HSwMS Sköld was a small river monitor built for the Swedish Royal Skerry Artillery in the late 1860s. She was equipped with a dual propulsion system, both hand and steam-driven, although the hand-driven portion was removed early in the ship's career due to complaints from the crew. The ship was put into reserve in 1890 and used as a gunnery target in 1907. Design and description In 1865 the Navy Minister, Baltzar J. van Platen, persuaded the Riksdag of the Estates to establish the Royal Skerry Artillery as part of the Swedish Army to defend the inner Swedish waters and protect the flanks of Swedish fortresses. This force was to be equipped with ten small monitors to operate in shallow waters that could navigate the Göta Canal system that linked Gothenburg () on the west coast to Söderköping on the Baltic Sea. HSwMS Sköld was the second of these monitors. She was designed by the inventor John Ericsson and Lieutenant John Christian d'Ailly. Sköld measured long overall and had a beam of . She had a draft of and displaced . Her crew initially numbered 40 officers and men, but it was reduced to 29 when the rowing mechanism was removed early in the ship's career. Skölds most unusual feature was that John Ericsson designed, and had built in New York City, a combined hand and steam propulsion system. Seats for 24 rowers were placed in front of the steam engine and boiler and the rowers used levers and a crank connected to the propeller shaft to turn it fast enough to move the ship at a speed of . The ship also had a single horizontal 2-cylinder steam engine that was powered by a single semi-circular fire-tube boiler. The monitor had a maximum speed under steam of . The ship was briefly armed with a single M/66 smoothbore gun, mounted in a long, fixed, oval-shaped turret, before being rearmed in 1870 with a M/69 rifled breech loader. The M/69 gun weighed and fired projectiles at a muzzle velocity of . At its maximum elevation of 7.5° the gun had a range of . During the late 1870s Sköld received a 10-barreled M/75 machine gun designed by Helge Palmcrantz. The machine gun weighed and had a rate of fire of 500 rounds per minute. Its projectiles had a muzzle velocity of and a maximum range of . Sköld had a