EntityQ877673· pop 9· linked from 29 articlesSM U-23Sign in to saveGerman SubmarineConnectionsgross register tonnageEntityNorwayCountryUnited KingdomCountryDenmarkConceptWorld War IConceptgeographic coordinate systemEntityInternational Standard Book NumberEntityKielEntityGerman EmpireEntityShetland IslandsEntitytonneEntitytorpedoEntitydiesel engineEntitynautical mileEntitybowEntitysternEntityU-boatEntityImperial German NavyEntityFair IsleEntitytorpedo tubeEntityCategories1912 ships1915 in ScotlandFair IsleHistory of ShetlandMaritime incidents in 1915Ship infoboxes without an imageShips built in KielShipwrecks of ScotlandType U 23 submarinesU-boats commissioned in 1913U-boats sunk by British submarinesU-boats sunk in 1915World War I shipwrecks in the Atlantic Ocean