Reserve fleet in the context of "HMS Nelson (28)"

HMS Essex was one of 10 Monmouth-class armoured cruisers built for the Royal Navy in the first decade of the 20th century. Upon completion in 1904 she was assigned to the 2nd Cruiser Squadron of the Channel Fleet. The ship was placed in reserve in March 1906 and recommissioned in 1909 for service with the 4th Cruiser Squadron on the North America and West Indies Station. In 1912, Essex returned home and was assigned to the Training Squadron of the Home Fleet. After a refit the following year, she rejoined the 4th Cruiser Squadron in early 1914.

After the beginning of World War I in August, the ship captured a German merchantman the following month. Essex spent most of the first half of the war in the Atlantic Ocean, escorting convoys and searching for German commerce raiders. The ship captured another German merchantman in mid-1916 and was reduced to second-line roles such as depot ship and accommodation ship a few months later. She was paid off in 1919 and sold for scrap two years later.

SMS Eber was the last of the six gunboats of the Iltis class built for the German Kaiserliche Marine (Imperial Navy) in the late 1890s and early 1900s. The ships were built to modernize the German gunboat force that was used to patrol the German colonial empire. They were ordered in three groups of two ships, each pair incorporating design improvements. Eber, along with Panther, was armed with a main battery of two 10.5 cm (4.1 in) guns, had a top speed of 13.5 knots (25.0 km/h; 15.5 mph), and could cruise for 3,400 nautical miles (6,300 km; 3,910 mi).

Eber was completed in 1903, but spent the next seven years in reserve. She was activated for her first overseas deployment in 1910, to be sent to patrol the colonies in German West Africa. The next four years passed largely uneventfully for Eber, though in 1911, she participated in the Agadir Crisis in Morocco. After the start of World War I in July 1914, Eber left Africa to find a German ocean liner suitable for use as an auxiliary cruiser; she met Cap Trafalgar in late August, and she transferred both of her 10.5 cm guns to Cap Trafalgar, along with most of her crew. Eber thereafter sailed for then-neutral Brazil, where she remained until the Brazilian government entered the war on the side of the Triple Entente. To prevent her capture, the ship's remaining crew scuttled the ship on 26 October.

The United States Navy maintains a number of its ships as part of a reserve fleet, often called the "Mothball Fleet". While the details of the maintenance activity have changed several times, the basics are constant: keep the ships afloat and sufficiently working as to be reactivated quickly in an emergency.

In some cases (for instance, at the outset of the Korean War), many ships were successfully reactivated at a considerable savings in time and money. The usual fate of ships in the reserve fleet, though, is to become too old and obsolete to be of any use, at which point they are sold for scrapping or are scuttled in weapons tests.

The Russian battleship Potemkin (Russian: Князь Потёмкин Таврический, romanized: Kniaz Potyomkin Tavricheskiy, "Prince Potemkin of Taurida") was a pre-dreadnought battleship built for the Imperial Russian Navy's Black Sea Fleet. She became famous during the Revolution of 1905, when her crew mutinied against their officers. This event later formed the basis for Sergei Eisenstein's 1925 silent film Battleship Potemkin.

After the mutineers sought asylum in Constanța, Romania, and after the Russians recovered the ship, her name was changed to Panteleimon. She accidentally sank a Russian submarine in 1909 and was badly damaged when she ran aground in 1911. During World War I, Panteleimon participated in the Battle of Cape Sarych in late 1914. She covered several bombardments of the Bosphorus fortifications in early 1915, including one where the ship was attacked by the Ottoman battlecruiser Yavuz Sultan Selim – Panteleimon and the other Russian pre-dreadnoughts present drove her off before she could inflict any serious damage. The ship was relegated to secondary roles after Russia's first dreadnought battleship entered service in late 1915. She was by then obsolete and was reduced to reserve in 1918 in Sevastopol.