SM UB-13

After the German Army's rapid advance along the North Sea coast in the earliest stages of World War I, the German Imperial Navy found itself without suitable submarines that could be operated in the narrow and shallow seas off Flanders.Miller, pp. 46–47.Karau, p. 48. Project 34, a design effort begun in mid-August 1914, produced the Type UB I design: a small submarine that could be shipped by rail to a port of operations and quickly assembled. Constrained by railroad size limitations, the UB I design called for a boat about {{convert|28|m|ft}} long and displacing about {{convert|125|t|LT}} with two torpedo tubes.A further refinement of the design—replacing the torpedo tubes with mine chutes but changing little else—evolved into the Type UC I coastal minelaying submarine. See: Miller, p. 458.

UB-13 was part of the initial allotment of seven submarines—numbered {{SMU|UB-9||2}} to {{SMU|UB-15||2}}—ordered on 15 October from AG Weser of Bremen, just shy of two months after planning for the class began.Williamson, p. 12. UB-13 was laid down by Weser in Bremen on 7 November. As built, UB-13 was {{convert|27.88|m|ftin}} long, {{convert|3.15|m|ftin}} abeam, and had a draft of {{convert|3.03|m|ftin}}. She had a single {{convert|44|kW|bhp|order=flip|adj=on}} Körting 4-cylinder diesel engine for surface travel, and a single {{convert|89|kW|shp|order=flip|adj=on}} Siemens-Schuckert electric motor for underwater travel, both attached to a single propeller shaft. Her top speeds were {{convert|7.45|kn}}, surfaced, and {{convert|6.24|kn}}, submerged. At more moderate speeds, she could sail up to {{convert|1,500|nmi|lk=in}} on the surface before refueling, and up to {{convert|45|nmi}} submerged before recharging her batteries. Like all boats of the class, UB-13 was rated to a diving depth of {{convert|50|m|ft}}, and could completely submerge in 33 seconds.

UB-13 was armed with two {{convert|45|cm|in|1|sp=us|adj=on}} torpedoes in two bow torpedo tubes. She was also outfitted for a single {{convert|8|mm|in|sp=us|adj=on}} machine gun on deck. UB-13{{'}}s standard complement consisted of one officer and thirteen enlisted men.Karau, p. 49.

After work on UB-13 was complete at the Weser yard, she was readied for rail shipment. The process of shipping a UB I boat involved breaking the submarine down into what was essentially a knock down kit. Each boat was broken into approximately fifteen pieces and loaded onto eight railway flatcars. In February 1915, the sections of UB-13 were shipped to Antwerp for assembly in what was typically a two- to three-week process. After UB-13 was assembled and launched on 8 March, she was loaded on a barge and taken through canals to Bruges where she underwent trials.

The submarine was commissioned into the German Imperial Navy as SM UB-13 on 6 April 1915 under the command of Oberleutnant zur See Walter Gustav Becker, a 29-year-old first-time U-boat commander.{{cite Uboat.net

|name=Walter Gustav Becker

|id=19

|type=1comm

|access-date=17 March 2009

}}Becker was in the Navy's April 1905 cadet class with 36 other future U-boat captains, including Hermann von Fischel, Carl-Siegfried Ritter von Georg, Kurt Hartwig, and Hans von Mellenthin. See: {{cite Uboat.net

|name=Crew 4/05

|id=4%2F05

|type=1crew

|access-date=17 March 2009

}} On 26 April, UB-13 joined the Flanders Flotilla ({{langx|de|U-boote des Marinekorps U-Flotille Flandern}}), which had been organized on 29 March. When UB-13 joined the flotilla, Germany was in the midst of its first submarine offensive, begun in February. During this campaign, enemy vessels in the German-defined war zone ({{langx|de|Kriegsgebiet}}), which encompassed all waters around the United Kingdom, were to be sunk. Vessels of neutral countries were not to be attacked unless they definitively could be identified as enemy vessels operating under a false flag.Tarrant, p. 14.

File:Smack-brightlingsea.jpg, traditionally outfitted with red ochre sails, like this contemporary smack.]]

Submarines of the Flanders Flotilla sank over 14,000 tons of merchant vessels in June 1915,Tarrant, p. 148. and UB-13{{'}}s first ship sunk, Dulcie, contributed almost one-seventh of that total. The British steamer Dulcie, listed at {{GRT|2033|disp=long}}, was headed from Dunston for Le Havre with a load of coal when Becker torpedoed her {{convert|6|nmi}} east of Aldeburgh. One man on Dulcie lost his life in the attack.{{cite Uboat.net

|name=Dulcie

|id=1742

|type=1ship

|access-date=17 March 2009

}} Dulcie was the only ship sunk by UB-13 in June.

On 27 and 28 July, Becker and UB-13 sank three British fishing vessels while patrolling between {{convert|15|and|30|nmi}} off Lowestoft.{{cite Uboat.net

|id=2954

|name=Iceni

|type=1ship

}}, {{cite Uboat.net

|id=5349

|name=Salacia

|type=1ship

}}, {{cite Uboat.net

|id=6601

|name=Young Percy

|type=1ship

}} All three of the sunken ships were smacks—sailing vessels traditionally rigged with red ochre sails{{cite web | author=Penwith District Council | author-link=Penwith District Council | title=Boat Types | url=http://www.penwith.gov.uk/index.cfm?articleid=23907 | publisher=Penwith District Council | location=Penzance | year=2009 | access-date=17 March 2009 | url-status=dead | archive-url=https://archive.today/20070527105624/http://www.penwith.gov.uk/index.cfm?articleid=23907 | archive-date=27 May 2007 }}—which were stopped, boarded by crewmen from UB-16, and sunk with explosives.{{cite web |title=British fishing vessels lost at sea due to enemy action: 1914, 1915, 1916 in date order |url=http://www.naval-history.net/WW1LossesBrFV1914-16.htm | work=World War 1 at Sea | date=9 January 2009|access-date=17 March 2009 }} The information on the website is extracted from {{cite book |title=British Vessels Lost at Sea: 1914–1918 | publisher=His Majesty's Stationery Office | year=1919 }}

In response to American demands after German submarines had sunk the Cunard Line steamer {{RMS|Lusitania||2}} in May 1915 and other high-profile sinkings in August and September, the chief of the Admiralstab, Admiral Henning von Holtzendorff, issued orders suspending the first offensive on 18 September. His directive ordered all U-boats out of the English Channel and the South-Western Approaches and required that all submarine activity in the North Sea be conducted strictly along prize regulations.Tarrant, pp. 21–22. On 20 February 1916, under the command of Kapitänleutnant Karl Neumann, who replaced Becker in December 1915,{{cite Uboat.net

|name=Karl Neumann

|id=219

|type=1comm

|access-date=17 March 2009

}} UB-13 captured a Belgian ship named Z10 David Marie and retained her as a prize. There are no further details about where Z10 David Marie was taken or her final disposition, but other ships captured as prizes by Flanders boats were sailed into Zeebrugge by prize crews.{{cite Uboat.net

|name=Batavier Ii (p.)

|id=665

|type=1ship

|access-date=17 March 2009

}}

By early 1916, the British blockade of Germany was beginning to have an effect on Germany and her imports. The Royal Navy had stopped and seized more cargo destined for Germany than the quantity of cargo sunk by German U-boats in the first submarine offensive.Tarrant, p. 25. As a result, the German Imperial Navy began a second offensive against merchant shipping on 29 February.Tarrant, p. 26. The final ground rules agreed upon by the German Admiralstab were that all enemy vessels in Germany's self-proclaimed war zone would be destroyed without warning, that enemy vessels outside the war zone would be destroyed only if armed, and—to avoid antagonizing the United States—that enemy passenger steamers were not to be attacked, regardless of whether in the war zone or not. The day after the beginning of the second offensive, Neumann and UB-13 sank four more fishing smacks northeast of Lowestoft.{{cite Uboat.net

|id=7061

|name=Harold

|type=1ship

}}, {{cite Uboat.net

|id=6953

|name=Reliance

|type=1ship

}}, {{cite Uboat.net

|id=6878

|name=Trevose

|type=1ship

}}, {{cite Uboat.net

|id=6145

|name=Try On

|type=1ship

}} Retrieved on 17 March 2009. All four ships were boarded and sunk in the same manner as the three sunk the previous July. Shortly after, Neumann was transferred to command {{SMU|UB-2||2}} in early March,Uboat.net reports Neumann in command of UB-13 until 11 March 1916, but also lists him in command of {{SMU|UB-2}} from 8 March, a four-day overlap. and was replaced by Oberleutnant zur See Arthur Metz, who had been in command of {{SMU|UB-17||2}} for the preceding month.{{cite Uboat.net

|name=Arthur Metz

|id=201

|type=1comm

|access-date=17 March 2009

}}

File:Tubantia cartoon.jpg decrying the sinking of Tubantia]]

Shortly after 02:30 on 16 March, a torpedo from UB-13 struck the starboard side of the neutral Dutch ocean liner {{SS|Tubantia||2}}, which was at anchor near the North Hinder Lightship, about {{convert|50|nmi}} off the Dutch coast.Van Tuyll van Serooskerken, p. 159. The Royal Holland Lloyd ({{langx|nl|Koninklijke Hollandsche Lloyd}}) ship had been fully illuminated,Pickford, p. 214. with her name spelled out in electric lights between the twin funnels.Pickford, p. 213. Distress calls from Tubantia were heeded and all 80 passengers and 294 crew were rescued by three nearby ships before the ship foundered. Tubantia was the largest neutral ship sunk during the war, and among the 30 largest ships sunk by U-boats.{{cite Uboat.net

|name=Largest Ships sunk or damaged

|id=largest

|type=1ship

|access-date=17 March 2009

}}

Germany initially tried to implicate British mines or torpedoes, but relented when confronted with evidence that it was one of their own torpedoes—which had been assigned to UB-13Sources almost invariably report the submarine as U-boat 13 or U-13. UB-13 was the only extant U-boat numbered 13 in March 1916; {{SMU|U-13||2}} and {{SMU|UC-13||2}} had been lost in 1914 and 1915, respectively. See: Helgason, Guðmundur.{{cite Uboat.net

|id=13

|name=U 13

|type=1ship

}},{{cite Uboat.net

|id=UC+13

|name=UC 13

|type=1ship

}}. U-Boat War in World War I. Uboat.net. Retrieved on 17 March 2009.—that had sunk Tubantia. The Germans, however, presented a forged log from UB-13 that showed her nowhere near Tubantia at the time of the attack. Further, they reported, UB-13 had fired that specific torpedo at a British warship on 6 March—ten days before Tubantia was sunk{{cite journal | last=Wilson | first=George Grafton | author-link=George Grafton Wilson | journal=The American Journal of International Law |title=Report of the International Commission of Inquiry in the Loss of the Dutch Steamer Tubantia | volume=16 | year=1922 | oclc=1480149 | doi=10.2307/2188183 | jstor=2188183 | issue=3 | pages=432–433 | publisher=American Society of International Law | s2cid=146986647 }}—which would have been under her previous commander, Kapitänleutnant Neumann. The U.S. Minister to the Netherlands, Henry van Dyke, writing in Fighting for Peace in 1917, called this explanation "amazing" and derided it:van Dyke, p. 430.

This certain U-boat had fired this particular torpedo at a British war-vessel somewhere in the North Sea ten days before the Tubantia was sunk. The shot missed its mark. But the naughty undisciplined little torpedo went cruising around in the sea on its own hook for ten days waiting for a chance to kill somebody. Then the Tubantia came along and the wandering-Willy torpedo promptly, obstinately, ran into the ship and sank her. This was the explanation. Germany was not to blame.

The Dutch public was furious at what they believed a hostile German act,van Tuyll van Serooskerken, p. 160. which caused German diplomats to spread rumors of an impending British invasion of the Netherlands to divert the unwanted attention.In 1922, four years after the war had ended an international committee found that Germany was responsible for sinking Tubantia and ordered them to pay Royal Holland Lloyd £830,000. See: Pickford, p. 214.

Amidst all of the denials and diplomatic wrangling over Tubantia{{'}}s sinking, UB-13 continued to sink ships. On 31 March, off Southwold, Metz and UB-13 sank the British steamer Alacrity. The {{GRT|1,080}} ship was carrying ballast destined for Seaham Harbour when she went down with fourteen crewman.{{cite Uboat.net

|name=Alacrity

|id=139

|type=1ship

|access-date=17 March 2009

}} Twelve days later, in the Kentish Knock area, UB-13 sank the Danish ship Proeven.{{cite Uboat.net

|name=Proeven

|id=4935

|type=1ship

|access-date=17 March 2009

}} The 276 GRT sailing vessel was the last ship sunk by UB-13.

On the evening of 23 April 1916, UB-13 departed Zeebrugge for a patrol off the mouth of the Thames and was never heard from again. Author Dwight Messimer, in his book Verschollen: World War I U-boat Losses, reports that the British had deployed a new explosive anti-submarine net at position {{coord|51|33|N|2|45|E}} in the early morning hours of 24 April. He suggests that it was possible UB-13 had set off some of the contact mines on the net, or possible that the submarine had struck a mine in one of the many British minefields off the Flemish coast.Messimer, p. 134. However, according to authors R. H. Gibson and Maurice Prendergast, in their book The German Submarine War, 1914–1918, UB-13 fouled the anchor cable of the British naval drifter Gleaner of the Sea on 24 April, and was depth charged by E.E.S.. Then for good measure, the British destroyer {{HMS|Afridi|1907|2}} deployed explosive sweeps against the submarine.Gibson and Prendergast, pp. 91–92. Whatever the specific cause of her demise, all seventeen crewmen on board the submarine were killed.

{{Reflist|group=Note}}

{{Reflist|colwidth=30em}}

{{Refbegin}}

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• {{cite book | editor1-last=Gardiner | editor1-first=Robert | editor2-last=Gray | editor2-first=Randal |title=Conway's All the World's Fighting Ships 1906–1921 | location=Annapolis, Maryland | publisher=Naval Institute Press | year=1985 | isbn=978-0-87021-907-8 | oclc=12119866 }}
• {{Gibson}}
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• {{cite book | last=Karau | first=Mark D. |title=Wielding the Dagger: the MarineKorps Flandern and the German War Effort, 1914–1918 | location=Westport, Connecticut | publisher=Praeger | year=2003 | isbn=978-0-313-32475-8 | oclc=51204317 }}
• {{cite book | last=Messimer | first=Dwight R. |title=Verschollen: World War I U-boat Losses | location=Annapolis, Maryland | publisher=Naval Institute Press | year=2002 | isbn=978-1-55750-475-3 | oclc=231973419 }}
• {{cite book | last=Miller | first=David |title=The Illustrated Directory of Submarines of the World | location=St. Paul, Minnesota | publisher=MBI Pub. Co | year=2002 | isbn=978-0-7603-1345-9 | oclc=50208951 }}
• {{cite book | last=Pickford | first=Nigel |title=Lost Treasure Ships of the Northern Seas: A Guide and Gazetteer to 2000 Years of Shipwreck | location=London | publisher=Chatham | year=2006 | isbn=978-1-86176-250-4 | oclc=67375472 }}
• {{cite book | last=Tarrant | first=V. E. |title=The U-Boat Offensive: 1914–1945 | location=Annapolis, Maryland | publisher=Naval Institute Press | year=1989 | isbn=978-0-87021-764-7 | oclc=20338385 }}
• {{cite book | last=van Dyke | first=Henry | author-link=Henry van Dyke |title=The works of Henry Van Dyke | location=New York | publisher=Charles Scribner's Sons | year=1921 | edition=Avalon | oclc=9473678 | isbn=0-665-81693-6 }}
• {{cite book | last=van Tuyll van Serooskerken | first=Hubert P. |title=The Netherlands and World War I: Espionage, Diplomacy and Survival | location=Leiden | publisher=Brill | year=2001 | isbn=978-90-04-12243-7 | oclc=48081143 }}
• {{cite book|first=Gordon| last=Williamson|author-link=Gordon Williamson (writer) |title=U-boats of the Kaiser's Navy | location=Oxford | publisher=Osprey | year=2002 | isbn=978-1-84176-362-0 | oclc=48627495 }}

{{Refend}}

{{German Type UB I submarines}}

{{April 1916 shipwrecks}}

{{Good article}}

{{DEFAULTSORT:Ub013}}

Category:German Type UB I submarines

Category:Ships built in Bremen (state)

Category:Ships built in Belgium

Category:1915 ships

Category:U-boats commissioned in 1915

Category:World War I submarines of Germany

Category:Maritime incidents in 1916

Category:U-boats sunk in 1916

Category:U-boats sunk by mines

Category:World War I shipwrecks in the North Sea

Category:Submarines lost with all hands