HMS Encounter was a First-Class Sloop of the Royal Navy, built at Pembroke Dockyard with a keel laid in June 1845 and launched on 5 September 1846. Designed under John Fincham’s plans, she measured approximately 180 feet in length on her gun deck after modifications, with her original lengthening in 1848 extending her to about 190 feet. Her beam was around 33 feet 2 inches, with a depth of hold of approximately 20 feet 10 inches, and her tonnage increased from 894 to 935 tons builder’s measure following her 1848 alterations. Encounter was powered by a 360 nominal horsepower steam engine supplied by John Penn & Company, featuring two rectangular fire tube boilers and a single 12-foot diameter screw propeller. During full power trials, her engine produced approximately 673 indicated horsepower, achieving speeds of around 10.25 knots. Her armament at commissioning in 1849 consisted of a variety of muzzle-loading smoothbore guns, including a notable 68-pounder and 10-inch shell guns, with later modifications adding more 32-pounder guns and reconfiguring her armament in 1850. Constructed primarily for experimental service, she participated in the Royal Navy's "Experimental Squadrons" in the early 1850s, providing valuable comparative data on vessel performance. Her service history is marked by active involvement in significant colonial and military operations. She took part in the 1854 joint British-American action against Chinese troops in Shanghai, contributing to the suppression of unrest and the Second Opium War, including the bombardment and capture of Canton’s forts in late 1856. Assigned to the East Indies and China Station, Encounter was involved in anti-piracy operations along the Macao River and in the destruction of Russian batteries at Petropavlovsk during the Crimean War period. She also participated in the refloating of a stranded merchant ship and supported Chinese troops against rebels and pirates during her later service. After returning to Britain in 1864, Encounter was decommissioned and broken up at Devonport in 1866. Her career reflects the transitional period of naval technology and the strategic importance of gun-sloops in mid-19th-century maritime operations.

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