german type submarine boat german_imperial_navy german kaiserliche_marine world war ordered october laid shipyard bremen november little metres length displaced tonnes long tons depending surfaced submerged carried torpedoes bow torpedo tubes armed deck mounted machine gun launched commissioned february commanding officer commissioning remained charge ship week sources report commanding officers assigned end war clear submarine remained commission reported use training vessel kiel september boat war patrols sank ships war indicate vessel remained training role end war deemed unable surrender rest germany boat fleet remained germany broken design construction german_army rapid advance north_sea coast earliest stages world war german_imperial_navy found suitable submarines operated narrow shallow seas flanders project design effort begun mid august produced type design small submarine shipped rail port operations quickly assembled constrained railroad size limitations design called boat metres long displacing tonnes long tons torpedo tubes initial seven submarines numbered ordered october shy months planning class began laid bremen november built metres long metres draft metres single brake horsepower cylinder diesel engine surface travel single shaft horsepower electric motor underwater travel attached single propeller shaft speeds knots mph surfaced knots mph submerged moderate speeds sail nautical miles surface nautical miles submerged batteries like boats class rated diving depth metres completely seconds armed centimeter torpedoes bow torpedo tubes outfitted single millimeter machine gun deck standard complement consisted officer thirteen enlisted men work complete yard launched february career submarine commissioned german_imperial_navy february command year old time boat commander command days sources indicate succeeded commander remained commission according authors assigned september reports undertook war patrols successes enemy ships indicate vessel remained use training vessel end war allies required german boats sailed surrender boats deemed allowed remain germany broken
SM UB-9