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(also ''Ryō Un Maru''〔) was a Japanese fishing boat that was washed away from its mooring in Aomori Prefecture by the March 2011 Tōhoku earthquake and tsunami and drifted across the Pacific Ocean. It was spotted a year later by a routine Royal Canadian Air Force air patrol about off the coast of Haida Gwaii, British Columbia.〔 The unmanned hulk entered U.S. waters on 1 April 2012 and was fired upon and sunk on 5 April 2012. ==History== The ''Ryou-Un Maru'', a fishing vessel in the Japanese merchant fleet, was originally built around 1982. It was owned by a Hokkaido-based fishing company and was used for shrimping or squidding.〔 After a long service career the ship's owner decided it was too old for continued use and moored it in Aomori Prefecture in Honshu pending sale.〔 When the Tōhoku earthquake and tsunami struck in March 2011, ''Ryou-Un Maru'' broke free and was set adrift.〔 Japanese law requires a ship be disposed of or dismantled properly before allowing its registration to be canceled. However, all parties assumed the vessel sank in the disaster, so the Japan Coast Guard granted the owner an exception.〔 For over a year the ''Ryou-Un Maru'' drifted across the Pacific as a ghost ship. On 20 March 2012, it was spotted in Canadian waters by Royal Canadian Air Force CP-140 Aurora aircraft. As its registration had been canceled, the ship no longer had a legal owner responsible for it. On 4 April 2012, the U.S. Coast Guard dropped a tracking buoy aboard as the vessel drifted approximately southwest of Sitka, Alaska. The next day, the crew of the U.S. Coast Guard Cutter assessed the ship's condition. On 5 April 2012, the Canadian fishing vessel ''Bernice C'' attempted to salvage the stricken vessel,〔 but a ruptured fuel tank proved impossible to pump out and a tow failed.〔CBC News, "The National", airdate: 5 April 2012.〕 The U.S. Coast Guard then determined that sinking the abandoned vessel was necessary to prevent it running aground or becoming a hazard to navigation.〔 The ''Anacapa'' fired upon it with a Mk 38 25mm autocannon, holing and sinking the ''Ryou-Un Maru'' in approximately of water in the Gulf of Alaska off the coast of the Alaskan Panhandle.〔 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「Ryou-Un Maru」の詳細全文を読む スポンサード リンク
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