How do ships use Archimedes principle?

Answer 1

Archimedes principle led to the Plimsoll Line, which is marks painted near the bows of a ship. Basically, a ship on salt water floats higher and can carry more cargo. While a ship on fresh water will float lower and can safely carry less cargo. Samual Plimsoll introduced the Plimsoll Line to solved the hazard of capsizing posed by overloading a ship.