Akihisa Sato, an engineer with Zeniya Kaiyo Service, the dock's Tokyo-based manufacturer, said the docks were used for loading fish onto trucks. One of them turned up several weeks later on an island south of Misawa, but the other two are still missing.
Sen. Ron Wyden, D-Ore., called on the National Oceanic and Atmospheric Administration to redouble its efforts to track the debris, saying something as big as the dock could pose a danger to ships at sea.
Credit: AP Photo/Rick Bowmer