HMS Prometheus was a Pelorus class cruiser

Pelorus class cruiser

The Pelorus class cruiser was a "third-class" protected cruiser class of eleven Royal Navy warships designed by Sir William White , based on the earlier Pearl class cruisers. They were ordered in 1893 under the Spencer Program, and laid down 1896–1900...

 of 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...

. There were eleven "Third class" protected cruisers

Protected cruiser

The protected cruiser is a type of naval cruiser of the late 19th century, so known because its armoured deck offered protection for vital machine spaces from shrapnel caused by exploding shells above...

 in the class, which was designed by Sir William White

William Henry White

Sir William Henry White was a prolific British warship designer and Chief Constructor at the Admiralty....

. While well armed for their size, they were primarily workhorses for the overseas fleet on "police" duties and did not serve with the main battlefleet.

They displaced 2,135 tons, had a crew complement of 224 men and were armed with eight QF 4 inch (102 mm) (25 pounder) guns

QF 4 inch naval gun Mk I - III

The QF 4-inch gun Mks I, II, III were early British QF naval guns originating in 1895. They all had barrels of 40 calibres length.-Naval service:The gun was intended to be a more powerful alternative to the 3-inch QF 12 pounder gun....

, eight 3 pounder guns, three machine guns, and two 18 inch (457 mm) torpedo tubes. With reciprocating triple expansion engines

Steam engine

A steam engine is a heat engine that performs mechanical work using steam as its working fluid.Steam engines are external combustion engines, where the working fluid is separate from the combustion products. Non-combustion heat sources such as solar power, nuclear power or geothermal energy may be...

 and a variety of boilers, the top speed was 20 knots (39.2 km/h).

HMS Prometheus was laid down at Earle's Shipbuilding

Earle's Shipbuilding

Earle's Shipbuilding was an engineering company that was based in Hull, East Riding of Yorkshire, England from 1845 to 1932.-Earle Brothers:...

, Hull

Kingston upon Hull

Kingston upon Hull , usually referred to as Hull, is a city and unitary authority area in the ceremonial county of the East Riding of Yorkshire, England. It stands on the River Hull at its junction with the Humber estuary, 25 miles inland from the North Sea. Hull has a resident population of...

, in 1897, launched on 20 October 1898, and sold for scrap on 28 May 1914.