the Empire State Building (if laid horizontally), the Seawise Giant held records for overall length, deadweight tonnage, and gross tonnage for any ship ever constructed.
- Cargo Capacity: It was capable of transporting approximately 4.2 million barrels of crude oil.
- Maneuverability: Due to its massive inertia, the fully loaded vessel had a stopping distance of approximately 5.5 miles (9 km) from full speed and a turning circle of roughly 2 miles (3 km).
- Propulsion: The ship was powered by a single steam turbine.
- Structural Resilience: Its ability to be salvaged and repaired after suffering significant war damage underscored its robust construction.
- Operational Limitations: The extreme draft and length restricted its routes, making it an exclusive deep-water operator.
Related Topics
- Ultra Large Crude Carrier (ULCC)
- Supertanker
- Oil transportation
- Maritime history
- Shipbreaking industry
- Largest ships in the world