🌐EnglishEnglishDeutschFrançaisPolskiTürkçeالعربيةفارسی한국어中文EntityQ1664713· pop 8· linked from 57 articlesSM UB-31915 Type UB I submarineConnectionsImperial German NavyEntityTurkeyCountryCategories1915 shipsGerman Type UB I submarinesMaritime incidents in 1915Missing U-boats of World War IShips built in KielU-boats commissioned in 1915U-boats lost with all handsU-boats sunk in 1915World War I shipwrecks in the Aegean SeaWorld War I submarines of Germany