In the 18th-19th century corvettes were three-masted ships with square rigging and carried about 20 guns on the top deck. 在18和19世纪,小型巡防舰是三桅船,装有方帆,在高层甲板装有约二十门大炮。
The Visby Class of stealth corvettes were built for the Swedish Navy by the Swedish company Kockums ( a subsidiary of ThyssenKrupp Marine Systems of Germany). 维斯比级是德国蒂森克虏伯集团下属的瑞典考姆公司为瑞典海军建造的轻型隐身护卫舰。