HMS Atlas was a 91-gun second-rate ship of the line, constructed at Chatham Dockyard, Kent, with a length of approximately 245 feet (74.68 meters). Laid down in 1858 and launched on 21 July 1860, she was intended to be powered by an 800-horsepower (600 kW) screw propeller, reflecting the transition from traditional sailing ships to steam-powered vessels. Had she been completed, her crew complement would have been around 860 men. Although designed as a formidable warship, Atlas was never fully completed for active service. She was initially slated for deployment with the Channel Fleet and was placed in reserve at Sheerness in 1861. Over the years, her armament was reduced from 91 guns to 54 in 1870, and she was fully disarmed by 1879, highlighting her shift away from frontline naval duties. She also underwent modifications, including the installation of engines and a generator in 1886 following a fire on another ship, which enabled her to be illuminated electrically. Her service history is notable for her use as a hospital ship. In 1881, amidst a smallpox outbreak, the Admiralty loaned her to the Metropolitan Asylums Board, where she was converted into a hospital capable of housing 250 patients. She was initially stationed at Greenwich, Kent, but due to opposition from local entities and logistical issues, she was moved to Deptford Creek in 1882 and later to Long Reach near Dartford in 1883. The vessel operated as a hospital ship until 1904, providing crucial medical services during a period of public health crises. In 1885, the Admiralty authorized her sale, and she was finally sold for breaking in December 1904, ending her lengthy and varied service life. Throughout her existence, HMS Atlas served as a symbol of maritime adaptation, transitioning from a potential warship to a vital medical facility, reflecting the evolving needs and technologies of the Royal Navy and public health efforts.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.