SM U-100

History
German Empire
Name	U-100
Ordered	15 September 1915
Builder	AG Weser, Bremen
Yard number	251
Laid down	30 November 1915
Launched	25 February 1917
Commissioned	16 April 1917
Fate	Surrendered 27 November 1918; scrapped Swansea 1919
General characteristics [1]
Class and type	German Type U 57 submarine
Displacement	750 t (740 long tons) surfaced; 952 t (937 long tons) submerged;
Length	67.60 m (221 ft 9 in) (o/a); 54.02 m (177 ft 3 in) (pressure hull);
Beam	6.32 m (20 ft 9 in) (o/a); 4.05 m (13 ft 3 in) (pressure hull);
Height	8.25 m (27 ft 1 in)
Draught	3.65 m (12 ft)
Installed power	2 × 2,400 PS (1,765 kW; 2,367 shp) surfaced; 2 × 1,200 PS (883 kW; 1,184 shp) submerged;
Propulsion	2 shafts, 2 × 1.65 m (5 ft 5 in) propellers
Speed	16.5 knots (30.6 km/h; 19.0 mph) surfaced; 8.8 knots (16.3 km/h; 10.1 mph) submerged;
Range	10,100 nmi (18,700 km; 11,600 mi) at 8 knots (15 km/h; 9.2 mph) surfaced; 56 nmi (104 km; 64 mi) at 5 knots (9.3 km/h; 5.8 mph) submerged;
Test depth	50 m (164 ft 1 in)
Complement	4 officers, 32 enlisted
Armament	4 × 50 cm (19.7 in) torpedo tubes (two bow, two stern); 10–12 torpedoes; 1 × 10.5 cm (4.1 in) SK L/45 deck gun;
Service record
Part of:	II Flotilla; 31 May 1917 – 11 November 1918;
Commanders:	Kptlt. Freiherr Degenhart von Loë[2]; 31 May 1917 – 30 September 1918; Kptlt. Friedrich Götting[3]; 1 October – 11 November 1918;
Operations:	8 patrols
Victories:	10 merchant ships sunk ; (34,505 GRT); 2 merchant ships damaged ; (5,272 GRT);

SM U-100[Note 1] was one of the 329 submarines serving in the Imperial German Navy in World War I. U-100 was engaged in the German campaign against Allied commerce (Handelskrieg) during that conflict.[4]

U-100 was surrendered to the Allies at Harwich on 21 November 1918 in accordance with the requirements of the Armistice with Germany. After being exhibited at Blyth in December 1918, she was sold while lying there by the British Admiralty to George Cohen on 3 March 1919 for £2,250 (excluding her engines), and was broken up at Swansea. Her engines were sold to Southend Corporation for use in an electricity generating station.[5]

Summary of raiding history

Date	Name	Nationality	Tonnage[Note 2]	Fate[6]
14 June 1917	Cedarbank	Norway	2,825	Sunk
17 June 1917	Gunhild	Denmark	996	Sunk
22 June 1917	Melford Hall	United Kingdom	6,339	Sunk
5 August 1917	Kathleen	United Kingdom	3,915	Sunk
9 August 1917	Blagdon	United Kingdom	1,996	Sunk
27 December 1917	Adela	United Kingdom	685	Sunk
15 February 1918	Thalatta I	Netherlands	358	Damaged
21 February 1918	Rio Verde	United Kingdom	4,025	Sunk
16 April 1918	Lake Michigan	United Kingdom	9,288	Sunk
9 June 1918	Helene	Netherlands	112	Sunk
21 June 1918	Homer City	United Kingdom	4,914	Damaged
21 June 1918	Montebello	United Kingdom	4,324	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

Gröner 1991, pp. 12–14.
Helgason, Guðmundur. "WWI U-boat commanders: Freiherr Degenhart von Loë". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 25 January 2015.
Helgason, Guðmundur. "WWI U-boat commanders: Friedrich Götting". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 25 January 2015.
Helgason, Guðmundur. "WWI U-boats: U 100". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 25 January 2010.
Dodson, Aidan; Cant, Serena (2020). Spoils of War: the fate of enemy fleets after the two World Wars. Barnsley: Seaforth. pp. 92–93, 125. ISBN 978-1-5267-4198-1.
Helgason, Guðmundur. "Ships hit by U 100". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 25 January 2015.

Bibliography

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.

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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

[FOOTNOTEGröner199112–14-1] Gröner 1991, pp. 12–14.

[2] Helgason, Guðmundur. "WWI U-boat commanders: Freiherr Degenhart von Loë". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 25 January 2015.

[3] Helgason, Guðmundur. "WWI U-boat commanders: Friedrich Götting". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 25 January 2015.

[5] Helgason, Guðmundur. "WWI U-boats: U 100". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 25 January 2010.

[6] Dodson, Aidan; Cant, Serena (2020). Spoils of War: the fate of enemy fleets after the two World Wars. Barnsley: Seaforth. pp. 92–93, 125. ISBN 978-1-5267-4198-1.

[8] Helgason, Guðmundur. "Ships hit by U 100". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 25 January 2015.