SM UB-64

	UB-148 at sea, a U-boat similar to UB-64.
History
German Empire
Name	UB-64
Ordered	20 May 1916
Builder	AG Vulcan, Hamburg
Cost	3,279,000 German Papiermark
Yard number	89
Launched	9 June 1917
Commissioned	5 August 1917
Fate	Surrendered to the British 21 November 1918 and broken up in Fareham in 1921
General characteristics
Class and type	Type UB III submarine
Displacement	508 t (500 long tons) surfaced; 639 t (629 long tons) submerged;
Length	55.52 m (182 ft 2 in) (o/a)
Beam	5.76 m (18 ft 11 in)
Draught	3.70 m (12 ft 2 in)
Propulsion	2 × propeller shaft ; 2 × MAN four-stroke 6-cylinder diesel engines, 1,085 bhp (809 kW); 2 × Siemens-Schuckert electric motors, 780 shp (580 kW);
Speed	13.3 knots (24.6 km/h; 15.3 mph) surfaced; 7.8 knots (14.4 km/h; 9.0 mph) submerged;
Range	8,420 nmi (15,590 km; 9,690 mi) at 6 knots (11 km/h; 6.9 mph) surfaced; 55 nmi (102 km; 63 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged;
Test depth	50 m (160 ft)
Complement	3 officers, 31 men
Armament	5 × 50 cm (19.7 in) torpedo tubes (4 bow, 1 stern); 10 torpedoes ; 1 × 8.8 cm (3.46 in) deck gun ;
Service record
Part of:	V Flotilla; 10 September 1917 – 20 April 1918; II Flotilla; 20 April – 11 November 1918;
Commanders:	Kptlt. Otto von Schrader ; 5 August – 31 October 1917; Kptlt. Walter Gude; 1 November 1917 – 25 January 1918; Kptlt. Woldemar Petri; 26 January – 27 February 1918; Kptlt. Otto von Schrader; 28 February – 31 August 1918; Oblt.z.S. Ernst Krieger; 1 September – 11 November 1918;
Operations:	8 patrols
Victories:	27 merchant ships sunk ; (21,528 GRT); 2 auxiliary warships sunk ; (12,221 GRT); 4 merchant ships damaged ; (48,497 GRT); 1 merchant ship taken as prize ; (371 GRT);

Last updated May 03, 2025

SM UB-64 was a German Type UB III submarine or U-boat in the German Imperial Navy (German : Kaiserliche Marine) during World War I. She was commissioned into the German Imperial Navy on 5 August 1917 as SM UB-64.^{[Note 1]}

Construction

She was built by AG Vulcan of Hamburg and following just under a year of construction, launched at Hamburg on 9 June 1917. UB-64 was commissioned later that same year under the command of Kptlt. Otto von Schrader.

Like all Type UB III submarines, UB-64 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-64 would carry a crew of up to 3 officer and 31 men and had a cruising range of 8,420 nautical miles (15,590 km; 9,690 mi). UB-64 had a displacement of 508 t (500 long tons) while surfaced and 639 t (629 long tons) when submerged. Her engines enabled her to travel at 13.3 knots (24.6 km/h; 15.3 mph) when surfaced and 8 knots (15 km/h; 9.2 mph) when submerged.

Summary of raiding history

Date	Name	Nationality	Tonnage^{[Note 2]}	Fate^[8]
13 October 1917	Newquay	United Kingdom	4,191	Damaged
13 December 1917	HMS Stephen Furness	Royal Navy	1,712	Sunk
14 February 1918	Saga	United Kingdom	1,143	Sunk
19 February 1918	Wilhelmina VII	Netherlands	109	Sunk
30 March 1918	Salaminia	Greece	3,112	Sunk
5 April 1918	Clam	United Kingdom	3,552	Damaged
11 April 1918	Lakemoor	United States	2,045	Sunk
23 May 1918	Innisfallen	United Kingdom	1,405	Sunk
30 May 1918	Cyprus	United Kingdom	35	Sunk
30 May 1918	Glad Tidings	United Kingdom	15	Sunk
30 May 1918	Honey Bee	United Kingdom	34	Sunk
30 May 1918	Jane Gordon	United Kingdom	27	Sunk
30 May 1918	Lloyd	United Kingdom	35	Sunk
30 May 1918	Marianne Mc Crum	United Kingdom	30	Sunk
30 May 1918	Never Can Tell	United Kingdom	31	Sunk
30 May 1918	Seabird	United Kingdom	15	Sunk
30 May 1918	Sparkling Wave	United Kingdom	37	Sunk
30 May 1918	St. Mary	United Kingdom	29	Sunk
8 June 1918	Elektra	Norway	614	Sunk
9 June 1918	Lena	Sweden	371	Captured as prize
19 July 1918	Justicia	United Kingdom	32,234	Damaged
19 July 1918	Ranger	United Kingdom	79	Sunk
23 July 1918	HMS Marmora	Royal Navy	10,509	Sunk
24 July 1918	Defender	United Kingdom	8,520	Damaged
13 September 1918	Buffalo	United Kingdom	286	Sunk
13 September 1918	M. J. Craig	United Kingdom	691	Sunk
13 September 1918	Setter	United Kingdom	956	Sunk
14 September 1918	Neotsfield	United Kingdom	3,821	Sunk
15 September 1918	Mary Fanny	United Kingdom	94	Sunk
15 September 1918	Energy	United Kingdom	89	Sunk
15 September 1918	Joseph Fisher	United Kingdom	88	Sunk
16 September 1918	Serula	United Kingdom	1,388	Sunk
19 September 1918	Barrister	United Kingdom	4,952	Sunk
21 September 1918	Downshire	United Kingdom	368	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.
↑ Merchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.

Citations

↑ Rössler 1979, p. 60.
1 2 3 4 5 6 Gröner 1991, pp. 25–30.
↑ Helgason, Guðmundur. "WWI U-boat commanders: Otto von Schrader (Royal House Order of Hohenzollern)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.
↑ Helgason, Guðmundur. "WWI U-boat commanders: Walter Gude". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.
↑ Helgason, Guðmundur. "WWI U-boat commanders: Woldemar Petri". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.
↑ Helgason, Guðmundur. "WWI U-boat commanders: Otto von Schrader (Royal House Order of Hohenzollern)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.
↑ Helgason, Guðmundur. "WWI U-boat commanders: Ernst Krieger". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.
↑ Helgason, Guðmundur. "Ships hit by UB 64". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 5 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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[8] "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-9] Merchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.

[FOOTNOTERössler197960-1] Rössler 1979, p. 60.

[FOOTNOTEGröner199125–30-2] 1 2 3 4 5 6 Gröner 1991, pp. 25–30.

[3] Helgason, Guðmundur. "WWI U-boat commanders: Otto von Schrader (Royal House Order of Hohenzollern)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.

[4] Helgason, Guðmundur. "WWI U-boat commanders: Walter Gude". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.

[5] Helgason, Guðmundur. "WWI U-boat commanders: Woldemar Petri". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.

[6] Helgason, Guðmundur. "WWI U-boat commanders: Otto von Schrader (Royal House Order of Hohenzollern)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.

[7] Helgason, Guðmundur. "WWI U-boat commanders: Ernst Krieger". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.

[10] Helgason, Guðmundur. "Ships hit by UB 64". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 5 December 2014.

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[Note 1]

[Note 2]

[8]

v t e Type UB III submarines
SM UB-48 SM UB-49 SM UB-50 SM UB-51 SM UB-52 SM UB-53 SM UB-54 SM UB-55 SM UB-56 SM UB-57 SM UB-58 SM UB-59 SM UB-60 SM UB-61 SM UB-62 SM UB-63 SM UB-64 SM UB-65 SM UB-66 SM UB-67 SM UB-68 SM UB-69 SM UB-70 SM UB-71 SM UB-72 SM UB-73 SM UB-74 SM UB-75 SM UB-76 SM UB-77 SM UB-78 SM UB-79 SM UB-80 SM UB-81 SM UB-82 SM UB-83 SM UB-84 SM UB-85 SM UB-86 SM UB-87 SM UB-88 SM UB-89 SM UB-90 SM UB-91 SM UB-92 SM UB-93 SM UB-94 SM UB-95 SM UB-96 SM UB-97 SM UB-98 SM UB-99 SM UB-100 SM UB-101 SM UB-102 SM UB-103 SM UB-104 SM UB-105 SM UB-106 SM UB-107 SM UB-108 SM UB-109 SM UB-110 SM UB-111 SM UB-112 SM UB-113 SM UB-114 SM UB-115 SM UB-116 SM UB-117 SM UB-118 SM UB-119 SM UB-120 SM UB-121 SM UB-122 SM UB-123 SM UB-124 SM UB-125 SM UB-126 SM UB-127 SM UB-128 SM UB-129 SM UB-130 SM UB-131 SM UB-132 SM UB-133 SM UB-136 SM UB-142 SM UB-143 SM UB-144 SM UB-145 SM UB-148 SM UB-149 SM UB-150 SM UB-154 SM UB-155
Preceded by: Type UB II Followed by: Type VII (World War II)
List of U-boats of Germany

History
UB-148 at sea, a U-boat similar to UB-64.
German Empire
Name	UB-64
Ordered	20 May 1916^[1]
Builder	AG Vulcan, Hamburg
Cost	3,279,000 German Papiermark
Yard number	89
Launched	9 June 1917^[2]
Commissioned	5 August 1917^[2]
Fate	Surrendered to the British 21 November 1918 and broken up in Fareham in 1921^[2]
General characteristics ^[2]
Class and type	Type UB III submarine
Displacement	508 t (500 long tons) surfaced 639 t (629 long tons) submerged
Length	55.52 m (182 ft 2 in) (o/a)
Beam	5.76 m (18 ft 11 in)
Draught	3.70 m (12 ft 2 in)
Propulsion	2 × propeller shaft 2 × MAN four-stroke 6-cylinder diesel engines, 1,085 bhp (809 kW) 2 × Siemens-Schuckert electric motors, 780 shp (580 kW)
Speed	13.3 knots (24.6 km/h; 15.3 mph) surfaced 7.8 knots (14.4 km/h; 9.0 mph) submerged
Range	8,420 nmi (15,590 km; 9,690 mi) at 6 knots (11 km/h; 6.9 mph) surfaced 55 nmi (102 km; 63 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth	50 m (160 ft)
Complement	3 officers, 31 men^[2]
Armament	5 × 50 cm (19.7 in) torpedo tubes (4 bow, 1 stern) 10 torpedoes 1 × 8.8 cm (3.46 in) deck gun
Service record
Part of:	V Flotilla 10 September 1917 – 20 April 1918 II Flotilla 20 April – 11 November 1918
Commanders:	Kptlt. Otto von Schrader ^[3] 5 August – 31 October 1917 Kptlt. Walter Gude^[4] 1 November 1917 – 25 January 1918 Kptlt. Woldemar Petri^[5] 26 January – 27 February 1918 Kptlt. Otto von Schrader^[6] 28 February – 31 August 1918 Oblt.z.S. Ernst Krieger^[7] 1 September – 11 November 1918
Operations:	8 patrols
Victories:	27 merchant ships sunk (21,528 GRT) 2 auxiliary warships sunk (12,221 GRT) 4 merchant ships damaged (48,497 GRT) 1 merchant ship taken as prize (371 GRT)