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''Ocean Ranger'' was a semi-submersible mobile offshore drilling unit that sank in Canadian waters on 15 February 1982. It was drilling an exploration well on the Grand Banks of Newfoundland, east of St. John's, Newfoundland, for Mobil Oil of Canada, Ltd. (MOCAN) with 84 crew members on board when it sank. There were no survivors. ==History and design== ''Ocean Ranger'' was designed and owned by Ocean Drilling and Exploration Company, Inc. (ODECO) of New Orleans. The vessel was a self-propelled large semi-submersible design with a drilling facility and living quarters. It was capable of operation beneath of ocean water and could drill to a maximum depth of . It was described by ODECO as the world's largest semi-submersible oil rig to date. Constructed for ODECO in 1976 by Mitsubishi Heavy Industries in Hiroshima, Japan, ''Ocean Ranger'' was long, wide, and high. It had twelve anchors.〔 〕 The weight was 25,000 tons. It was floating on two long pontoons that rested below the surface.〔 〕 The vessel was approved for 'unrestricted ocean operations' and designed to withstand extremely harsh conditions at sea, including winds and waves. Prior to moving to the Grand Banks area in November 1980, it had operated off the coasts of Alaska, New Jersey and Ireland. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ocean Ranger」の詳細全文を読む スポンサード リンク
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