Double Hulled Tanker

Double hulled ships are ships that have two hulls instead of one . These are good because if the boat crashes there will still be a hull left to prevent leaks. Some people do not like this because it is expensive but this is good for the environment. If the Exxon Valdez had a double hulled boat there would never have been an oil spill would there? That tiny little addition would have saved a lot of animals that are now dead.