German submarine U-1 (1935)

	Prewar picture of U-1
History
Nazi Germany
Name	U-1
Ordered	2 February 1935
Builder	Deutsche Werke, Kiel
Cost	1,500,000 Reichsmark
Yard number	236
Laid down	11 February 1935
Launched	15 June 1935
Commissioned	29 June 1935
Fate	Sunk 6 April 1940 north of Terschelling by a British mine
General characteristics
Class and type	Type IIA coastal submarine
Displacement	254 t (250 long tons) surfaced; 303 t (298 long tons) submerged; 381 t (375 long tons) total;
Length	40.90 m (134 ft 2 in) (o/a); 27.80 m (91 ft 2 in) (pressure hull);
Beam	4.08 m (13 ft 5 in) (o/a); 4.00 m (13 ft 1 in) (pressure hull);
Height	8.60 m (28 ft 3 in)
Draught	3.83 m (12 ft 7 in)
Installed power	700 PS (510 kW; 690 shp) (diesels); 360 PS (260 kW; 360 shp) (electric);
Propulsion	2 × propeller shafts; 2 × 0.85 m (2 ft 9 in) three-bladed propellers; 2 × diesel engines; 2 × double-acting electric motors;
Speed	13 knots (24 km/h; 15 mph) surfaced; 6.9 knots (12.8 km/h; 7.9 mph) submerged;
Range	1,050 nmi (1,940 km; 1,210 mi) at 12 knots (22 km/h; 14 mph) surfaced; 35 nmi (65 km; 40 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged;
Test depth	80 m (260 ft)
Complement	3 officers, 22 men
Armament	3 × 53.3 cm (21 in) torpedo tubes; 5 × torpedoes or up to 12 TMA or 18 TMB mines; 1 × 2 cm (0.79 in) C/30 anti-aircraft gun;
Service record
Part of:	U-boat School Flotilla; 1 July 1935 – 1 February 1940; 1 March – 6 April 1940;
Identification codes:	M 27 893
Commanders:	Oblt.z.S. / Kptlt. Klaus Ewerth; 29 June 1935 – 30 September 1936; Kptlt. Alexander Gelhaar; 1 October 1936 – 2 February 1938; Unknown; 3 February – 28 October 1938; Kptlt. / K.Kapt. Jürgen Deecke; 29 October 1938 – 6 April 1940;
Operations:	2 patrols:; 1st patrol:; 15 – 29 March 1940; 2nd patrol:; 4 – 6 April 1940;
Victories:	None

German submarine U-1 was the first U-boat (or submarine) built for Nazi Germany's Kriegsmarine following Adolf Hitler's abrogation of the terms of the Treaty of Versailles in 1935, which banned Germany possessing a submarine force.

A Type IIA U-boat, she was built at the Deutsche Werke shipyards in Kiel, yard number 236, her keel being laid on 11 February 1935 amid celebration. She was commissioned on 29 June 1935 after a very rapid construction, and was manned by crews trained in the Netherlands.

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