What is a Steamship?
A steamboat or steamship, sometimes called a steamer, is a ship in which the primary method of propulsion is steam power, typically driving propellers or paddlewheels. The term steamboat is usually used to refer to smaller steam-powered boats working on lakes and rivers, particularly riverboats; steamship generally refers to larger steam-powered ships which are usually ocean-going. The term steamwheeler is archaic and rarely used. Steamships gradually replaced sailing ships for commercial shipping through the 19th century and in turn were overtaken by diesel-driven ships in the second half of the twentieth century. Most warships used steam propulsion until the advent of the gas turbine. Today, nuclear-powered warships and submarines use steam to drive turbines, but are not referred to as steamships or steamboats. Screw-driven steamships generally carry the ship prefix “SS” before their names, meaning ‘Steam Ship’ (or Screw Steamer, or ‘screw-driven steamship’), paddle steamers usually
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