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
Builder:	AG Weser, Bremen
Yard number:	219
Laid down:	7 November 1914
Launched:	20 February 1915
Commissioned:	15 March 1915
Decommissioned:	12 September 1918
Fate:	scuttled off Flanders on 5 October 1918
Service record
Part of:	German Imperial Navy Flanders Flotilla (March 1915 – October 1918)
Commanders:	Otto Steinbrinck (March 1915 – January 1916) Reinhold Saltzwedel (January – June 1916) Gustav Buch (June – September 1916) Wilhelm Amberger (September – November 1916) Erich von Rohrscheidt (November 1916 – January 1917) Ulrich Pilzecker (January–February 1917) Matthias Graf von Schmettow (February – March 1917) Erich von Rohrscheidt (March – May 1917) Georg Reimarus (June – July 1917) Fritz Gregor (July – September 1917) Helmut Lorenz (September – October 1917) Erich Stephan (October 1917) Cassius von Montigny (October – November 1917) Erich Stephan (November 1917 – January 1918) Fritz von Twardowski (January – February 1918) Hans Joachim Emsmann (February – May 1918) Willy Stüben (May – October 1918)
Operations:	115 patrols
Victories:	36 ships (22,604 GRT) sunk 1 warship (1,010 tons displacement) sunk
General characteristics
Class and type:	German 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

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. 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.