'' 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 , 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
2011 Tōhoku earthquake and tsunami
2011 Tōhoku earthquake and tsunami
Ryou-Un Maru