thumb|300px|Painting of a turuma off the fortifications at Sveaborg by A. E. Geete, 1770. A turuma (from the Finnish word "Turunmaa") was a type of warship built for the Swedish archipelago fleet in the late 18th century. It was specifically developed for warfare in the Archipelago Sea and along the coasts of Svealand and Finland. The turuma was designed by the prolific naval architect Fredrik Henrik af Chapman for use in an area of mostly shallow waters and groups of islands and islets that extend from Stockholm all the way to the Gulf of Finland.
thumb|300px|Painting of a turuma off the fortifications at Sveaborg by A. E. Geete, 1770. A turuma (from the Finnish word "Turunmaa") was a type of warship built for the Swedish archipelago fleet in the late 18th century. It was specifically developed for warfare in the Archipelago Sea and along the coasts of Svealand and Finland. The turuma was designed by the prolific naval architect Fredrik Henrik af Chapman for use in an area of mostly shallow waters and groups of islands and islets that extend from Stockholm all the way to the Gulf of Finland.
It was designed to replace the galleys that made up the core of the fleets that operated along the coasts and in the archipelagos of the Baltic Sea. The turuma had a bigger draft, was somewhat slower under oars, but offered superior accommodation for its crew, was more seaworthy and had roughly ten times the number of heavy guns. It could be propelled with either sails or oars and was both smaller and more manoeuvrable than most sailing warships which made it suitable for operations in shallow, confined waters.
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