The Royal Navy commissioned her in June 1809 as HMS Rhin under Captain Frederick Aylmer for the Channel.

[5] On 27 September Wolverine had been in pursuit of a French brig when Rhin joined the chase and after two and a half hours captured the quarry off the Lizard.

[6][7] On 9 October Rhin captured the French privateer brig Comtesse de Montalivet, of Saint Malo.

[13] Almost two months later, on 27 May, Rhin was in company with the Princess Charlotte when they captured the American ship Fox.

[16] On 21 June Rhin and Medusa supported an attack by Spanish guerrillas on French forces Lequitio and the nearby island of San Nicholas.

[17] On 24 June, landing parties from Rhin and Medusa destroyed fortified works at Plencia.

[18] On 8 November Rhin was in company with the sloop Helicon when they captured the French privateer Courageuse.

[19] The capture took place off the Eddystone after a four-hour chase during which the privateer schooner threw overboard her 14 guns, her anchors and part of her provisions.

[20] On 5 January 1813 Rhin, Colossus and the brig Goldfinch captured the American ship Dolphin.

[23][Note 1] Then on 11 March Rhin captured the American letter of marque brig Rattlesnake.

[25] A satisfying capture occurred on 5 June when Rhin sighted and gave chase to an American privateer schooner.

After an eleven-hour chase Rhin captured Decatur in the Mona Passage about four leagues (19 km) from Cape Engaño.

[Note 2] The attack took place at Corrijou (Koréjou, east of Abervrach on the coast of Brittany), and during the action Ferret was able to prevent the escape of a French man-of-war brig that she force ashore.