U-10 class submarine

SM U-10, the class leader of the U-10 class
Class overview
Builders:	Germaniawerft, Kiel (1) AG Weser, Bremen (4)
Operators:	Austro-Hungarian Navy
Preceded by:	U-7-class submarine
Succeeded by:	U-14-class submarine
Built:	1914–1915
In commission:	1915–1918
Completed:	5
Lost:	1
Preserved:	0
General characteristics
Type:	submarine
Displacement:	127 tonnes (125 long tons) surfaced 141 tonnes (139 long tons) submerged
Length:	27.88 m (91 ft 6 in) (o/a) 23.62 m (77 ft 6 in) pressure hull to 92 ft 2 in (28.09 m)
Beam:	3.15 m (10 ft 4 in)
Draught:	3.03 m (9 ft 11 in)
Propulsion:	1 × shaft 1 × diesel engine, 60 bhp (45 kW) 1 × electric motor, 120 shp (89 kW)
Speed:	6.5 knots (12.0 km/h; 7.5 mph) surfaced 5.5 knots (10.2 km/h; 6.3 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
Complement:	17
Armament:	2 × 45 cm (17.7 in) torpedo tubes (both in front); 2 torpedoes

The U-10 class was a class of five submarines or U-boats of the Austro-Hungarian Navy (German: Kaiserliche und Königliche Kriegsmarine or K.u.K. Kriegsmarine) during World War I. The class was similar to the German Type UB I submarine of the German Imperial Navy (German: Kaiserliche Marine); the first two boats delivered to Austria-Hungary had previously been commissioned in Kaiserliche Marine.

The U-10 class as a whole did not have much wartime success, with three of the boats sinking either one or no ships. Only one boat, U-15 sank more than 1,000 gross register tons (GRT) of enemy ships. Of the five submarines of the class, only U-16 was sunk during the war; the remaining four were delivered as war reparations and broken up by 1920.

The Austro-Hungarian Navy's U-boat fleet at the beginning of World War I consisted of six largely experimental submarines, two of which were not operational. The Navy did have five U-7-class submarines under construction in Germany, but a perceived inability to sail the completed submarines past Gibraltar to Pola led to a hasty decision to sell them to Germany, a severe setback for Austria-Hungary's U-boat fleet.