The largest ship the world has ever seen is not a passenger liner or a battleship, but an oil tanker!
The largest of the huge oil-carrying ships, called supertankers, is a French vessel that weighs more than half a million tons.
The ship, the Pierre Guillaumat, is 1,359 feet long, more than a quarter of a mile, and can carry over 20 million barrels of oil each year!
