German submarine U-1 (1935)

Prewar picture of U-1
History
Nazi Germany
Name	U-1
Ordered	2 February 1935[1]
Builder	Deutsche Werke, Kiel[2]
Cost	1,500,000 Reichsmark
Yard number	236[2]
Laid down	11 February 1935[2]
Launched	15 June 1935[2]
Commissioned	29 June 1935[2]
Fate	Sunk 6 April 1940 north of Terschelling by a British mine[3]
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[4]
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.