Ryou-Un Maru
Ryou-Un Maru adrift near Alaska, 4 April 2012
History
Japan
NameRyou-Un Maru
Port of registryJapan
Launchedc. 1982
Out of serviceMarch 2011
FateDamaged and sent adrift by tsunami in Japan, later sunk by naval artillery in Alaska
General characteristics
TypeSquid fishing boat
Tonnage150 tons
Length45 m (148 ft)[1]
Propulsionmotor (diesel)

Ryou-Un Maru (漁運丸, Fishing Luck) (also Ryō Un Maru[2]) 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.[1] It was spotted a year later by a routine Royal Canadian Air Force air patrol about 150 nautical miles (280 km; 170 mi) off the coast of Haida Gwaii, British Columbia.[3][4] The unmanned hulk entered U.S. waters on 1 April 2012, and, after salvage attempts failed, was sunk by the U.S. Coast Guard on 5 April 2012 to prevent the hulk from becoming a hazard to navigation.[5]

History

The USCG directs streams of water at the Japanese vessel in Gulf of Alaska after it was shelled by the Anacapa. Holes from the shelling are clearly visible in the side of the fishing boat.

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.[6] 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.[5]

Like most countries, 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 and was carried eastward by the Kuroshio Current.[7] 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 170 nautical miles (310 km; 200 mi) southwest of Sitka, Alaska.[2] The next day, the crew of the U.S. Coast Guard Cutter Anacapa assessed the ship's condition.[8]

On 5 April 2012, the Canadian fishing vessel Bernice C attempted to salvage the stricken vessel,[5] but a ruptured fuel tank proved impossible to pump out and a tow failed.[9][10] 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.[5] USCGC Anacapa fired upon it with a Mk 38 25mm autocannon, holing and sinking the Ryou-Un Maru in approximately 1,800-metre (6,000 ft) of water in the Gulf of Alaska 180 miles (290 km) off the coast of the Alaskan Panhandle.[5][11]

References

Public Domain This article incorporates public domain material from websites or documents of the U.S. Coast Guard.

  1. 1 2 カナダ、漁船漂流で警戒呼び掛け 函館の男性「沈んだかと」 (in Japanese). Hokkaido Shimbun Press. 25 March 2012. Retrieved 1 April 2012.
  2. 1 2 "Multimedia Release: Coast Guard overflight reconfirms position of unmanned Japanese vessel" (Press release). U.S. Coast Guard, 17th District Public Affairs. 4 April 2012. Archived from the original on 7 April 2012. Retrieved 5 April 2012.
  3. ↑ "'The ship proves that it's coming'". The Province. 26 March 2012. Archived from the original on 24 April 2012. Retrieved 18 April 2012.
  4. ↑ "Japanese boat washed away in tsunami spotted more than a year later". CNN. 24 March 2012. Retrieved 1 April 2012.
  5. 1 2 3 4 5 "Coast Guard cannon fire sinks Japanese ghost ship damaged in tsunami". New York Daily News. 6 April 2012. Retrieved 6 April 2012.
  6. ↑ "US Coast Guard sinks tsunami 'ghost ship'". bbc.co.uk. BBC. 5 April 2012. Retrieved 16 April 2012.
  7. ↑ Dunne, Aidan (June 14, 2016). "Visual art: A Japanese ghost ship drops anchor in Dublin". The Irish Times. Retrieved November 7, 2022.
  8. ↑ "U.S. Coast Guard to sink Japanese boat washed away by tsunami". CNN. 5 April 2012. Retrieved 5 April 2012.
  9. ↑ CBC News, "The National", airdate: 5 April 2012.
  10. ↑ "Coast Guard cannons sink Japanese ghost ship drifting since last year's tsunami". Washington Post. 5 April 2012. Retrieved 6 April 2012.
  11. ↑ Bouzane, Bradley; Ward, Doug (5 April 2012). "Japanese 'ghost ship' sinks near Alaska". Edmonton Journal. Retrieved 6 April 2012.
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