SM UC-39
SM "UC-39" was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy () during World War I. The U-boat was ordered on 20 November 1915 and was launched on 25 June 1916. She was commissioned into the German Imperial Navy on 31 October 1916 as SM "UC-39". In one patrols "UC-39" was credited with sinking 3 ships, either by torpedo or by mines laid. "UC-39" was forced to the surface by a depth charge attack and then sunk by gunfire from the British destroyer off Flamborough Head on 8 February 1917. Seven  crew members died while 17 survived. Design. A German Type UC II submarine, "UC-39" had a displacement of when at the surface and while submerged. She had a length overall of , a beam of , and a draught of . The submarine was powered by two six-cylinder four-stroke diesel engines each producing (a total of ), two electric motors producing , and two propeller shafts. She had a dive time of 35 seconds and was capable of operating at a depth of . The submarine had a maximum surface speed of and a submerged speed of . When submerged, she could operate for at  ; when surfaced, she could travel at . "UC-39" was fitted with six mine tubes, eighteen UC 200 mines, three torpedo tubes (one on the stern and two on the bow), seven torpedoes, and one Uk L/30 deck gun. Her complement was twenty-six crew members.