SM UB-34

	SM UB-45, a U-boat similar to UB-34
History
German Empire
Name	UB-34
Ordered	22 July 1915
Builder	Blohm & Voss, Hamburg
Cost	1,152,000 German Papiermark
Yard number	258
Launched	28 December 1915
Completed	17 May 1916
Commissioned	10 June 1916
Fate	Surrendered 26 November 1918
General characteristics
Class & type	Type UB II submarine
Displacement	274 t (270 long tons) surfaced; 303 t (298 long tons) submerged;
Length	36.90 m (121 ft 1 in) o/a ; 27.90 m (91 ft 6 in) pressure hull ;
Beam	4.37 m (14 ft 4 in) o/a; 3.85 m (12 ft 8 in) pressure hull;
Draught	3.69 m (12 ft 1 in)
Propulsion	1 × propeller shaft ; 2 × 6-cylinder diesel engine, 270 PS (200 kW; 270 bhp); 2 × electric motor, 280 PS (210 kW; 280 shp);
Speed	9.06 knots (16.78 km/h; 10.43 mph) surfaced; 5.71 knots (10.57 km/h; 6.57 mph) submerged;
Range	7,030 nmi (13,020 km; 8,090 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;
Test depth	50 m (160 ft)
Complement	2 officers, 21 men
Armament	2 × 50 cm (19.7 in) torpedo tubes ; 4 × torpedoes (later 6); 1 × 8.8 cm (3.5 in) Uk L/30 deck gun ;
Notes	42-second diving time
Service record
Part of	I Flotilla; 27 July 1916 – 1 February 1917; II Flotilla; 1 February – 10 September 1917; V Flotilla; 10 September 1917 – 3 May 1918; I Flotilla; 3 May – 9 September 1918; Flandern Flotilla; 9 September – 6 October 1918; Training Flotilla; 6 October – 11 November 1918;
Commanders	Oblt.z.S. Theodor Schultz; 10 June 1916 – 16 March 1917; Oblt.z.S. Ludwig Schaafhausen; 17 March – 31 August 1917; Oblt.z.S. Helmuth von Ruckteschell ; 1 September 1917 – 30 March 1918; Oblt.z.S. Erich Förste ; 31 March – 8 September 1918; Lt.z.S. Hans Illing; 9 September - 6 October 1918;
Operations	21 patrol
Victories	29 merchant ships sunk ; (39,122 GRT); 2 auxiliary warships sunk ; (374 GRT); 2 merchant ships damaged ; (12,406 GRT); 2 merchant ships taken as prize ; (2,210 GRT);

Last updated December 13, 2025

SM UB-34^{[Note 1]} was a German Type UB II submarine or U-boat in the German Imperial Navy (German : Kaiserliche Marine) during World War I. The U-boat was ordered on 22 July 1915 and launched on 5 December 1915. She was commissioned into the German Imperial Navy on 10 June 1916 as SM UB-34.

Design

A Type UB II submarine, UB-34 had a displacement of 274 tonnes (270 long tons) when at the surface and 303 tonnes (298 long tons) while submerged. She had a total length of 36.90 m (121 ft 1 in), a beam of 4.37 m (14 ft 4 in), and a draught of 3.69 m (12 ft 1 in). The submarine was powered by two Benz six-cylinder diesel engines producing a total 270 metric horsepower (270 shp; 200 kW), two Siemens-Schuckert electric motors producing 280 metric horsepower (210 kW; 280 shp), and one propeller shaft. She was capable of operating at depths of up to 50 metres (160 ft).^[2]

The submarine had a maximum surface speed of 9.06 knots (16.78 km/h; 10.43 mph) and a maximum submerged speed of 5.71 knots (10.57 km/h; 6.57 mph). When submerged, she could operate for 45 nautical miles (83 km; 52 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 7,030 nautical miles (13,020 km; 8,090 mi) at 5 knots (9.3 km/h; 5.8 mph). UB-34 was fitted with two 50 centimetres (20 in) torpedo tubes, four torpedoes, and one 8.8 cm (3.5 in) Uk L/30 deck gun. She had a complement of twenty-one crew members and two officers and a 42-second dive time.^[2]

Summary of raiding history

Date	Name	Nationality	Tonnage^{[Note 2]}	Fate^[6]
21 October 1916	Ull	Norway	1,139	Sunk
22 October 1916	Effort	United Kingdom	159	Sunk
23 October 1916	Regina	Norway	823	Sunk
26 October 1916	Titan	United Kingdom	171	Sunk
18 December 1916	Arran	United Kingdom	176	Sunk
19 December 1916	Ansgar	Norway	926	Sunk
19 December 1916	Kornmo	Norway	591	Sunk
19 December 1916	Bretland	Denmark	2,025	Captured as prize
20 December 1916	Eva	Denmark	109	Sunk
20 December 1916	Mereddio	Sweden	1,372	Sunk
5 February 1917	Hurstwood	United Kingdom	1,229	Sunk
6 February 1917	Ferruccio	Kingdom of Italy	2,192	Sunk
7 February 1917	Corsican Prince	United Kingdom	2,776	Sunk
7 February 1917	Saint Ninian	United Kingdom	3,026	Sunk
25 April 1917	Este	Denmark	1,420	Sunk
7 September 1917	Grelfryda	United Kingdom	5,136	Damaged
8 September 1917	Aladdin	Norway	753	Sunk
27 September 1917	Greltoria	United Kingdom	5,143	Sunk
29 September 1917	Bertha	Netherlands	185	Captured as prize
27 October 1917	Lady Helen	United Kingdom	811	Sunk
13 December 1917	Bangarth	United Kingdom	1,872	Sunk
15 December 1917	Dafni	Greece	1,190	Sunk
24 January 1918	HMT Desire	Royal Navy	135	Sunk
24 January 1918	X6	United Kingdom	160	Sunk
24 January 1918	X110	United Kingdom	160	Sunk
25 January 1918	Folmina	Netherlands	1,158	Sunk
25 January 1918	Humber	United Kingdom	280	Sunk
26 January 1918	Hartley	United Kingdom	1,150	Sunk
26 January 1918	Athos	Norway	1,708	Sunk
9 March 1918	Randelsborg	Denmark	1,551	Sunk
13 March 1918	Adine	Norway	2,235	Sunk
16 March 1918	Quintero	Denmark	1,611	Sunk
21 April 1918	Lompoc	United Kingdom	7,270	Damaged
10 June 1918	Lowtyne	United Kingdom	3,231	Sunk
22 September 1918	HMT Elise	Royal Navy	239	Sunk

References

Notes

↑ "SM" stands for "Seiner Majestät" (English: His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.
↑ Tonnages are in gross register tons

Citations

1 2 3 4 5 Rössler 1979, p. 64.
1 2 3 4 5 6 Gröner 1991, pp. 23–25.
↑ Helgason, Guðmundur. "WWI U-boats: UB 34". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 10 December 2014.
↑ Bendert 2000, p. 96.
↑ Gröner 1991, pp. 50–51.
↑ Helgason, Guðmundur. "Ships hit by UB 34". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 10 December 2014.

Bibliography

Bendert, Harald (2000). Die UB-Boote der Kaiserlichen Marine, 1914-1918. Einsätze, Erfolge, Schicksal (in German). Hamburg: Verlag E.S. Mittler & Sohn GmbH. ISBN 3-8132-0713-7.
Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. Vol. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.
Rössler, Eberhard (1979). Die deutschen U-Boote und ihre Werften: eine Bilddokumentation über den deutschen U-Bootbau; in zwei Bänden (in German). Vol. I. Munich: Bernard & Graefe. ISBN 3-7637-5213-7.

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[4] "SM" stands for "Seiner Majestät" (English: His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.

[tonnage-7] Tonnages are in gross register tons

[FOOTNOTERössler197964-1] 1 2 3 4 5 Rössler 1979, p. 64.

[FOOTNOTEGröner199123–25-2] 1 2 3 4 5 6 Gröner 1991, pp. 23–25.

[UB34-3] Helgason, Guðmundur. "WWI U-boats: UB 34". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 10 December 2014.

[FOOTNOTEBendert200096-5] Bendert 2000, p. 96.

[FOOTNOTEGröner199150–51-6] Gröner 1991, pp. 50–51.

[8] Helgason, Guðmundur. "Ships hit by UB 34". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 10 December 2014.

[1]

[2]

[3]

[Note 1]

[4]

[5]

[Note 2]

[6]

v t e German Type UB II submarines
UB-18 UB-19 UB-20 UB-21 UB-22 UB-23 UB-24 UB-25 UB-26 UB-27 UB-28 UB-29 UB-30 UB-31 UB-32 UB-33 UB-34 UB-35 UB-36 UB-37 UB-38 UB-39 UB-40 UB-41 UB-42 UB-43 UB-44 UB-45 UB-46 UB-47
Preceded by: Type UB I Followed by: Type UB III
List of U-boats of Germany

History

SM UB-45, a U-boat similar to UB-34




German Empire
Name	UB-34
Ordered	22 July 1915^[1]
Builder	Blohm & Voss, Hamburg ^[1]
Cost	1,152,000 German Papiermark ^[2]
Yard number	258^[1]
Launched	28 December 1915^[1]
Completed	17 May 1916^[1]
Commissioned	10 June 1916^[2]
Fate	Surrendered 26 November 1918^[2]


General characteristics ^[2]
Class & type	Type UB II submarine
Displacement	274 t (270 long tons) surfaced 303 t (298 long tons) submerged
Length	36.90 m (121 ft 1 in) o/a 27.90 m (91 ft 6 in) pressure hull
Beam	4.37 m (14 ft 4 in) o/a 3.85 m (12 ft 8 in) pressure hull
Draught	3.69 m (12 ft 1 in)
Propulsion	1 × propeller shaft 2 × 6-cylinder diesel engine, 270 PS (200 kW; 270 bhp) 2 × electric motor, 280 PS (210 kW; 280 shp)
Speed	9.06 knots (16.78 km/h; 10.43 mph) surfaced 5.71 knots (10.57 km/h; 6.57 mph) submerged
Range	7,030 nmi (13,020 km; 8,090 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
Test depth	50 m (160 ft)
Complement	2 officers, 21 men
Armament	2 × 50 cm (19.7 in) torpedo tubes 4 × torpedoes (later 6) 1 × 8.8 cm (3.5 in) Uk L/30 deck gun
Notes	42-second diving time


Service record^[3]
Part of	I Flotilla 27 July 1916 – 1 February 1917 II Flotilla 1 February – 10 September 1917 V Flotilla 10 September 1917 – 3 May 1918 I Flotilla 3 May – 9 September 1918 Flandern Flotilla 9 September – 6 October 1918 Training Flotilla 6 October – 11 November 1918
Commanders	Oblt.z.S. Theodor Schultz 10 June 1916 – 16 March 1917 Oblt.z.S. Ludwig Schaafhausen 17 March – 31 August 1917 Oblt.z.S. Helmuth von Ruckteschell 1 September 1917 – 30 March 1918 Oblt.z.S. Erich Förste 31 March – 8 September 1918 Lt.z.S. Hans Illing 9 September - 6 October 1918
Operations	21 patrol
Victories	29 merchant ships sunk (39,122 GRT) 2 auxiliary warships sunk (374 GRT) 2 merchant ships damaged (12,406 GRT) 2 merchant ships taken as prize (2,210 GRT)