SM UB-45, a u-boat similar to UB-27
|Ordered:||30 April 1915|
|Builder:||AG Weser, Bremen|
|Cost:||1,291,000 German Papiermark|
|Launched:||10 February 1916|
|Commissioned:||23 February 1916|
|Fate:||sunk by British warship on 29 July 1917|
|General characteristics |
|Class and type:||German Type UB II submarine|
|Draught:||3.66 m (12 ft)|
|Test depth:||50 m (160 ft)|
|Complement:||2 officers, 21 men|
|Notes:||30-second diving time|
SM UB-27 was a German Type UB II submarine 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.[Note 1] UB-27 sank 11 ships in 17 patrols for a total of 18,091 gross register tons (GRT).
A German Type UB II submarine, UB-27 had a displacement of 265 tonnes (261 long tons) when at the surface and 291 tonnes (286 long tons) while submerged. She had a total length of 36.13 m (118 ft 6 in), a beam of 4.36 m (14 ft 4 in), and a draught of 3.66 m (12 ft 0 in). The submarine was powered by two Benz six-cylinder diesel engines producing a total 270 metric horsepower (270 shp; 200 kW), two Siemens-Schuckert electric motors producing 280 metric horsepower (210 kW; 280 shp), and one propeller shaft. She was capable of operating at depths of up to 50 metres (160 ft).
The submarine had a maximum surface speed of 8.90 knots (16.48 km/h; 10.24 mph) and a maximum submerged speed of 5.72 knots (10.59 km/h; 6.58 mph). When submerged, she could operate for 45 nautical miles (83 km; 52 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 7,200 nautical miles (13,300 km; 8,300 mi) at 5 knots (9.3 km/h; 5.8 mph). UB-26 was fitted with two 50 centimetres (20 in) torpedo tubes, four torpedoes, and one 5 cm (2.0 in) 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 15 nautical miles (28 km; 17 mi) south-east of Souter Point near Whitburn, County Durham, UB-27 opened with her deck gun fire at SS Wandle, an 889 GRT "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. HMS Halcyon 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 Coordinates: .
Summary of raiding history
|28 April 1916||Blessing||United Kingdom||19||Sunk|
|28 April 1916||Christian||Denmark||227||Damaged|
|29 April 1916||Teal||United Kingdom||766||Sunk|
|29 April 1916||Wandle||United Kingdom||889||Damaged|
|30 April 1916||Mod||Norway||664||Sunk|
|1 May 1916||Rio Branco||Brazil||2,258||Sunk|
|2 May 1916||Mars||Norway||581||Sunk|
|2 May 1916||Memento||Norway||654||Sunk|
|2 May 1916||Superb||Norway||770||Sunk|
|25 August 1916||Duke of Albany||Royal Navy||1,997||Sunk|
|27 August 1916||Skjaereg||Norway||1,019||Captured as a prize|
|7 October 1916||Jupiter||United Kingdom||2,124||Damaged|
|8 October 1916||Magnus||United Kingdom||154||Sunk|
|12 March 1917||Thode Fagelund||Norway||4,352||Sunk|
|14 March 1917||Davanger||Norway||5,876||Sunk|
- Rössler 1979, p. 54.
- Gröner 1991, pp. 23-25.
- Helgason, Guðmundur. "WWI U-boat commanders: Victor Dieckmann (Royal House Order of Hohenzollern)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 29 January 2015.
- Helgason, Guðmundur. "WWI U-boat commanders: Hans Georg Lübbe". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 29 January 2015.
- Helgason, Guðmundur. "WWI U-boat commanders: Freiherr Heinz von Stein zu Lausnitz". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 29 January 2015.
- Bendert 2000, p. 195.
- Helgason, Guðmundur. "Ships hit during WWI: Wandle". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 18 June 2011.
- "Wandsworth and District Gas Company". Access to Archives. The National Archives. Retrieved 18 June 2011.
- Central Office of Information; for Ministry of Transport (1947). British Coaster: The Official Story. London: His Majesty's Stationery Office. pp. 53–54.
- Helgason, Guðmundur. "Ships hit by UB 27". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 29 January 2015.
- Bendert, Harald (2000). Die UB-Boote der Kaiserlichen Marine, 1914-1918. Einsätze, Erfolge, Schicksal (in German). Hamburg: Verlag E.S. Mittler & Sohn GmbH. ISBN 3-8132-0713-7.
- Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.
- Rössler, Eberhard (1979). U-Bootbau bis Ende des 1. Weltkrieges, Konstruktionen für das Ausland und die Jahre 1935 – 1945. Die deutschen U-Boote und ihre Werften (in German). I. Munich: Bernard & Graefe. ISBN 3-7637-5213-7.