EntityQ819857· pop 7· linked from 71 articlesSM U-61Sign in to saveConnectionsmetric horsepowerEntitygross register tonnageEntityU-boat campaignEntityUnited StatesCountryFranceCountrySpainCountryNorwayCountryUnited KingdomCountryPortugalCountrySwedenCountryDenmarkConceptAtlantic OceanEntityWorld War IConceptInternational Standard Book NumberEntityBremenEntityRussian EmpireCountrysubmarineEntityGerman EmpireEntityBritish IslesEntitywattEntityCategories1916 shipsMaritime incidents in 1918Missing U-boats of World War IShip infoboxes without an imageShips built in Bremen (state)Type U 57 submarinesU-boats commissioned in 1916U-boats sunk by unknown causesU-boats sunk in 1918World War I shipwrecks in the Atlantic OceanWorld War I submarines of Germany