german submarine german submarine type boat nazi_germany kriegsmarine ordered germany naval program keel laid bremen november roughly seven months construction launched june formally commissioned kriegsmarine september year career sank vessels total loss gross register tons grt sunk coast june construction design construction ordered nazi_germany kriegsmarine keel laid november bremen yard number launched june commissioned september command design german type submarines slightly larger original german type submarines later designated displacement tonnes long tons surface tonnes long tons submerged boat total length pressure hull length beam height draught submarine powered man stroke cylinder diesel engines producing total metric horsepower shp use surfaced double acting electric motors producing total metric horsepower shp use submerged shafts propellers boat capable operating depths metres submarine maximum surface speed knots mph maximum submerged speed knots mph submerged boat operate nautical miles knots mph surfaced travel nautical miles knots mph fitted torpedo tubes fitted bow stern torpedoes naval gun rounds anti aircraft gun boat complement service history command left kiel december spent days north_sea patrol sank british ship january convoy january totalling grt days later january arrived german occupied port france remain home port rest career left second patrol february underwent day voyage atlantic_ocean directed der marine supreme naval headquarters attack convoy attack sank merchant ship march collectively boats sank total tons convoy sinking march march 21st went score nazi_germany kill coast south_america sank april later patrol sank convoy convoy 13th convoy 15th june convoy second successful boat patrol entire second world war ships sunk total grt deck gun exploded wounding crew members returned june remained august departed war patrol august assigned hammer remained disbanded august reassigned remained disbanding august assigned sank merchant ship montana convoy september returned days later left fourth patrol november spent days north_atlantic november assigned remained december having sunk ships patrol returned december left boat shortly patrol replaced commander january left fifth patrol january sank british warship convoy south west ireland february rescued seven men crashed german miles coast france returned february seventeen days later february left march sank british merchant ship norwegian merchant ship east coast united_states returned april spending days north_atlantic left patrol june crossing attacked australian short aircraft squadron raaf sought shelter spain leave june departed reached 30th attack apparently caused damage sail november period command boat undertake patrols replaced command left patrolling north_atlantic succeeded sinking british merchant ships december january british convoy january american freighter 27th returned february remained march patrol april boat commander promoted sank greek merchant ship miles southwest june passing close attacked sunk flying boat crew members killed summary raiding history sailing vessel
German submarine U-105 (1940)