HMS Invincible was an Audacious-class ironclad battleship constructed for the Royal Navy in the 1860s, completed in 1870 at the Napier shipyard. As a product of the transitional period in naval architecture, she combined traditional sail power with steam propulsion, reflecting her completion just a decade after HMS Warrior. The vessel measured considerable size for her time, featuring a broadside armament arrangement on a two-deck battery amidships, which offered a stable platform for her guns. Her main armament consisted of ten 9-inch muzzle-loading guns, supported by four 6-inch muzzle loaders, arranged to provide broadside firepower. The ship's design emphasized stability and firepower, typical of the era's ironclad battleships. Initially serving as a guardship at Hull during her first year, HMS Invincible was subsequently transferred to the Mediterranean Fleet, where she remained until 1886. During her Mediterranean service, she was involved in notable events such as her deployment to Cádiz in 1873 to prevent ships seized during the Spanish Civil War from leaving harbor. She also played a role in the 1882 bombardment of Alexandria, acting as Admiral Seymour’s temporary flagship when his usual flagship was unable to enter the harbor. Additionally, Invincible contributed men to landings during the Sudan campaign of 1885. Throughout her career, HMS Invincible saw various modifications and roles. Her engines were removed in 1901, after which she served as a depot ship at Sheerness for a destroyer flotilla. She was renamed HMS Erebus in 1904 and subsequently Fisgard II in 1906 when converted into a training ship for engineering artificers at Portsmouth. She met her end during a storm off Portland Bill on 17 September 1914 while being towed to Scapa Flow; she sank with the loss of 21 crew members and now rests upside down at a depth of approximately 164 feet. HMS Invincible's service history reflects her importance as a transitional ironclad vessel, participating in key naval operations and evolving roles over her four decades of service.

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