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This article is about the ship type. For other uses, see Steamboat (disambiguation).
Steamship of the 1860s
Look out (Transport Steamer) on Tennessee River, ca. 1860 - ca. 1865
S.S. Humboldt Engine Room, illustrated in Harper's New Monthly Magazine, No. XII, May 1851, Vol. II
Finnish steamer — S/S Ukkopekka, Finland.
A steamboat, sometimes called a steamer, is a ship in which the primary method of propulsion is steam power, typically driving propellers or paddlewheels. Steamboats sometimes use the prefix designation SS, S.S. or S/S (for 'Steam Ship') , however these designations are most often used for Steamships.
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, usually ocean-going, capable of carrying a (ship's) boat. The S.S. Humboldt engine room, to the right, is a concept drawing during the construction of the ship. The term steam wheeler is archaic and rarely used. In England, "steam packet", after its sailing predecessor, was the usual term; even "steam barge" could be used.[notes 1] The French transatlantic steamer SS La Touraine was probably the last of her type to be equipped with sails,[citation needed] although she never used them. Steamships in turn were overtaken by diesel-driven ships in the second half of the 20th century. Most warships used steam propulsion from the 1860s until the advent of the gas turbine in the early 20th