SM U-1 (Austria-Hungary)

U-1 departs the harbor at Pula in 1914
History
Austria-Hungary
Name:	SM U-1
Ordered:	24 November 1906
Builder:	Pola Navy Yard, Pola
Laid down:	2 July 1907
Launched:	10 February 1909
Commissioned:	15 April 1911
Refit:	late 1914–early 1915
Fate:	Ceded to Italy in 1920; scrapped
Service record
Commanders:	Egon Marchetti (April – September 1911) Otto Zeidler (September 1911 – July 1913) Narciss Blessich (July 1913 – May 1914) Franz Nejebsy (June 1914 – December 1915) Klemens Ritter von Bezard (December 1915 – May 1916) Franz Nejebsy (May 1916 – January 1917) Eugen Hornyák Edler von Horn (January – September 1917) Othmar Printz (March – October 1918)
Victories:	None
General characteristics
Type:	U-1-class submarine
Displacement:	229.7 tonnes (226.1 long tons) surfaced 223 tonnes (219 long tons) submerged
Length:	30 m (100 ft)
Beam:	4.80 m (15 ft 9 in)
Draft:	3.86 m (12 ft 8 in)
Propulsion:	2 × shafts 2 × gasoline engines, 720 bhp (540 kW) total 2 × electric motors, 200 shp (150 kW) total
Test depth:	40 meters (130 ft)
Complement:	17
Armament:	3 × 45 cm (17.7 in) torpedo tubes (two front, one rear) 5 torpedoes 1 × 37 mm (1.5 in) deck gun
Differences after modernization:
Displacement:	248.9 tonnes (245.0 long tons) surfaced 277.5 tonnes (273.1 long tons) submerged
Length:	30.76 m (100 ft 11 in)
Propulsion:	2 × shafts 2 × diesel engines 2 × electric motors, 200 shp (150 kW) total
Speed:	10.3 knots (19.1 km/h; 11.9 mph) surfaced 6 knots (11 km/h; 6.9 mph) submerged
Range:	950 nmi (1,760 km; 1,090 mi) at 6 knots (11 km/h; 6.9 mph), surfaced 40 nmi (74 km) at 2 knots (3.7 km/h; 2.3 mph), submerged

SM U-1 or U-I was the lead boat of her class of submarine or U-boat built for and operated by the Austro-Hungarian Navy (German: Kaiserliche und Königliche Kriegsmarine or K.u.K. Kriegsmarine). U-1 was designed by American Simon Lake's Lake Torpedo Boat Company and built at the navy yard in Pola. She was one of two Lake-designed submarines purchased as part of a competitive evaluation of foreign submarine designs.

U-1 was launched in February 1909 and was 100 feet (30 m) long and displaced between 230 and 249 tonnes (254 and 274 short tons) depending on whether surfaced or submerged. She was originally powered by gasoline engines for surface running, but during her trials, they were found to be incapable of reaching the contracted speed. U-1 was commissioned in April 1911 and served as a training boat through 1914.

At the beginning of World War I, U-1 was in drydock awaiting new batteries and replacement diesel engines. U-1 returned to service as a training boat until October 1915. From November she conducted reconnaissance cruises out of Trieste and Pola until she was declared obsolete in early 1918. She continued to serve in a training role at the submarine base on Brioni, but was at Pola at the end of the war. She was awarded to Italy as a war reparation in 1920 and scrapped at Pola. U-1 did not sink any ships during the war.

U-1 was built as part of a plan by the Austro-Hungarian Navy to competitively evaluate foreign submarine designs from Simon Lake, Germaniawerft, and John Philip Holland. The Austro-Hungarian Navy ordered plans for U-1 (and sister ship U-2) in 1906 from the Lake Torpedo Boat Company of Bridgeport, Connecticut.U-1 was built at the Pola Navy Yard and was launched on 10 February 1909.