german type submarine boat german_imperial_navy german kaiserliche_marine world war submarine interned running aground neutral dutch waters scuttled crew ordered october laid shipyard kiel november little metres length displaced tonnes long tons depending surfaced submerged carried torpedoes bow torpedo tubes armed deck mounted machine gun broken sections shipped rail antwerp launched march commissioned april spent entire career sank warship credited flotilla september boat accounted fourteen additional ships sunk ships damaged ship seized prize march ran aground near netherlands navigational error commander submarine crew interned neutral country taken days later scuttled crew remained interned rest war wreck ceded france broken brest july 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 submarines numbered ordered october shy months planning class began laid kiel 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 centimeter deck gun standard complement consisted officer thirteen enlisted men work complete yard rail shipment process shipping boat involved breaking submarine essentially knock kit boat broken approximately pieces loaded railway early sections shipped antwerp assembly typically week process assembled launched march loaded barge taken canals underwent trials early career submarine commissioned german_imperial_navy april command year old time boat commander april joined boats comprising flanders flotilla german des organized march joined flotilla germany midst submarine offensive begun february campaign enemy vessels german defined war zone german encompassed waters united_kingdom sunk vessels neutral countries attacked definitively identified enemy vessels operating false flag boats flanders flotilla initially limited patrols southern portion north_sea united_kingdom netherlands sortie sunk ship flotilla april sank warship credited flotilla spotted old royal_navy destroyers recruit nautical miles southwest light vessel noon launched torpedo hit recruit split long ton displacement ship half killing men men rescued month later june sank largest ship british cargo ship gross register tons grt route hull alexandria load sank mouth thames crewmen lost lives attack late june head flanders flotilla test theory british defenses anti submarine nets mines evening june departed round trip sailed past surface early morning 22nd having crash dive voyage discovered british destroyer immediately return trip arrived safely later day boats soon followed patrols channel bad weather fog hampered boats success ships sunk successfully completing submarines helped prove feasibility defeating british july patrolling nautical miles attacked british fishing vessels sinking sunken ships sailing vessels traditionally rigged red sails stopped boarded crewmen sunk explosives weeks later torpedoed sank ton nautical miles sank ton august germany submarine offensive suspended september chief admiral response american demands sinking line steamer high profile august september directive ordered boats south western approaches required submarine activity north_sea conducted strictly prize regulations months sink ship mid november succeeded commander boat command year old command sank vessel january ton crystal boarded sunk explosives nautical miles southeast 27th second submarine offensive early british blockade germany beginning effect germany imports royal_navy stopped seized cargo destined germany quantity cargo sunk german boats submarine offensive result german_imperial_navy began second offensive merchant shipping february final ground rules agreed enemy vessels germany self proclaimed war zone destroyed warning enemy vessels outside war zone destroyed armed avoid united_states enemy passenger attacked regardless war zone attack new offensive came march boat torpedoed swedish ship ask near ton ship route london load timber sink reports casualties damaged ship attack ask followed weeks later sinking swedish ship ton anchor nautical miles torpedoed day march ballast process sailing sent loss life march commander assigned newly commissioned replaced commander submarine sister ships boat career sank tons shipping helm july succeeded year old time boat captain classmate april cadet class near end april admiral newest commander chief german high seas fleet called merchant shipping offensive ordered boats sea return boats port remain end offensive august sink ships months grand_fleet ambush attempts mid completed plans draw german high seas fleet sortie raid british fleet nests submarines fields support operation flanders boats set midnight form line nautical miles east group intercept attack british light forces sortie north join battle unfortunately germans british admiralty intelligence reports departure submarines coupled absence attacks shipping aroused british suspicions delayed departure german fleet sortie failure boats stationed north receive coded message warning british advance caused anticipated ambush complete disappointing failure group sighted forces far away mount attack failure submarine ambush sink british capital ships allowed grand fleet engage numerically inferior high seas fleet battle jutland took place june later august germans set ambush british fleet drew plans high seas fleet raid original intention german fleet planned depart late day august shell military targets morning group intended attack forces boats forming second line boats stationed morning august british intelligence given warning impending attack ambush causing grand_fleet sortie august hours german fleet sailed faulty intelligence caused initially divert eventually operation boats north sank british light cruisers group played action september patrolling torpedoed ton norwegian steamer general cargo london casualties patrolling area 23rd sank belgian following day dutch ship seized prize sailed prize crew success command assigned command newly commissioned submarine january member april cadet class replaced submarine warfare british blockade germany prevented neutral shipping reaching german ports severely limited imports food fuel germany results increase infant mortality deaths attributed starvation war blockade having dire consequences personally approved resumption submarine warfare begin february help force british peace new rules engagement specified ship left afloat march departed patrol mass days later entered dutch territorial waters navigational error ran aground mouth netherlands neutral war leave dutch territorial waters hours required international law submarine crew interned dutch germans protested grounding merely result error distress dutch release submarine taken port march crew scuttled crew interned duration war end war wreck surrendered france taken brest broken july summary raiding history
SM UB-6