🌐EnglishEnglishDeutschFrançaisPolskiTiếng ViệtРусскийالعربيةفارسی中文EntityQ554487· pop 12· linked from 83 articlesU-21Also known as German submarine U-211936 Type IIB submarineOn the mapAvailable in 12 languagesFrançaisDeutsch中文РусскийالعربيةPolskiSerbianSlovenianTiếng ViệtUkrainianفارسیConnectionsType II submarineEntitygross register tonnageEntityCategories1936 shipsGerman Type II submarinesGrounded U-boatsMaritime incidents in March 1940Ships built in KielU-boats commissioned in 1936World War II submarines of Germany