HMS Sentinel was one of two Sentinel class

Sentinel class cruiser

The Sentinel class was a two ship class of scout cruiser serving with the Royal Navy, and consisting of the ships HMS Sentinel and HMS Skirmisher.-History:...

 scout cruiser

Scout cruiser

A scout cruiser was a type of warship of the early 20th Century, which were smaller, faster, more lightly armed and armoured than protected cruisers or light cruisers, but larger than contemporary destroyers...

s which served with 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 built by Vickers Limited

Vickers Limited

Vickers Limited was a famous British engineering conglomerate that merged into Vickers-Armstrongs in 1927.-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 &...

, laid down in June 1903, launched on 19 April 1904 and completed in April 1905 at a cost of about £282,000. She was originally to be named HMS Inchkeith, but was renamed in 1903, prior to launching.

Design

She sported a partial turtle deck forward and shorter funnels than later ships of this type. She was designed to act as a leader of a destroyer flotilla

Flotilla

A flotilla , or naval flotilla, is a formation of small warships that may be part of a larger fleet. A flotilla is usually composed of a homogeneous group of the same class of warship, such as frigates, destroyers, torpedo boats, submarines, gunboats, or minesweepers...

 but like other ships of this type was soon proved to be too slow for the role. As turbine engined destroyers came into service, they were rendered obsolete. She was armed with ten 12 pounders, eight 3 pounders and two 18 inch torpedo tubes. In 1911-12 she was rearmed with nine 4 inch guns.

Career

HMS Sentinel began her career with the 3rd Cruiser Squadron in the Mediterranean, before being recalled to join the Channel Fleet

Channel Fleet

The Channel Fleet was the Royal Navy formation of warships that defended the waters of the English Channel from 1690 to 1909.-History:The Channel Fleet dates back at least to 1690 when its role was to defend England against the French threat under the leadership of Edward Russell, 1st Earl of...

, and then the Home Fleet from 1907. In 1910 she was leader of the 5th Destroyer Flotilla at Chatham

Chatham, Medway

Chatham is one of the Medway towns located within the Medway unitary authority, in North Kent, in South East England.Although the dockyard has long been closed and is now being redeveloped into a business and residential community as well as a museum featuring the famous submarine, HMS Ocelot,...

, then in 1913 moved to lead the 9th Destroyer Flotilla at Portsmouth

Portsmouth

Portsmouth is the second largest city in the ceremonial county of Hampshire on the south coast of England. Portsmouth is notable for being the United Kingdom's only island city; it is located mainly on Portsea Island...

.

She began World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

 in service with the 8th Destroyer Flotilla in the Firth of Forth

Firth of Forth

The Firth of Forth is the estuary or firth of Scotland's River Forth, where it flows into the North Sea, between Fife to the north, and West Lothian, the City of Edinburgh and East Lothian to the south...

 but, proving too sluggish for the role, in 1915 was temporarily attached with 6th Light Cruiser Squadron in the Humber

Humber

The Humber is a large tidal estuary on the east coast of Northern England. It is formed at Trent Falls, Faxfleet, by the confluence of the tidal River Ouse and the tidal River Trent. From here to the North Sea, it forms part of the boundary between the East Riding of Yorkshire on the north bank...

. Here she was used to guard against Zeppelin

Zeppelin

A Zeppelin is a type of rigid airship pioneered by the German Count Ferdinand von Zeppelin in the early 20th century. It was based on designs he had outlined in 1874 and detailed in 1893. His plans were reviewed by committee in 1894 and patented in the United States on 14 March 1899...

 raids. In 1916 she was stationed in the Mediterranean and then the Aegean

Aegean Sea

The Aegean Sea[p] is an elongated embayment of the Mediterranean Sea located between the southern Balkan and Anatolian peninsulas, i.e., between the mainlands of Greece and Turkey. In the north, it is connected to the Marmara Sea and Black Sea by the Dardanelles and Bosporus...

 in 1918. On 12 November 1918 Sentinel was part of the squadron sent through the Dardanelles

Dardanelles

The Dardanelles , formerly known as the Hellespont, is a narrow strait in northwestern Turkey connecting the Aegean Sea to the Sea of Marmara. It is one of the Turkish Straits, along with its counterpart the Bosphorus. It is located at approximately...

 to undertake duties in the Black Sea

Black Sea

The Black Sea is bounded by Europe, Anatolia and the Caucasus and is ultimately connected to the Atlantic Ocean via the Mediterranean and the Aegean seas and various straits. The Bosphorus strait connects it to the Sea of Marmara, and the strait of the Dardanelles connects that sea to the Aegean...

, where Britain was becoming involved in the Russian Civil War

Russian Civil War

The Russian Civil War was a multi-party war that occurred within the former Russian Empire after the Russian provisional government collapsed to the Soviets, under the domination of the Bolshevik party. Soviet forces first assumed power in Petrograd The Russian Civil War (1917–1923) was a...

. After the war Sentinel served as Mechanic’s training ship at Chatham between 1920 and 1922 before being sold for scrap on 18 January 1923. She arrived at Sunderland for breaking up on 20 June 1923 after having suffered a stranding on the way.