SM UC-69

SM UC-69 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 12 January 1916 and was launched on 7 August 1916. She was commissioned into the German Imperial Navy on 22 December 1916 as SM UC-69. In nine patrols UC-69 was credited with sinking 54 ships, either by torpedo or by mines laid. UC-69 was sunk after being accidentally rammed by near Barfleur on 6 December 1917. The wreck was accidentally discovered in November 2017 by the Dutch naval mine sweeper Zr.Ms. Makkum which was mapping the sea-bed off the French Normandy coast.

Design

A Type UC II submarine, UC-69 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, two electric motors producing, and two propeller shafts. She had a dive time of 48 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-69 was fitted with six mine tubes, eighteen UC 200 mines, three torpedo tubes, seven torpedoes, and one Uk L/30 deck gun. Her complement was twenty-six crew members.