🌐EnglishEnglishFrançaisItalianoPolskiالعربيةفارسی中文EntityQ16222794· pop 7· linked from 133 articlesSM UB-551917 Type UB III submarineConnectionsgross register tonnageEntityFlanders U-boat flotillasEntityCategories1917 shipsGerman Type UB III submarinesMaritime incidents in 1918Ships built in Bremen (state)U-boats commissioned in 1917U-boats sunk by minesU-boats sunk in 1918World War I shipwrecks in the English ChannelWorld War I submarines of Germany