HMS Ultimatum (P34)
Encyclopedia
HMS Ultimatum (P34) was a Royal Navy
Royal Navy
The Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service...

 U-class
British U class submarine
The British U class submarines were a class of 49 small submarines built just before and during the Second World War...

 submarine
Submarine
A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which has more limited underwater capability...

 built by Vickers-Armstrong
Vickers
Vickers was a famous name in British engineering that existed through many companies from 1828 until 1999.-Early history:Vickers was formed in Sheffield as a steel foundry by the miller Edward Vickers and his father-in-law George Naylor in 1828. Naylor was a partner in the foundry Naylor &...

 at Barrow-in-Furness
Barrow-in-Furness
Barrow-in-Furness is an industrial town and seaport which forms about half the territory of the wider Borough of Barrow-in-Furness in the county of Cumbria, England. It lies north of Liverpool, northwest of Manchester and southwest from the county town of Carlisle...

, and part of the third group of that class. So far she has been the only ship of the Royal Navy to bear the name Ultimatum.

Career

Ultimatum spent her wartime career in the Mediterranean, where she sank the Italian passenger ship Dalmatia L., a German sailing vessel and the Italian submarine Ammiraglio Millo. On 30 October 1943, Ultimatum attacked a German U-boat southeast of Toulon
Toulon
Toulon is a town in southern France and a large military harbor on the Mediterranean coast, with a major French naval base. Located in the Provence-Alpes-Côte-d'Azur region, Toulon is the capital of the Var department in the former province of Provence....

, France
France
The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

. This attack was against U-73 but it inflicted no damage. Ultimatum had been credited with sinking U-431 in this attack. However U-431 was sunk with all hands on 21 October 1943 in the Mediterranean off Algiers by depth charges from a British Wellington aircraft. U-431s fate was revised in November 1987 by the Foreign Documents Section of the British Ministry of Defence.

Ultimatum also unsuccessfully attacked the Italian merchants Ravello, Luciano Manara and Unione, the Italian submarine Zaffiro and the German auxiliary patrol vessel Uj 6073 / Nimeth Allah. She had more luck on 2 May 1944, when she shelled the harbour of Kalamata, Greece, sinking two sailing vessels, destroying five on the slips and damaging another. She also went on to attack a group of small German vessels, successfully hitting and sinking the German barge F 811.

Ultimatum survived the war and was sold to be broken up for scrap on 23 December 1949, and was scrapped at Port Glasgow in February 1950.
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