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.

FORBES: The Gulf Spill: Now What?

There was a precedent supporting the Europeans: American green laws insist that ships docking locally be double hulled, even though that forces ship owners to pay for unwanted double hulls on international waters en route to American ports.

ECONOMIST: Planes and pollution