SM UB-27

SM UB-27 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 30 April 1915 and launched on 10 February 1916. She was commissioned into the German Imperial Navy on 23 February 1916 as SM UB-27. UB-27 sank 11 ships in 17 patrols for a total of.

Design

A Type UB II submarine, UB-27 had a displacement of when at the surface and while submerged. She had a total length of, a beam of, and a draught of. The submarine was powered by two Benz six-cylinder diesel engines producing a total, two Siemens-Schuckert electric motors producing, and one propeller shaft. She was capable of operating at depths of up to.
The submarine had a maximum surface speed of and a maximum submerged speed of. When submerged, she could operate for at ; when surfaced, she could travel at. UB-26 was fitted with two torpedo tubes, four torpedoes, and one SK L/40 deck gun. She had a complement of twenty-one crew members and two officers and a thirty-second dive time.

On 29 April 1916 in the North Sea about south-east of Souter Point near Whitburn, County Durham, UB-27 opened with her deck gun fire at, an "flat-iron" collier of the Wandsworth, Wimbledon and Epsom District Gas Company. The collier engaged the submarine and survived. Afterwards in Britain it was believed Wandle had sunk UB-27 and the master, G.E.A. Mastin, and his crew were celebrated.
UB-27 disappeared after 22 July 1917. reported ramming and depth charging a U-boat on 29 July 1917. A postwar German study concluded that it was possible that Halcyon sank UB-27 at.