HMS Isis was a 50-gun Portland-class fourth-rate ship of the line constructed for the Royal Navy in 1774 on the River Medway. As a fourth-rate vessel, she was designed to carry a substantial armament suitable for fleet actions and versatile maritime operations. Commissioned in 1776 under Captain Charles Douglas, she quickly entered service, participating in notable conflicts of the late 18th and early 19th centuries. Throughout her career, HMS Isis was actively engaged in multiple significant naval battles and campaigns. She participated in the Battle of Cuddalore in 1783, a notable engagement during the American War of Independence. She also fought at the Battle of Camperdown in 1797, a decisive defeat of the Dutch fleet during the French Revolutionary Wars. Her involvement extended to the action of 22 August 1795 off Norway, where she engaged a Dutch squadron. The ship served as the flagship of Vice-Admiral Sir Andrew Mitchell during the 1799 Anglo-Russian invasion of Holland, illustrating her strategic importance. HMS Isis also played a role in the Battle of Copenhagen in 1801 under Captain James Walker, further exemplifying her active service during the Napoleonic Wars. On 10 May 1802, she arrived at Gibraltar with HRH Duke of Kent, who was the new Governor of Gibraltar. The vessel experienced significant weather damage during a hurricane while crossing the Atlantic to be Vice Admiral Gambier's flagship in Newfoundland, showcasing the perils of maritime service during this era. Her later service included deployments to Newfoundland, the Caribbean, and the North Sea, reflecting her versatility and continued operational relevance. After more than three decades of service, HMS Isis was broken up in September 1810, marking the end of her active career. Her service record highlights her role as a resilient and versatile vessel within the Royal Navy during a tumultuous period of maritime warfare.

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