were swept from their moorings by the tsunami. the other tanks were washed away by the waves. oil from the tanks spreads across the surface of the bay. the tanks were fixed in place to prevent damage from earthquakes or strong winds. but the tsunami submerged the half-full tanks causing them to break their moorings and float upwards. >> translator: if there is enough liquid inside, the tanks will not float. but if they are only half or a third full, it's almost impossible to prevent them from floating. >> there are old tanks in seaside locations all around japan. many of which could be similarly affected by a tsunami. a tsunami off the indonesian island of sumatra in 2004 washed away oil tanks that were lined upd on shore. japan's disaster management agency responded by setting up a committee to study measures to prevent such occurrences and submitted a report in 2009. a panel concluded that if the largest possible tsunami occurred, oil tanks could be inundated to height of 4.4 meters but they would only move sideways and would not come loose or float away. no sif they measures we
moored at the south street seaport in new york. what's the significance of a ship like this to the development of new york? >> well, ships like this were cargo ships. this is where the goods came off of these ships, were unloaded by stevedores and carters on the docks, hauled into the counting houses and the warehouses in new york. this entire street along the water was a street of ships. it was a forest of sails and masts. there were hundreds, if not thousands of ships coming and going in and out of new york. and that's what enabled new york to grow so rapidly and enabled the country to grow the way it is. >> sounds like these sailors had important jobs, but i'm glad it wasn't me. it may not be as adventurous, but flipping burgers and babysitting seems a whole lot safer. from the pekiat the south street seaport, i'm erika for "teen kids news." >> that wraps up our show, but we'll be back soon with more "teen kids news." >> thanks for joining us, and have a great week.
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