EntityQ2207369· pop 7· linked from 53 articlesSM U-81Sign in to savesubmarine of the German Imperial NavyConnectionsmetric horsepowerEntitygross register tonnageEntityNorwayCountryUnited KingdomCountrySwedenCountryDenmarkConceptWorld War IConceptgeographic coordinate systemEntityInternational Standard Book NumberEntitysubmarineEntityGerman EmpireEntitywattEntityKingdom of ItalyEntitytonneEntitytorpedoEntityknotEntitynautical mileEntitydraftEntityImperial German NavyEntitydisplacementEntityCategories1916 shipsGerman Type U 81 submarinesMaritime incidents in 1917Ship infoboxes without an imageShips built in KielU-boats commissioned in 1916U-boats sunk by British submarinesU-boats sunk in 1917World War I shipwrecks in the Atlantic OceanWorld War I submarines of Germany