HMS Porpoise, originally built as the mercantile vessel Lord Melville at South Shields, England, was a quarter-decked sloop with a tonnage of approximately 400 tons (bm). The Royal Navy purchased her in September 1804 and fitted her out at Deptford between March and July 1805, primarily for service as a storeship. Renamed HMS Porpoise, she was commissioned in April 1805 under Commander Joseph Short, serving as a flagship for Commodore William Bligh. Constructed with a typical quarter-decked sloop design, she was equipped to carry stores and serve in various auxiliary roles. Her early service included transporting Bligh to New South Wales in January 1806, arriving seven months later, with her acting as a principal naval unit in the colony. Porpoise played a notable role during the Rum Rebellion, with Bligh aboard after being deposed, and was involved in the complex command disputes during this turbulent period. Throughout her service, she was commanded by various officers, including Lieutenant James S.G. Symons and Commander John Porteous. After her arrival in New South Wales, she participated in diplomatic and military actions, such as detaining a Danish packet ship at the Cape of Good Hope and supporting Bligh during his governorship. In 1810, she returned to Britain, underwent a major refit at Woolwich, and made voyages to the West Indies, the Cape of Good Hope, and North America. By 1814, she served as a guardship at Sheerness and was laid up in 1815. The Royal Navy sold her in January 1816 for £1,600. She returned to mercantile service under her original name, Lord Melville, and undertook convict transportation voyages to New South Wales and Van Diemen’s Land. Her 1816 voyage carried 103 female prisoners to Sydney, and her 1818 voyage transported 149 male convicts to Hobart, marking the first direct voyage from England to Hobart. The vessel’s subsequent fate after 1820 remains unknown.

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