The ship of the line

The ship of the line is a ship used for war it fights in a way called line of battle the line of battle is when two long lines of ships fight each other to win it mostly depends on which fleet has bigger , stronger and more guns so ship of the lines were just like that and won most line battles after steam was invented the ship of the line stopped using sails and started to use propellers but. They fought in the same way . After the ironclad was invented the ship of the line became obsolete