HMS Implacable,

 HMS Implacable was a 74-gun third-rate ship of the line of the Royal Navy. She was originally the French Navy's Téméraire-class ship of the line Duguay-Trouin, launched in 1800.

She survived the Battle of Trafalgar only for the British to capture her at the subsequent Battle of Cape Ortegal. In British service she participated in the capture of the Imperial Russian Navy 74-gun ship of the line Vsevolod in the Baltic in 1808 during the Anglo-Russian War. Later, Implacable became a training ship. Eventually, she became the second oldest ship in the Royal Navy after HMS Victory, Lord Nelson's flagship at Trafalgar. When the Royal Navy finally scuttled Implacable in 1949, she flew both the French and British flags side-by-side as she sank.