SM UB-10

UB-10 was identical in design to UB-15 (shown here in service as the Austro-Hungarian U-11)
History
German Empire
Name	UB-10
Ordered	15 October 1914[1]
Builder	AG Weser, Bremen[3]
Yard number	219[1]
Laid down	7 November 1914[1]
Launched	20 February 1915[1]
Commissioned	15 March 1915[1]
Decommissioned	12 September 1918[2]
Fate	Scuttled off Flanders on 5 October 1918[1]
General characteristics [4]
Class and type	Type UB I submarine
Displacement	127 t (125 long tons), surfaced 141 t (139 long tons), submerged
Length	27.88 m (91 ft 6 in) (o/a)
Beam	3.15 m (10 ft 4 in)
Draft	3.03 m (9 ft 11 in)
Propulsion	1 × propeller shaft 1 × Körting 4-cylinder diesel engine, 60 PS (44 kW) 1 × Siemens-Schuckert electric motor, 120 PS (88 kW)
Speed	7.45 knots (13.80 km/h; 8.57 mph), surfaced 6.24 knots (11.56 km/h; 7.18 mph), submerged
Range	1,500 nmi (2,800 km; 1,700 mi) at 5 knots (9.3 km/h; 5.8 mph) surfaced 45 nmi (83 km; 52 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth	50 metres (160 ft)
Complement	14
Armament	2 × 45 cm (17.7 in) bow torpedo tubes 2 × torpedoes 1 × 8 mm (0.31 in) machine gun
Notes	33-second diving time
Service record
Part of:	Flanders Flotilla[1] 27 March 1915 – 5 October 1918
Commanders:	Oblt. Otto Steinbrinck 13 March 1915 – 12 January 1916[1] Oblt. Reinhold Saltzwedel 13 January – 18 June 1916 Oblt. Gustav Buch 19 June – 11 September 1916 Oblt. Wilhelm Amberger 12 September – 13 November 1916 Oblt. Erich von Rohrscheidt 14 November 1916 – 7 January 1917 Oblt. Ulrich Pilzecker 8 January – 12 February 1917 Oblt. Matthias Graf von Schmettow 13 February – 2 March 1917 Oblt. Erich von Rohrscheidt 3 March – 31 May 1917 Oblt. Georg Reimarus 1 June – 6 July 1917 Oblt. Fritz Gregor 7 July – 7 September 1917 Oblt. Helmut Lorenz 8 September – 16 October 1917 Oblt. Erich Stephan 17–27 October 1917 Oblt. Freiherr Cassius von Montigny 28 October – 7 November 1917 Oblt. Erich Stephan 8 November 1917 – 29 January 1918 Oblt. Fritz von Twardowski 30 January – 27 February 1918 Oblt. Hans Joachim Emsmann 28 February – 17 May 1918 Oblt. Willy Stüben 18 May – 5 October 1918
Operations:	115 patrols[1]
Victories:	36 merchant ships sunk (22,604 GRT)[1] 1 warship sunk (1,010 tons)

SM UB-10 was a German Type UB I submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I.

UB-10 was ordered in October 1914 and was laid down at the AG Weser shipyard in Bremen in November. UB-10 was a little under 28 metres (92 ft) in length and displaced between 127 and 141 t (125 and 139 long tons), depending on whether surfaced or submerged. She carried two torpedoes for her two bow torpedo tubes and was also armed with a deck-mounted machine gun. UB-10 was broken into sections and shipped by rail to Antwerp for reassembly. She was launched in February 1915 and commissioned as SM UB-10 in March.^{[Note 1]} The U-boat was the first of her class to commence operations when she entered service on 27 March 1915.

UB-10 was the first boat assigned to the Flanders Flotilla, the unit in which she spent her entire career. Her first two commanders were Otto Steinbrinck and Reinhold Saltzwedel, fifth and eleventh, respectively, among the top-scoring German submarine commanders of the war. UB-10 was credited with sinking 37 ships, about two-thirds of them British fishing vessels. The first ship sunk, the neutral Dutch steamer Katwijk, provoked outrage in the Netherlands and helped turn Dutch public opinion against Germany. That sinking was also the impetus behind a renewed effort to avoid attacking neutral ships by U-boats. In a 13-day span in July and August 1915, UB-10 sank 23 ships, and by herself accounted for nearly all of the tonnage sunk by the Flanders Flotilla in the latter month. She was also responsible for sinking the British destroyer HMS Lassoo in August 1916. UB-10 had two close calls with British submarines near the Schouwen Bank off Zeebrugge in 1916 and 1917, but survived both.

By 1918, UB-10 had been converted into a minelayer by the replacement of her torpedo tubes with four mine chutes. UB-10 was seriously damaged in a British air raid on Flanders in July 1918, and was decommissioned in September 1918 in a worn out condition. She was not deemed seaworthy to sail to Germany when the bases in Flanders were being evacuated by the Germans in October 1918 and was scuttled off Zeebrugge in early October.

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