SM ''UB-91'' was a German

Type UB III submarine The Type UB III submarine was a class of U-boat built during World War I by the German Imperial Navy. Design UB III boats carried 10 torpedoes and were usually armed with either an or a deck gun. They carried a crew of 34 and had a cruising ...

U-boat U-boats are Submarine#Military, naval submarines operated by Germany, including during the World War I, First and Second World Wars. The term is an Anglicization#Loanwords, anglicized form of the German word , a shortening of (), though the G ...

in the

German Imperial Navy The Imperial German Navy or the ''Kaiserliche Marine'' (Imperial Navy) was the navy of the German Empire, which existed between 1871 and 1919. It grew out of the small Prussian Navy (from 1867 the North German Federal Navy), which was mainly f ...

() during

World War I World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...

. She was commissioned into the German Imperial Navy on 11 April 1918 as SM ''UB-91''. On 4 October 1918 ''UB-91'' sank the , killing among others,

Yokohama Specie Bank The was a Japanese bank founded in Yokohama in 1880, which dominated the Japanese market for trade finance in subsequent decades. It has been described as a "quasi-governmental exchange bank that was the overseas financial agent of the Japanese ...

sub-manager S. Ujie, his wife and three sons, together with bank employee Takashi Aoki and wife Sueko.

Construction

She was built by

AG Vulcan Aktien-Gesellschaft Vulcan Stettin (short AG Vulcan Stettin) was a German shipbuilding and locomotive building company. Founded in 1851, it was located near the former eastern German city of Szczecin, Stettin, today Polish Szczecin. Because of th ...

Hamburg Hamburg (, ; ), officially the Free and Hanseatic City of Hamburg,. is the List of cities in Germany by population, second-largest city in Germany after Berlin and List of cities in the European Union by population within city limits, 7th-lar ...

and following just under a year of construction, launched at Hamburg on 6 March 1918. ''UB-91'' was commissioned later the same year. Like all Type UB III submarines, ''UB-91'' carried 10

torpedo A modern torpedo is an underwater ranged weapon launched above or below the water surface, self-propelled towards a target, with an explosive warhead designed to detonate either on contact with or in proximity to the target. Historically, such ...

es and was armed with a deck gun. ''UB-91'' would carry a crew of up to 3 officer and 31 men and had a cruising range of . ''UB-91'' had a displacement of while surfaced and when submerged. Her engines enabled her to travel at when surfaced and when submerged.

Service history

''UB-91'' was surrendered to Britain on 21 November 1918 at

Harwich Harwich is a town in Essex, England, and one of the Haven ports on the North Sea coast. It is in the Tendring district. Nearby places include Felixstowe to the north-east, Ipswich to the north-west, Colchester to the south-west and Clacton-o ...

. She toured the

South Wales South Wales ( ) is a Regions of Wales, loosely defined region of Wales bordered by England to the east and mid Wales to the north. Generally considered to include the Historic counties of Wales, historic counties of Glamorgan and Monmouthshire ( ...

ports of

Cardiff Cardiff (; ) is the capital city, capital and List of urban areas in the United Kingdom, largest city of Wales. Cardiff had a population of in and forms a Principal areas of Wales, principal area officially known as the City and County of Ca ...

Newport Newport most commonly refers to: *Newport, Wales *Newport, Rhode Island, US Newport or New Port may also refer to: Places Asia *Newport City, Metro Manila, a Philippine district in Pasay * Newport (Vietnam), a United States Army and Army of t ...

Swansea Swansea ( ; ) is a coastal City status in the United Kingdom, city and the List of urban areas in the United Kingdom, second-largest city of Wales. It forms a Principal areas of Wales, principal area, officially known as the City and County of ...

Port Talbot Port Talbot (, ) is a town and community (Wales), community in the county borough of Neath Port Talbot, Wales, situated on the east side of Swansea Bay, approximately from Swansea. The Port Talbot Steelworks covers a large area of land which d ...

and was towed to

Pembroke Dock Pembroke Dock () is a town and a community in Pembrokeshire, South West Wales, northwest of Pembroke on the banks of the River Cleddau. Originally Paterchurch, a small fishing village, Pembroke Dock town expanded rapidly following the constr ...

, eventually being

broken up Ship breaking (also known as ship recycling, ship demolition, ship scrapping, ship dismantling, or ship cracking) is a type of ship disposal involving the breaking up of ships either as a source of Interchangeable parts, parts, which can be sol ...

Briton Ferry Briton Ferry () is a town and Community (Wales), community in the county borough of Neath Port Talbot, Wales. The Welsh name may indicate that the church, ''llan'', is protected from the wind, ''awel''. Alternatively, ''Sawel'' may be a deri ...

in 1921.

King George V George V (George Frederick Ernest Albert; 3 June 1865 – 20 January 1936) was King of the United Kingdom and the British Dominions, and Emperor of India, from 6 May 1910 until his death in 1936. George was born during the reign of his pa ...

presented her deck gun to the town of

Chepstow Chepstow () is a town and community in Monmouthshire, Wales, adjoining the border with Gloucestershire, England. It is located on the tidal River Wye, about above its confluence with the River Severn, and adjoining the western end of the ...

by in recognition of the bravery of

William Charles Williams William Charles Williams VC (15 September 1880 – 25 April 1915) was a British recipient of the Victoria Cross, the highest and most prestigious award for gallantry in the face of the enemy that can be awarded to British and Commonwealth force ...

RN VC at

Gallipoli The Gallipoli Peninsula (; ; ) is located in the southern part of East Thrace, the European part of Turkey, with the Aegean Sea to the west and the Dardanelles strait to the east. Gallipoli is the Italian form of the Greek name (), meaning ' ...

in 1915. The gun forms part of the Chepstow War Memorial.

Summary of raiding history

References

Notes

Citations

Bibliography

* * * {{DEFAULTSORT:Ub091 German Type UB III submarines World War I submarines of Germany U-boats commissioned in 1918 1918 ships Ships built in Hamburg