HMS Melampus was a 46-gun modified Leda-class fifth-rate frigate built for the Royal Navy during the 1810s. Completed in 1820, she was not commissioned until 1845 for the South America Station and was converted into a store and receiving ship in 1855. The ship was briefly assigned as a coast guard ship before being paid off in 1858. Melampus was converted into a Roman Catholic chapel ship in 1866 and then became a store ship twenty years later. The ship was sold for scrap in 1906.
Melampus had a length at the gundeck of 151 feet 10 inches (46.3 m) and 127 feet 1 inch (38.7 m) at the keel. She had a beam of 40 feet 6 inches (12.3 m), a draught of 14 feet 7 inches (4.4 m) and a depth of hold of 12 feet 9 inches (3.9 m). The ship's tonnage was 1088 56⁄94 tons burthen.[1] The modified Leda-class frigates were armed with twenty-eight 18-pounder cannon on her gundeck, fourteen 32-pounder carronades on her quarterdeck and a pair of 9-pounder cannon and two more 32-pounder carronades in forecastle. The ship had a crew of 315 officers and ratings.[2]
Melampus, the second ship of her name to serve in the Royal Navy,[3] was ordered on 1 May 1816, laid down in August 1817 at Pembroke Dockyard, Wales, and launched on 10 August 1820.[2] She was completed for ordinary at Plymouth Dockyard 2–23 September 1829 and was roofed over from the mainmast forward. The ship cost £23,007 to build and £7,072 to fit out for ordinary. She was fitted out for sea at a total cost of £9,156 from March to 18 May 1845.[1]
Melampus's first commission began on 12 March with Captain John Campbell in command and she was ready for sea on 18 May.[1]
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