The oil tanker Jahre Viking is the biggest ship ever built. It is known by many names like Mont, Knock Nevis, Happy Giant and Seawise Giant. This is the ULCC KNOCK NEVIS. Her final name was MONT, the name given to her for her final voyage from the Middle East to India. Her displacement was 646,642 long tons or 724,239 short tons when fully laden.She has recorded the greatest deadweight tonnage ever.

Seawise Giant was ordered by a Greek Shipping magnate and delivered by Sumitomo heavy Industries ltd in 1979. It was made at their Oppama shipyard in Yokosuka, Kanagawa, Japan. The Greek shipping magnate went bankrupt shortly thereafter and refused to take delivery. After that she was sold to the Hong Kong owner, Orient Overseas Container Line, who promptly increased her length even more. At first, she operated between the Middle East and the USA but from about 1986 she was used as a floating storage ship and transhipment terminal in Iran during the Iran-Iraq War. In May, 1988, the ship was attacked and heavily damaged by bombs dropped from Iraqi jets while lying at the Iranian Hormuz terminal in the Strait of Hormuz.

Jahre Viking

She gained a second life and a full restoration! The Seawise Giant or what remained of her, was bought by a Norwegian company, re-floated, and towed to the Keppel shipyard in Singapore. After major conversions and repairs she was relaunched in 1991 first as the "Happy Giant". From 1991 to 2004, She was owned by Loki Stream AS and flew the Norwegian flag after Jørgen Jahre bought the tanker for US$39 million in 1991 and renamed her Jahre Viking. She was converted into a permanently moored storage tanker in the Qatar Al Shaheen oil field in the Persian Gulf after it was purchased by First Olsen Tankers Pte. Ltd. in 2004. They renamed it as Knock Nevis.

She’s seen multiple owners over her lifetime, and ultimately ended up servings as a permanently moored floating storage platform at the Qatar Al Shaheen oil field in the Persian Gulf. The vessel was then sold to Indian shipbreakers, and renamed Mont for her final journey in December 2009. After clearing Indian customs, she was sailed to, and intentionally reached at Alang, Gujarat, India for demolition

Seawise Giant was the longest ship ever constructed, longer than the height of many of the world's tallest buildings. According to her captain, S. K. Mohan, she could reach up to 16.5 knots (30.6 km/h) in good weather, it took 5.5 miles (8.9 km) to stop from that speed, and her turning circle in clear weather was about 2 mi (3.2 km).