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
Oil Pollution Act of 1990 limited safeguards against the hazards of oils spills. In 1976, a bill to create a cohesive safe measure for oil pollution was introduced to Congress. Neither the House of Representatives nor the Senate could agree on a single statue and the bill fell out of consideration numerous times. On March 24, 1989, the Exxon Valdez hit aground in the Prince Williams Sound and spilled nearly 11 million gallons of crude oil—the largest marine oil spill in recorded history up to that point. Soon afterward, in June 1989, three smaller spills occurred within coastal waters of the United States. This was