german type submarine boat german_imperial_navy german kaiserliche_marine world war ordered october laid shipyard bremen november little metres length displaced long tons depending surfaced submerged carried torpedoes bow torpedo tubes armed deck mounted machine gun broken sections shipped rail antwerp launched february commissioned march boat class commence operations entered service march boat assigned flanders flotilla unit spent entire career commanders fifth eleventh respectively scoring german submarine commanders war credited sinking ships thirds british fishing vessels ship sunk neutral dutch steamer provoked outrage netherlands helped turn dutch public opinion germany sinking impetus renewed effort avoid attacking neutral ships boats day span july august sank ships accounted nearly sunk flanders flotilla month responsible sinking british destroyer august close calls british submarines near survived converted replacement torpedo tubes seriously damaged british air raid flanders july decommissioned september worn condition deemed sail germany bases flanders evacuated germans october scuttled early october 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 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 metric horsepower cylinder diesel engine surface travel single metric horsepower double acting 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 meters completely seconds armed centimeter torpedoes bow torpedo tubes outfitted single millimeter machine gun deck 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 february loaded barge taken canals underwent trials early career submarine commissioned german_imperial_navy march command year old march boat begin operations boat attached flanders flotilla german des organized march began operations 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 flotilla april departed patrol soon april sank ship ton dutch steamer nautical miles west killed attack attack neutral ship sailing neutral ports sailing baltimore provoked outrage dutch population sinking dutch ships sharply turned public opinion netherlands germany direct result sinking avoid provoking dutch primarily united_states german government issued order april neutral vessels attacked german government later paid compensation sinking early june sank ship belgian ship carrying load iron ore torpedoed sunk 7th persons board ton ship saved master wife year old daughter mate pilot crewmen perished sister boat pioneered route british anti submarine nets mines june boats flotilla began patrol soon followed patrols channel hampered fog bad weather boats sank ships successfully completing helped prove feasibility defeating british june crew patrolling north_sea busy day sank british fishing vessels ranging gross register tons grt patrolling nautical miles east sunken ships sailing vessels traditionally rigged red sails stopped boarded crewmen sunk explosives august began august capturing burning alert british fishing 1st day ton torpedoed nautical mile crew ship largest victim date saved august captured sank followed sinking largest ship career days later grt headed san_francisco torpedoed nautical miles contemporary news account reported beached apparently damaged crew saved august day sinking crew june activities sinking fishing ships ranged size tons boarded sunk explosives ships august tally tons accounted nearly tons sunk boats month addition counting ships sunk end july sank ships day span nearly half ships sunk flotilla july august end submarine offensive august chief admiral issued orders offensive suspension response american demands german submarines sunk line steamer high profile august september directive ordered boats south western approaches required submarine activity north_sea conducted strictly prize regulations sink ship months december sank ships command ton ton torpedoed casualties men died attack german hospital ship seized english naval forces renamed previous year january succeeded command went command boats war continued successes command fifth scoring german submarine commanders war tally tons shipping credit year old replacement year veteran kaiserliche_marine time boat commander 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 victim new offensive commander came march boat torpedoed ton canadian steamer nautical miles nineteen men ship headed cargo steel lost attack mate pilot crewmen rescued weeks later torpedoed sank norwegian steamer nearly location fourteen men ton cargo ship lost near end april admiral newest commander chief high_seas_fleet called merchant shipping offensive ordered boats sea return boats port remain ships sunk week offensive 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 high seas fleet sortie failure boats stationed north receive coded message warning british advance caused anticipated ambush complete disappointing failure 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 mid june transferred case went scoring boat commanders war placing eleventh list tons credit assigned new commander months end war immediate replacement led boat sinking warship british destroyer august torpedoed sank loss men later august fortunate avoid attack british submarine departing morning august rendezvous bound exchanged information parted company resumed course torpedoed sunk hms submarine warfare early stages war royal_navy blockaded germany preventing neutral shipping reaching german ports time called winter blockade 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 new rules engagement command sank dutch steamer march encountered found derelict badly damaged german destroyers launched coup stricken ship sent nautical miles east northeast returning early april attacked british submarine near area escaped hms previous august waiting gas launched torpedo boat april authors report sank torpedo fact fired explosion noted torpedo prematurely exploding able continue port later month sank dutch ships 24th 25th minister ton steamer headed sent nautical miles sailing ship elizabeth sunk following day august helm sank british vessel nautical miles ton ship sent cargo steel crew second largest sunk early month led boat sinking fishing vessels british unity 5th 6th ships sunk conversion sister boats converted submarines conversion involved removing bow section containing pair torpedo tubes boat replacing new bow containing capable carrying mines process boats lengthened feet displacement increased long tons surface long tons surface exactly conversion performed reported converted late late february mid commanded year old later notable commander boat sunk war namesake 5th boat kriegsmarine world war july seriously damaged heavy british air raid german held bases flanders raids considerable damage harbour facilities delayed repairs impaired flotilla ability operate strength sources indicate damage repaired attack early september boat considered unfit service decommissioned 12th offensive started september allies began drive german lines plans evacuate flanders naval facilities vessels ordered depart flanders germany october unable journey power destroyed boats left october maintenance crew scuttled position ships sunk damaged
SM UB-10