HMS C7 was a C-class

British C class submarine

The British C class submarines were the last class of petrol engined submarines of the Royal Navy and marked the end of the development of the Holland-class in the Royal Navy...

 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

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 &...

, 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...

 for the 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...

. She was laid down on 9 December 1905 and was commissioned on 23 May 1907.

Service history

C7 sunk off the Schouwen Bank in the North Sea

North Sea

In the southwest, beyond the Straits of Dover, the North Sea becomes the English Channel connecting to the Atlantic Ocean. In the east, it connects to the Baltic Sea via the Skagerrak and Kattegat, narrow straits that separate Denmark from Norway and Sweden respectively...

 on 5 April 1917. (She is often mistakenly credited with sinking UC-68 on 5 April 1917 in the North Sea near Schowen, The Netherlands. However, this attack was made against , which survived.)

UC-68 departed on 10 March 1917 from Flanders for a 10-day patrol, but the boat never returned. UC-68 was most likely destroyed by her own mine

Naval mine

A naval mine is a self-contained explosive device placed in water to destroy surface ships or submarines. Unlike depth charges, mines are deposited and left to wait until they are triggered by the approach of, or contact with, an enemy vessel...

s on or about 13 March 1917 off Start Point in the English Channel. A wreck located at position 50.19.09N - 03.30.00W is thought to be that of UC-68 but could be that of .

C7 was sold on 20 December 1919.