German submarine U-9 (1935)

U-9 in 1936, note the submarine's number on the hull which was painted out in wartime
History
Nazi Germany
Name:	U-9
Ordered:	20 July 1934
Builder:	Germaniawerft, Kiel Galați shipyard, Romania
Yard number:	543
Laid down:	8 April 1935
Launched:	30 July 1935
Commissioned:	21 August 1935
Fate:	Sunk 20 August 1944 at Constanța, Romania, in a Soviet air raid
General characteristics
Class and type:	IIB coastal submarine
Displacement:	279 t (275 long tons) surfaced 328 t (323 long tons) submerged
Length:	42.70 m (140 ft 1 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:	3.90 m (12 ft 10 in)
Installed power:	700 PS (510 kW; 690 bhp) (diesels) 410 PS (300 kW; 400 shp) (electric)
Propulsion:	2 shafts 2 × diesel engines 2 × electric motors
Range:	1,800 nmi (3,300 km; 2,100 mi) at 12 knots (22 km/h; 14 mph) surfaced 35–43 nmi (65–80 km; 40–49 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 1 × 2 cm (0.79 in) anti-aircraft gun
Service record
Part of:	Kriegsmarine: 1st U-boat Flotilla 21st U-boat Flotilla 24th U-boat Flotilla 30th U-boat Flotilla
Identification codes:	M 13 068
Commanders:	K.Kapt. Hans-Günther Looff Kptlt. Werner von Schmidt Kptlt. Ludwig Mathes Oblt.z.S. Max-Martin Schulte Oblt.z.S. Wolfgang Lüth Oblt.z.S. Wolfgang Kaufmann Oblt.z.S. Joachim Deecke Kptlt. Hans-Joachim Schmidt-Weichert Oblt.z.S. Heinrich Klapdor Oblt.z.S. Martin Landt-Hayen Kptlt. Klaus Petersen
Operations:	19
Victories:	Seven ships sunk for a total of 16,669 GRT One warship of 552 tons sunk One warship of 412 tons damaged

German submarine U-9 was a Type IIB U-boat of Nazi Germany's Kriegsmarine. Her keel was laid down on 8 February 1935, by Germaniawerft in Kiel as yard number 543. She was launched on 30 July 1935 and commissioned on 21 August, with Korvettenkapitän Hans-Günther Looff in command.

U-9 conducted 19 patrols under a series of commanders, including U-boat ace Wolfgang Lüth, sinking eight ships totalling 17,221 gross register tons (GRT) and damaging another displacing 412 tons. This included the French Sirène class coastal submarine Doris.

German Type IIB submarines were enlarged versions of the original Type IIs. U-9 had a displacement of 279 tonnes (275 long tons) when at the surface and 328 tonnes (323 long tons) while submerged. Officially, the standard tonnage was 250 long tons (250 t), however. The U-boat had a total length of 42.70 m (140 ft 1 in), a pressure hull length of 28.20 m (92 ft 6 in), a beam of 4.08 m (13 ft 5 in), a height of 8.60 m (28 ft 3 in), and a draught of 3.90 m (12 ft 10 in). The submarine was powered by two MWM RS 127 S four-stroke, six-cylinder diesel engines of 700 metric horsepower (510 kW; 690 shp) for cruising, two Siemens-Schuckert PG VV 322/36 double-acting electric motors producing a total of 460 metric horsepower (340 kW; 450 shp) for use while submerged. She had two shafts and two 0.85 m (3 ft) propellers. The boat was capable of operating at depths of up to 80–150 metres (260–490 ft).