HMS Thunder was an 8-gun bomb vessel of the Royal Navy, originally launched as the mercantile ship Dasher at Bideford in 1800. Before her naval service, Dasher engaged in the triangular trade in enslaved people, making voyages to the Congo River and Havana, where she transported hundreds of captives. Her initial trade was Liverpool–Africa, and her master was T. Phillips, later Hamilton. Purchased by the Royal Navy in October 1803 amid renewed hostilities with France, Dasher was converted into a bomb vessel at Deptford Dockyard, undergoing fitting from November 1803 to February 1804. Commander George Cocks commissioned her for service in the Mediterranean, where she participated in numerous engagements and patrols. Throughout her service, HMS Thunder was active in capturing enemy vessels, including Africano in April 1805, and detaining various neutral ships, mainly Danish, Swedish, and Prussian, often sailing with cargoes such as brandy, cocoa, and fish. She was involved in the blockade and combat operations during the attack on Copenhagen in 1807, sharing in the prize money from several captured vessels. In 1808, under Commander James Caulfield, Thunder notably engaged Danish gunboats attempting to attack a British convoy near Copenhagen, successfully defending the merchant ships and earning a monetary reward from the merchants involved. Thunder also participated in the Battle of the Basque Roads in April 1809, shelling stranded French ships, and took part in the Walcheren Campaign later that year, providing bombardment support against French and enemy troops. She was involved in operations off Cádiz during the Anglo-Russian War, attacking French flotillas and supporting the British siege efforts. In 1813, Thunder captured the French privateer Neptune after a fierce boarding action off the Owers, with casualties on both sides. Her service record reflects her role in major naval actions of the Napoleonic Wars, including coastal bombardments, blockade enforcement, and privateer capture. She was sold in June 1814 for £1,250, marking the end of her distinguished career.

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