Why doesn't the tanker sink when loaded with thousands of tons of oil?

The tanker doesn't sink when loaded with thousands of tons of oil because it is designed with a hull that displaces a volume of water equal to its total weight, including the oil. This principle, known as buoyancy, allows the ship to float as long as the weight of the water displaced is greater than or equal to the weight of the tanker and its cargo. Additionally, tankers are engineered with specific dimensions and stability features to ensure they can carry heavy loads without compromising their buoyancy.