:SM UB-17

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-17 and sister boat {{SMU|UB-16||2}} comprised an order of two submarines ordered on 25 November from AG Weser of Bremen, a little more than three months after planning for the class began.Williamson, p. 12. UB-17 was laid down by Weser in Bremen on 21 February 1915. As built, UB-17 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-17 was rated to a diving depth of {{convert|50|m|ft}}, and could completely submerge in 33 seconds.

UB-17 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-17{{'}}s standard complement consisted of one officer and thirteen enlisted men.Karau, p. 49.

After work on UB-17 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 early 1915, the sections of UB-17 were shipped to Antwerp for assembly in what was typically a two- to three-week process. After UB-17 was assembled and launched on 21 April, 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-17 on 4 May 1915 under the command of Kapitänleutnant (Kapt.) {{ill|Ralph Wenninger|fr}}, a 25-year-old former skipper of {{SMU|UB-11||2}}.{{cite Uboat.net

|name=Ralph Wenninger

|id=398

|type=1comm

|access-date=19 March 2009

}}Wenninger was in the Navy's April 1907 cadet class with 34 other future U-boat captains, including Werner Fürbringer, Heino von Heimburg, Hans Howaldt, and Otto Steinbrinck. See: {{cite Uboat.net

|name=Crew 4/07

|id=4%2F07

|type=1crew

|access-date=12 March 2009

}} On 10 May, UB-17 joined the Flanders Flotilla ({{langx|de|U-boote des Marinekorps U-Flotille Flandern}}), which had been organized on 29 March. When UB-17 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:German Submarine Zone February 1915 after Reynolds et al.jpg.]]

On 18 July, Wenninger torpedoed the British tanker Batoum just off the Southwold lighthouse. Despite the loss of six men, Batoum{{'}}s crew was able to beach the ship, listed as {{GRT|4054|disp=long}}.{{cite Uboat.net

|name=Batoum (d.)

|id=668

|type=1ship

|access-date=18 March 2009

}}After Batoum was refloated, repaired, and re-entered service, she was torpedoed and sunk by {{SMU|U-61||2}} in June 1917. Early the next month, on 6 August, Wenninger and UB-17 sank four British fishing vessels while patrolling in the Yarmouth–Lowestoft area.Helgason, Guðmundur. {{cite Uboat.net

|id=1021

|name=C.e.s.

|type=1ship

}}, {{cite Uboat.net

|id=7307

|name=Fisherman

|type=1ship

}}, {{cite Uboat.net

|id=7087

|name=Hesperus

|type=1ship

}}, {{cite Uboat.net

|id=3083

|name=Ivan

|type=1ship

}} Retrieved on 19 March 2009. All four 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://old.penwith.gov.uk/index.cfm?articleid=23907 | publisher = Penwith District Council | location = Penzance | year = 2009 | access-date = 19 March 2009 }}{{Dead link|date=October 2023 |bot=InternetArchiveBot |fix-attempted=yes }}—which were stopped, boarded by crewmen from UB-17, 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=19 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 }}

On 18 August, the chief of the Admiralstab, Admiral Henning von Holtzendorff, issued orders suspending the first offensive 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. Holtzendorff's 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. Six days later, UB-17 seized the Belgian sailing vessel Leon Mathilde as a prize off Ostend.{{cite Uboat.net

|name=Leon Mathilde (p.)

|id=3567

|type=1ship

|access-date=19 March 2009

}}

Enemy naval targets were not subject to the prize regulations, so on 23 September, Wenninger torpedoed and sank the {{ship|French trawler|Saint Pierre I||2}}, a trawler of the French Navy off the Dyck lightship. There was only one survivor from the 303 GRT ship's eighteen-man crew.{{cite Uboat.net

|name=Saint Pierre I

|id=5339

|type=1ship

|access-date=19 March 2009

}} Three months later, Wenninger misidentified the 71 GRT French fishing ship Jesus Maria as a destroyer. UB-17 launched a torpedo which struck the ship and killed all six men of Jesus Maria{{'}}s crew.{{cite Uboat.net

|name=Jesus Maria

|id=3155

|type=1ship

|access-date=19 March 2009

}}

On 31 January 1916, in the Lowestoft–Aldeburgh area, UB-17 sank an additional four fishing ships: three British, and one Belgian.Helgason, Guðmundur. {{cite Uboat.net

|id=470

|name=Artur Wilhelm

|type=1ship

}}, {{cite Uboat.net

|id=2851

|name=Hilda

|type=1ship

}}, {{cite Uboat.net

|id=7272

|name=Marguerite

|type=1ship

}}, {{cite Uboat.net

|id=4996

|name=Radium

|type=1ship

}} Retrieved on 19 March 2009. The next day, UB-17{{'}}s war journal ({{langx|de|Kriegstagebücher}} or {{lang|de|KTB}}) records the torpedoing of the 957 GRT British steamer Franz Fischer off the Kentish Knock.{{cite Uboat.net

|name=Franz Fischer

|id=7399

|type=1ship

|access-date=19 March 2009

}} British records list the cargo ship as being sunk by bombs from a zeppelin.{{cite web |title=British merchant vessels lost at sea due to enemy action: 1914, 1915, 1916 in date order |url=http://www.naval-history.net/WW1LossesBrMS1914-16.htm | work = World War 1 at Sea | publisher = Naval-History.net | date = 9 January 2009|access-date=19 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 }} Franz Fischer was the last ship sunk with Wenninger in command. On 7 February, he was relieved by Oberleutnant zur See (Oblt.) Arthur Metz for a month,{{cite Uboat.net

|name=Arthur Metz

|id=201

|type=1comm

|access-date=19 March 2009

}} Kapt. Werner Fürbringer for a week,{{cite Uboat.net

|name=Werner Fürbringer

|id=81

|type=1comm

|access-date=19 March 2009

}} and Oblt. Friedrich Moecke for another month.{{cite Uboat.net

|name=Friedrich Moecke

|id=209

|type=1comm

|access-date=19 March 2009

}} Wenninger resumed command on 16 April.

In the meantime, Germany had begun its second submarine offensive against merchant shipping at the end of February in reaction to the British blockade of Germany. By early 1916, the British blockade was having 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, pp. 25–26. UB-17 sank no ships during this offensive, which was called off near the end of April by Admiral Reinhardt Scheer, the commander-in-chief of the High Seas Fleet.Tarrant, p. 30.

In mid-May, Scheer completed plans to draw out part of the British Grand Fleet.Gibson and Prendergast, p. 97. The German High Seas Fleet would sortie for a raid on Sunderland,Tarrant, p. 32. luring the British fleet across {{"'}}nests' of submarines and mine-fields". In support of the operation, UB-17 and five other Flanders boats set out at midnight 30/31 May to form a line {{convert|18|nmi}} east of Lowestoft.The other five boats for the May action were {{SMU|UB-6||2}}, {{SMU|UB-10||2}}, {{SMU|UB-12||2}}, UB-16, and {{SMU|UB-29||2}}. This group was to intercept and attack the British light forces from Harwich, should they sortie north to join the battle. Unfortunately for the Germans, the British Admiralty had intelligence reports of the departure of the submarines which, coupled with an absence of attacks on shipping, aroused British suspicions.

A delayed departure of the German High Seas Fleet for its sortie (which had been redirected to the Skagerrak) and the failure of several of the U-boats stationed to the north to receive the coded message warning of the British advance caused Scheer's anticipated ambush to be a "complete and disappointing failure". In UB-16{{'}}s group, only UB-10 sighted the Harwich forces, and they were too far away to mount an attack. The failure of the submarine ambush to sink any British capital ships allowed the full Grand Fleet to engage the numerically inferior High Seas Fleet in the Battle of Jutland, which took place 31 May – 1 June.Tarrant, pp. 32–33.

Wenninger left UB-17 for good on 27 June and was succeeded by Kapt. Günther Suadicani, who commanded the boat for just under two weeks. He was followed by Oblt. Hans Degetau, who commanded the boat from July to December.{{cite Uboat.net

|name=Hans Degetau

|id=48

|type=1comm

|access-date=19 March 2009

}} Under Degetau's leadership, UB-17 added another ship to her tally when she captured and sank the Dutch ship Zeearend on 1 September. The 462 GRT steamer was en route to London from Rotterdam with a cargo of piece goods when she was sunk {{convert|19|nmi}} from the Mass Lightship.{{cite Uboat.net

|name=Zeearend

|id=6622

|type=1ship

|access-date=19 March 2009

}} UB-17{{'}}s next success was the capture of the Norwegian steamer Birgit in the Hoofden area under the command of Kapt. Ulrich Meier, who had taken command on 4 December.{{cite Uboat.net

|name=Birgit (p.)

|id=6811

|type=1ship

|access-date=19 March 2009

}}{{cite Uboat.net

|name=Ulrich Meier

|id=198

|type=1comm

|access-date=19 March 2009

}} Birgit was the last success for UB-17 for the next twelve months.

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

UB-17 and three sister boats, UB-10, UB-12, and UB-16, were all converted to minelaying submarines by 1918. The conversion involved removing the bow section containing the pair of torpedo tubes from each U-boat and replacing it with a new bow containing four mine chutes capable of carrying two mines each. In the process, the boats were lengthened to {{convert|105|ft|m}}, and the displacement increased to {{convert|147|t|LT}} on the surface, and {{convert|161|t|LT}} below the surface. Exactly when this conversion was performed on UB-17 is not reported, but UB-17 was at the dockyard from November 1916 to January 1917,{{cite Uboat.net

|name=Hans Ewald Niemer

|id=224

|type=1comm

|access-date=19 March 2009

}} and it is possible UB-17 was converted during this same timeframe.

While Meier remained in command of UB-17, Kaiser Wilhelm II personally approved a resumption of unrestricted submarine warfare to begin on 1 February 1917 to help force the British to make peace.Tarrant, pp. 45–46. Although the new rules of engagement specified that no ship was to be left afloat,Tarrant, p. 46. UB-17 did not contribute to the effort until December 1917, when she captured and sank a single fishing smack off Aldeburgh under the direction of Oblt. Johannes Ries.{{cite Uboat.net

|name=Forward

|id=2240

|type=1ship

|access-date=19 March 2009

}}{{cite Uboat.net

|name=Johannes Ries

|id=268

|type=1comm

|access-date=19 March 2009

}} In January 1918, Ries was replaced by Oblt. Albert Branscheid.{{cite Uboat.net

|name=Albert Branscheid

|id=34

|type=1comm

|access-date=19 March 2009

}}

On 11 March 1918, Branscheid led UB-17 out from Zeebrugge for a patrol in the Hoofden and the U-boat was never seen again. One postwar account tells of two British seaplanes that bombed a U-boat in the North Sea on 12 March, but, according to author Dwight Messimer, the account provides no details to support the claim.Messimer, p. 136. Messimer also discounts an account that attributes UB-17{{'}}s sinking to British destroyer {{HMS|Onslow|1916|2}} on 25 February south of Portland by pointing out that UB-17 was in port in Zeebrugge on that date. A German postwar study also rejected a British claim that destroyers {{HMS|Thruster|1917|6}}, {{HMS|Retriever|1917|2}}, and {{HMS|Sturgeon|1917|2}} sank UB-17 at 21:25 on 11 March at position {{coord|57|7|N|2|43|E}} because UB-17 didn't depart Zeebrugge until 30 minutes after the attack took place. Whatever the specific cause of UB-17{{'}}s demise, all eighteen crewmen on board the submarine were killed.

In July 2013, archaeologists found the remains of 44 submarines, including UB-17, off the United Kingdom's southern and east coasts, near the county of Suffolk. The find was made up mostly of vessels from the German Imperial Navy dating to World War I. Der Spiegel reported divers located 41 German U-boats, and three of English submarines, found at depths of up to 50 feet, off England's southern and eastern coasts.

{{Reflist|group=Note}}

{{Reflist|colwidth=30em}}

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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 }}
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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 = Tarrant | first = V. E. |title=The U-Boat Offensive: 1914–1945 | location = Annapolis, Maryland | publisher = Naval Institute Press | year = 1989 | isbn = 9781854095206 | oclc = 20338385 }}
• {{cite book | last = Williamson | first = Gordon|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}}

{{March 1918 shipwrecks}}

{{DEFAULTSORT:Ub017}}

Category:German Type UB I submarines

Category:Ships built in Bremen (state)

Category:Ships built in Belgium

Category:U-boats commissioned in 1915

Category:World War I submarines of Germany

Category:Missing U-boats of World War I

Category:U-boats sunk in 1918