HMS Unison (P43) 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 Unison. Prior to receiving the name, she bore the pennant number P43, and was unofficially known as Ulysses

Career

Unison spent most of her wartime career in the Mediterranean, where she sank the Italian merchant Enrichetta, Maria Foscarini and Terni, the Italian sailing vessels Luigi Verni, Carlo P. and Angela, the German coaster Jaedjoer and the Italian tanker Zeila. She also damaged the Italian tanker Pozarica, and unsuccessfully attacked the Italian merchant Chisone, an unidentified medium-sized tanker, and the Italian light cruisers Raimondo Montecuccoli

Italian cruiser Raimondo Montecuccoli

Raimondo Montecuccoli was a Condottieri class light cruiser serving with the Italian Regia Marina during World War II. She survived the war and served in the post-war Marina Militare until 1964.-Design:...

 and Emanuelle Filiberto Duca d’Aosta

Italian cruiser Emanuele Filiberto Duca d'Aosta

Emanuele Filiberto Duca d'Aosta was an Italian light cruiser of the fourth group of the , that served in the Regia Marina during World War II. She survived the war, but was ceded as war reparation to the Soviet Navy in 1949...

.

She took part in operations Harpoon

Operation Harpoon (1942)

Not to be confused with Operation Harpoon Operation Harpoon was one of two simultaneous Allied convoys sent to supply Malta in the Axis-dominated Mediterranean Sea in mid-June 1942, during the Second World War. One convoy, Operation Vigorous, left Alexandria. The other, Operation Harpoon, travelled...

 and Vigorous

Operation Vigorous

Operation Vigorous was a World War II Allied operation to deliver a supply convoy that sailed from Haifa and Port Said on 12 June 1942 to Malta. The convoy encountered heavy Axis air and sea opposition and returned to Alexandria on 16 June....

. She was later fired on in error by a US tanker, causing damage to her pressure hull, although she was able to return to dock under her own power. The attack killed the Officer of the Watch, and severely injured three other crew members, including her captain, Lt Anthony Daniell DSO DSC*.

She was transferred to the Soviet Navy

Soviet Navy

The Soviet Navy was the naval arm of the Soviet Armed Forces. Often referred to as the Red Fleet, the Soviet Navy would have played an instrumental role in a Warsaw Pact war with NATO, where it would have attempted to prevent naval convoys from bringing reinforcements across the Atlantic Ocean...

on 26 June 1944, and renamed V3. She spent five years in Soviet service, being returned in 1949 and scrapped at Stockton in May 1950.