This article does not cite any sources. (November 2007) (Learn how and when to remove this template message)
A screw sloop is a propeller-driven sloop-of-war. In the 19th century, during the introduction of the steam engine, ships driven by propellers were differentiated from those driven by paddle-wheels by referring to the ship's screws (propellers). Other propeller-driven warships included screw frigates and screw corvettes.