SM ''UB-27'' was a German Type UB II

submarine A submarine (or sub) is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term is also sometimes used historically or colloquially to refer to remotely op ...

or U-boat in the German Imperial Navy (german: Kaiserliche Marine) 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''."SM" stands for "Seiner Majestät" ( en, His Majesty's) and combined with the ''U'' for ''Unterseeboot'' would be translated as ''His Majesty's Submarine''. ''UB-27'' sank 11 ships in 17 patrols for a total of .

Design

Type UB II submarine The UB II type submarine was a class of U-boat built during World War I by the German Imperial Navy. They were enlarged from the preceding type UB I and were more effective vessels. The boats were a single hull design with a 50-metre maximum d ...

, ''UB-27'' had a displacement of when at the surface and while submerged. She had a total length of , a

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of , and a draught of . The submarine was powered by two

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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.

Service history

On 29 April 1916 in the North Sea about south-east of Souter Point near Whitburn,

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, ''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 .

Summary of raiding history

Notes

References

Bibliography

* * * {{DEFAULTSORT:Ub027 1916 ships Ships built in Bremen (state) World War I submarines of Germany German Type UB II submarines U-boats commissioned in 1916 Maritime incidents in 1917 U-boats sunk in 1917 U-boats sunk by depth charges U-boats sunk by British warships World War I shipwrecks in the North Sea Submarines lost with all hands