SM UC-71










































































































History

German Empire
Name:
UC-71
Ordered:
12 January 1916[1]
Builder:
Blohm & Voss, Hamburg[2]
Yard number:
287[1]
Launched:
12 August 1916[1]
Commissioned:
28 November 1916[1]
Fate:
sunk on way to surrender, February 1919[1]
General characteristics [3]
Class and type:
German Type UC II submarine
Displacement:

  • 427 t (420 long tons), surfaced

  • 508 t (500 long tons), submerged


Length:

  • 50.35 m (165 ft 2 in) o/a

  • 40.30 m (132 ft 3 in) pressure hull


Beam:

  • 5.22 m (17 ft 2 in) o/a

  • 3.65 m (12 ft) pressure hull


Draught:
3.64 m (11 ft 11 in)
Propulsion:

  • 2 × propeller shafts

  • 2 × 6-cylinder, 4-stroke diesel engines, 600 PS (440 kW; 590 shp)

  • 2 × electric motors, 620 PS (460 kW; 610 shp)


Speed:

  • 12.0 knots (22.2 km/h; 13.8 mph), surfaced

  • 7.4 knots (13.7 km/h; 8.5 mph), submerged


Range:

  • 10,420 nmi (19,300 km; 11,990 mi) at 7 knots (13 km/h; 8.1 mph) surfaced

  • 52 nmi (96 km; 60 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged


Test depth:
50 m (160 ft)
Complement:
26
Armament:

  • 6 × 100 cm (39.4 in) mine tubes

  • 18 × UC 200 mines

  • 3 × 50 cm (19.7 in) torpedo tubes (2 bow/external; one stern)

  • 7 × torpedoes

  • 1 × 8.8 cm (3.5 in) Uk L/30 deck gun


Notes:
35-second diving time
Service record[1]
Part of:

  • Flandern II Flotilla

  • 3 March 1917 – 13 October 1918

  • I Flotilla

  • 13 October – 11 November 1918


Commanders:


  • Oblt.z.S. Hans Valentiner[4]

  • 28 November 1916 – 25 April 1917


  • Oblt.z.S. Hugo Thielmann[5]

  • 26 April – 9 June 1917


  • Oblt.z.S. Reinhold Saltzwedel[6]

  • 10 June – 13 September 1917


  • Oblt.z.S. Ernst Steindorff[7]

  • 14 September 1917 – 28 January 1918


  • Oblt.z.S. Walter Warzecha[8]

  • 29 January – 13 August 1918


  • Oblt.z.S. Eberhard Schmidt[9]

  • 14 August – 11 November 1918


Operations:
19 patrols
Victories:

  • 61 merchant ships sunk (107,540 GRT)

  • 17 merchant ships damaged (74,089 GRT)

  • 2 warships sunk (3,210 tons)

  • 1 warship damaged (1,250 tons)



SM UC-71 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. The U-boat was ordered on 12 January 1916 and was launched on 12 August 1916. She was commissioned into the German Imperial Navy on 28 November 1916 as SM UC-71.[Note 1] In 19 patrols UC-71 was credited with sinking 61 ships, either by torpedo or by mines laid. UC-71 sank on 20 February 1919 in the North Sea while on her way to be surrendered.[1]




Contents






  • 1 Design


  • 2 Summary of raiding history


  • 3 References


    • 3.1 Notes


    • 3.2 Citations


    • 3.3 Bibliography







Design


A German Type UC II submarine, UC-71 had a displacement of 427 tonnes (420 long tons) when at the surface and 508 tonnes (500 long tons) while submerged. She had a length overall of 50.35 m (165 ft 2 in), a beam of 5.22 m (17 ft 2 in), and a draught of 3.64 m (11 ft 11 in). The submarine was powered by two six-cylinder four-stroke diesel engines each producing 300 metric horsepower (220 kW; 300 shp) (a total of 600 metric horsepower (440 kW; 590 shp)), two electric motors producing 620 metric horsepower (460 kW; 610 shp), and two propeller shafts. She had a dive time of 48 seconds and was capable of operating at a depth of 50 metres (160 ft).[3]


The submarine had a maximum surface speed of 12 knots (22 km/h; 14 mph) and a submerged speed of 7.4 knots (13.7 km/h; 8.5 mph). When submerged, she could operate for 52 nautical miles (96 km; 60 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 10,420 nautical miles (19,300 km; 11,990 mi) at 7 knots (13 km/h; 8.1 mph). UC-71 was fitted with six 100 centimetres (39 in) mine tubes, eighteen UC 200 mines, three 50 centimetres (20 in) torpedo tubes (one on the stern and two on the bow), seven torpedoes, and one 8.8 cm (3.5 in) Uk L/30 deck gun. Her complement was twenty-six crew members.[3]



Summary of raiding history






















































































































































































































































































































































































































































































































































































































Date
Name
Nationality
Tonnage[Note 2]
Fate[10]
30 March 1917

Edernian

 United Kingdom
3,588
Damaged
30 March 1917

Saint Louis III

 France
97
Sunk
30 March 1917

Sarcelle

 France
49
Sunk
31 March 1917

Primrose

 United Kingdom
113
Sunk
3 April 1917

Ellen James

 United Kingdom
165
Sunk
4 April 1917

Pensiero

 Kingdom of Italy
2,632
Sunk
5 April 1917

Gower Coast

 United Kingdom
804
Sunk
5 April 1917

San Fulgencio

 Spain
1,558
Sunk
7 April 1917

Caminha

 Portugal
2,763
Sunk
9 April 1917

Themistoclis

 Greece
1,895
Sunk
9 April 1917

Valhall

 Norway
750
Sunk
10 April 1917

Ranvik

 Norway
5,848
Sunk
12 April 1917

Edelweiss

 France
192
Sunk
18 April 1917

Heim

 Norway
1,669
Sunk
23 April 1917

Cenobic

 Belgium
16
Sunk
2 May 1917

Westland

 Netherlands
108
Sunk
5 May 1917

Simon

 Netherlands
150
Sunk
15 May 1917

Boreas

 Netherlands
192
Sunk
16 May 1917

Hendrika Johana

 Netherlands
134
Sunk
17 May 1917

Jakoba

 Netherlands
107
Sunk
17 May 1917

Mercurius

 Netherlands
80
Sunk
18 May 1917

Annetta

 Netherlands
177
Sunk
14 June 1917

Wega

 United Kingdom
839
Sunk
15 June 1917

Wapello

 United Kingdom
5,576
Sunk
26 June 1917

Normandy

 France
543
Damaged
28 June 1917

Marne

 France
4,019
Sunk
29 June 1917

Driskos

 Greece
2,833
Sunk
3 July 1917

Orleans

 United States
2,853
Sunk
4 July 1917

Snetoppen

 Norway
2,349
Sunk
6 July 1917

Løvstakken

 Norway
3,105
Sunk
6 July 1917

Victoria 2

 Norway
2,798
Sunk
8 July 1917

Vendee

 United Kingdom
1,295
Sunk
3 August 1917

Aube

 United Kingdom
1,837
Sunk
4 August 1917

Afrique

 France
2,457
Damaged
4 August 1917

Cairnstrath

 United Kingdom
2,128
Sunk
7 August 1917

Port Curtis

 United Kingdom
4,710
Sunk
8 August 1917

HMS Dunraven

 Royal Navy
3,117
Sunk
6 September 1917

Elisabethville

 Belgium
7,017
Sunk
7 September 1917

Mont de Piete

 France
38
Sunk
7 September 1917

Kleber

 France
277
Damaged
8 September 1917

Setubal

 Norway
1,201
Sunk
9 September 1917

HMS Myosotis

 Royal Navy
1,250
Damaged
10 September 1917

Vikholmen

 Norway
494
Sunk
22 September 1917

Matti

 Norway
2,139
Damaged
22 September 1917

Trongate

 United Kingdom
2,553
Sunk
23 September 1917

Hornsund

 United Kingdom
3,646
Sunk
24 September 1917

Leka

 Norway
1,845
Sunk
31 October 1917

Estrellano

 United Kingdom
1,161
Sunk
5 November 1917

Alcedo

 United States
983
Sunk
16 November 1917

Naalso

 France
135
Sunk
6 December 1917

Apley

 United Kingdom
222
Sunk
6 December 1917

Wyndhurst

 United Kingdom
570
Sunk
6 December 1917

Braeside

 United Kingdom
569
Sunk
24 December 1917

Luciston

 United Kingdom
2,877
Sunk
25 December 1917

Espagne

 Belgium
1,463
Sunk
25 December 1917

Hyacinthus

 United Kingdom
5,756
Damaged
27 December 1917

P. L. M. 4

 France
2,640
Sunk
28 December 1917

Fallodon

 United Kingdom
3,012
Sunk
28 December 1917

HMD Piscatorial II

 Royal Navy
93
Sunk
29 December 1917

Sapper

 United Kingdom
276
Sunk
18 January 1918

Gambri

 United Kingdom
274
Sunk
20 January 1918

Harmonides

 United Kingdom
3,521
Damaged
23 January 1918

Aalesund

 Norway
414
Sunk
14 February 1918

Atlas

 United Kingdom
3,090
Sunk
19 February 1918

Athenic

 United Kingdom
4,078
Damaged
19 February 1918

Commonwealth

 United Kingdom
3,353
Sunk
8 March 1918

Saba

 United Kingdom
4,257
Damaged
12 March 1918

Clarissa Radcliffe

 United Kingdom
5,754
Damaged
12 March 1918

Savan

 United Kingdom
4,264
Damaged
13 March 1918

Londonier

 Belgium
1,870
Sunk
14 March 1918

Agate

 United Kingdom
248
Sunk
14 March 1918

Comrie Castle

 United Kingdom
5,173
Damaged
7 April 1918

Highland Brigade

 United Kingdom
5,669
Sunk
12 April 1918

Luis

 United Kingdom
4,284
Sunk
10 May 1918

Amplegarth

 United Kingdom
3,707
Sunk
15 May 1918

Pennyworth

 United Kingdom
5,388
Damaged
20 May 1918

Manchester Importer

 United Kingdom
4,028
Damaged
26 June 1918

Raranga

 United Kingdom
10,040
Damaged
31 July 1918

City of Liverpool

 United Kingdom
88
Sunk
4 August 1918

Waipara

 United Kingdom
6,994
Damaged
5 August 1918

Polescar

 United Kingdom
5,832
Damaged
15 August 1918

Ulleswater

 United Kingdom
930
Sunk
15 August 1918

HMS Scott

 Royal Navy
1,801
Sunk
20 August 1918
Mineswepper Shirley

 Royal Navy
820
Damaged


References



Notes





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


  2. ^ Merchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.




Citations





  1. ^ abcdefg Helgason, Guðmundur. "WWI U-boats: UC 71". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 23 February 2009..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"""""""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}


  2. ^ Tarrant, p. 173.


  3. ^ abc Gröner 1991, pp. 31-32.


  4. ^ Helgason, Guðmundur. "WWI U-boat commanders: Hans Valentiner (Royal House Order of Hohenzollern)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 March 2015.


  5. ^ Helgason, Guðmundur. "WWI U-boat commanders: Hugo Thielmann". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 March 2015.


  6. ^ Helgason, Guðmundur. "WWI U-boat commanders: Reinhold Saltzwedel (Pour le Mérite)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 March 2015.


  7. ^ Helgason, Guðmundur. "WWI U-boat commanders: Ernst Steindorff (Royal House Order of Hohenzollern)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 March 2015.


  8. ^ Helgason, Guðmundur. "WWI U-boat commanders: Walter Warzecha (Royal House Order of Hohenzollern)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 March 2015.


  9. ^ Helgason, Guðmundur. "WWI U-boat commanders: Eberhard Schmidt". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 March 2015.


  10. ^ Helgason, Guðmundur. "Ships hit by UC 71". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 10 December 2014.




Bibliography


.mw-parser-output .refbegin{font-size:90%;margin-bottom:0.5em}.mw-parser-output .refbegin-hanging-indents>ul{list-style-type:none;margin-left:0}.mw-parser-output .refbegin-hanging-indents>ul>li,.mw-parser-output .refbegin-hanging-indents>dl>dd{margin-left:0;padding-left:3.2em;text-indent:-3.2em;list-style:none}.mw-parser-output .refbegin-100{font-size:100%}



  • Bendert, Harald (2001). Die UC-Boote der Kaiserlichen Marine 1914-1918. Minenkrieg mit U-Booten (in German). Hamburg, Berlin, Bonn: Mittler. ISBN 3-8132-0758-7.


  • Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.


  • Gardiner, Robert, ed. (1985). Conway's All the World's Fighting Ships, 1906–1921. Annapolis, Maryland: Naval Institute Press. ISBN 978-0-87021-907-8. OCLC 12119866.CS1 maint: Extra text: authors list (link)


  • Tarrant, V. E. (1989). The U-Boat Offensive: 1914–1945. Annapolis, Maryland: Naval Institute Press. ISBN 978-0-87021-764-7. OCLC 20338385.





Coordinates: 54°10′N 7°54′E / 54.167°N 7.900°E / 54.167; 7.900







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