Double-hulled tanker Double-hulled tanker A double-hulled tanker refers to an oil tanker which has a double hull. They reduce the likelihood of leaks occurring than in single-hulled tankers, and their ability to prevent or reduce oil spills led to double hulls being standardized for oil tankers and other types of ships including by the International Convention for the Prevention of Pollution from Ships or MARPOL Convention. After the Exxon Valdez oil spill disaster in Alaska in 1989, the US Government required all new oil tankers built for use between US ports to be equipped with a full double hull. A number of
Exxon Valdez or 257,000 to 750,000 barrels. In 1989, the "Exxon Valdez" oil spill was listed as the 54th largest spill in history. The tanker was 301 meters long, 51 meters wide, 26 meters depth (987 ft x 166 ft x 88 ft), with a deadweight of 214,861 long tons and a full-load displacement of 240,291 long tons. The ship was able to transport up to 235,000 m³ (1.48 million barrels) at a sustained speed of 16.25 knots, powered by a (31,650 shp) diesel engine. Her hull design was of the single-hull type, constructed by National Steel and Shipbuilding Company in San