SM UB-50

SM ''UB-50'' was a German Type UB III submarine or U-boat in the German Imperial Navy (german: Kaiserliche Marine) during World War I. The U-boat was ordered on 20 May 1916. She was commissioned into the Pola Flotilla of the German Imperial Navy on 12 July 1917 as SM ''UB-50''.) and combined with the ''U'' for ''Unterseeboot'' would be translated as ''His Majesty's Submarine''., group=Note

The submarine conducted seven patrols and sank 40 ships during the war for a total loss of and 16,499 tons. She operated as part of the Pola Flotilla based in Cattaro. ''UB-50'' surrendered on 16 January 1919 with the remainder of the Pola Flotilla following an order by Admiral Reinhard Scheer to return to port. During her passage through the Straits of Gibraltar, she managed to sink the battleship . ''UB-50'' was later broken up at Swansea.

Construction

''UB-50'' was ordered by the German Imperial Navy on 20 May 1916. She was built by Blohm & Voss, Hamburg and following just under a year of construction, launched at Hamburg on 6 January 1917. ''UB-50'' was commissioned later that same year under the command of Kapitänleutnant (Kptlt.) Franz Becker. Like all Type UB III submarines, ''UB-50'' carried 10 torpedoes and was armed with an SK L/30 deck gun. ''UB-50'' could carry a crew of up to 34 men and had a cruising range of . ''UB-50'' had a displacement of while surfaced and when submerged. Her engines enabled her to travel at when surfaced and when submerged.

Service history

First patrol

Soon after she left Pola, ''UB-50'' encountered the ''William H. Crawford'', a American sailing ship. It sank after an attack from the U-boat stopped her. Four days later, ''UB-50'' sighted the British barge ''R.B.40''. ''UB 50'' launched a torpedo which instead hit the British tug towing the ship, the ''H.s.3''. The tug sank, but the barge was not sunk. The following day, ''UB-50'' found two Portuguese sailboats ''Correiro De Sines'' and ''Comizianes Da Graca'' at and respectively. They were sunk north of Cape Sines. A day later, she found the Portuguese ship ''Sado'', which she sank about south of her prey the day before. Four days later, ''UB-50'' finally encountered and sank a merchant, this being the British ''Polar Prince'', carrying coal for Malta. Two days later, she sank the ''Fabian'', a British steamer going to Liverpool, killing three. Later that day, she sank the ''Gioffredo Mameli'', a ton Italian steamer carrying ore. The coal carrying Greek steamer ''Alkyon'' was attacked two days later by ''UB-50'', sinking close off Oran. The UB 50 followed up with the sinking of the Norwegian steamer ''John Knudsen'', killing one. Four days later, the Italian sailboat ''Ciro'' was scuttled after being hit by ''UB-50'', the last ship she would sink before returning to base.

Second patrol

SM ''UB-50'' began her second patrol with the sinking of the ''Marc Fraissinet'', a French steamer carrying wood, munitions, and hay to Bizerte. It sank north of Tabarca after being torpedoed by ''UB-50''. Later that day UB 50 encountered the ''Senegal'', an Italian steamer, sinking her off the coast of Algeria with no casualties. Three days after that, the ''Margram Abbey'', a British steamer carrying coal, was found and torpedoed by ''UB-50''. It was beached off the coast of Algeria, but the torpedo damage, which killed two, had wrecked the ship. UB 50 attacked the ''Antaeus'', a British steamer, three days later off Cape Bon. There were no casualties, but the captain was taken prisoner. On the following day, UB 50 torpedoed the ''Amberton'', a British steamer, but she was only damaged. Four days later, the submarine found her last target of her second patrol, the American steamer ''Rizal'', which sank from Cape Cavallo.

Third patrol

''UB-50'' started out her third patrol by finding and sinking the Italian sailboat ''S. Giuseppe B.'' off the coast of Africa. She sank the British steamer ''City of Lucknow'' two days later northeast of the Cani Rocks. On Christmas Day, 1917, ''UB-50'' sank the ''Sant’ Antonio'', an Italian sailing vessel, by gunfire near Bizerte. On New Year's Day, 1918, the ''Egyptian Transport'', a British steamer, was damaged during an attack by ''UB-50'', which killed five men. It was later beached but refloated. Two days later, the ''Allanton'', a British steamer carrying coal, was sunk by UB-50, which also sunk the ''Steelville'', a British steamer also carrying coal later that day. Four days later, ''UB-50'' torpedoed the ''Arab'', a British steamer coal off the coast of Cape Serrat, killing 21.

Fourth patrol

''UB-50''s fourth patrol was very successful. In less than a month, she sank six vessels. The first victim was the French steamer ''Saint Jean Ii'', which went down 22 March 1918 off Cap Bon. That same day, ''UB-50'' managed to damage the British steamer ''Shadwell'' off Bizerta. Four days later ''UB-50'' sank the Italian steamer ''Volturno'' off Bone (Annaba), Algeria. On 6 April, ''UB-50'' sank the French vessel ''Madeleine Iii'' and on 11 April, she sank the Italian sailing ship ''Carmela G'' and the British vessel ''Highland Prince''.

Fifth patrol

''UB-50'' began her fifth war patrol by damaging the British steamer ''Elswick Grange'' carrying coal off the coast of Oran, killing one. Two days later, she ran across the British steamer ''Mavisbrook'' carrying coal. She was torpedoed south east of Cabo de Gata, killing 18. On that same day, she came upon the Danish three-masted iron-hulled schooner ''Kirstine Jesen'', sinking after being fired upon from ''UB-50'''s deck gun with no deaths. Two days later, the ''New Sweden'', a Swedish steamer, was hit by ''UB-50'' and sank. Two days later, ''UB-50'' found the Spanish steamer ''Maria Pia'', which sank with no casualties. Three days after that, the French sailboat ''Animal Lafont'' and Italian sailboat ''Santa Teresa'' were torpedoed by the U-boat with no casualties.

Sixth patrol

Shortly before her sixth patrol, Oberleutnant zur See Heinrich Kukat took over command from Kptlt. Becker. On her sixth patrol, ''UB-50'' encountered the ''Imber'', a British steamer and torpedoed her south of Cape St. Maria di Leuca, though she survived. Three days later, ''UB-50'' sank the ''War Swallow'', a British merchant ship carrying coal from the River Tyne to Port Said. Another three days passed before ''UB-50'' found her next target, the Italian steamer ''Adria 1'', a ship carrying cotton from Palermo to Tunis. It sank, but there were no deaths. Two days later, the British steamer ''Upada'' was torpedoed by ''UB-50'' killing three, but was only damaged. ''UB-50'' sank the ''Messidor'', a British coal steamer two days later, sinking the ship and killing one. The following day, she torpedoed the ''Rutherglen'', a British steam merchant carrying coal. That was followed by an attack on the ''Magellan'', a British steamer on the following day. She sank with one man. The last ship sunk on the patrol was the ''Antonio S.'', a Italian sailboat sunk off the coast of Tunisia.

Seventh patrol

On 9 November 1918, two days before the Armistice with Germany, ''UB-50'' sank the British battleship HMS ''Britannia''. The ''Britannia'' was on a voyage to Gibraltar when she was torpedoed off Cape Trafalgar. After the initial explosion, the ship began listing ten degrees to port. A few minutes later, another explosion started a fire in a magazine, which resulted in a cordite explosion in the magazine. The ''Britannia'' stayed at 10-degrees for 2½ hours before sinking.Burt, p. 253, says that ''Britannia'' listed 10 degrees within "minutes" of the first explosion, then held that list for 2½ hours before sinking, while ''Conway's All the World's Fighting Ships 1906–1921'', p. 9, claims that she stayed afloat for a total of 3½ hours before sinking, making the length of time it took her to sink ambiguous Its 16,350-tons made it the largest ship the U-boat ever sank, and the only one ''UB-50'' would sink during her last patrol.

Summary of raiding history

References

Notes

Citations

Bibliography

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{{DEFAULTSORT:Ub050
German Type UB III submarines
World War I submarines of Germany
U-boats commissioned in 1917
1917 ships
Ships built in Hamburg