Seawise Giant

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Seawise Giant, later the Happy Giant, Jahre Viking, and Knock Nevis, was a ULCC supertanker and the longest ship ever built, and possessed the greatest deadweight tonnage ever recorded. Fully laden, her displacement was 657,019 tonnes, the heaviest ship of any kind, and and with a draft of 24.6 m (81 ft), she was incapable of navigating the English Channel, the Suez Canal or the Panama Canal. Overall, she was generally considered the largest ship ever built, as well as the largest mobile man made object ever built.