Home›1917 ships›SM U-23🌐EnglishEnglishFrançaisفارسیEntityQ7391566· pop 5· linked from 38 articlesSM U-23Austro-Hungarian Navy's U-20-class submarineWikidata factsImageUndervandsbåden Havmanden 1914 gs.jpgvia Wikidata · CC0Available in 4 languagesFinnishHungarianفارسیvia Wikidata sitelinks · CC0ConnectionsGermanEntityWorld War IConceptCategories1917 shipsMaritime incidents in 1918Mediterranean articles missing geocoordinate dataShips built in FiumeU-20-class submarinesU-boats commissioned in 1917U-boats lost with all handsU-boats sunk by Italian warshipsU-boats sunk in 1918World War I shipwrecks in the Adriatic SeaWorld War I submarines of Austria-Hungary