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Countries that manage Antarctica are calling for limits on the number of tourist ships, for fortified hulls that can withstand sea ice and for a ban on the use of so-called heavy oils.

各个国家对于南极洲要求对于游览船只的限制采取了措施，一个是对抗海冰的船体外壳加固，另一个是禁止重油船。

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Both ships were strengthened after the Titanic disaster with double hulls and taller bulkheads, but their rivets were never changed.

泰坦尼克号沉没之后，奥林匹克号和不列颠尼克号被加厚了船板并升高了防水隔舱壁。 但他们的铆钉被没有被更换。

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Archaeologists have found tacks which would have been used to nail lead on to the hulls of ships inside one of the bays.

BBC: Roman shipyard found by British archaeologists

An employee at Ishikawajima-Harima Heavy Industries, one of Japan's oldest shipbuilders, he is responsible for bending a precise curve into the giant steel plates that make up the hulls of seagoing ships.

CNN: ASIANOW - TIME Asia | GizmoLand! | Man Beats Machine

While oil does not damage ocean-going vessels, it will cling to their hulls, and it is illegal for ships to enter U.S. ports or waterways if they will contaminate the waters.

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